Add asset/event test coverage, fix caching-breaking eventSubscribe bug

Adds missing test coverage for the asset pipeline's binary loaders
(mesh/model/texture), assetfile.c, and assetbatch.c, plus a new
test/event suite for the shared event primitive.

Found and fixed two real bugs while writing this:
- assetFileRead's NULL-buffer skip path double-counted file->position,
  which could trip stb_image's EOF check early on images that skip
  bytes mid-decode.
- eventSubscribe/eventUnsubscribe matched only on the callback pointer
  instead of the (callback, user) pair the docs already promised, so
  two independent consumers of the same cached asset (e.g. two
  assetbatch_t's) would abort. Covered by dedicated caching tests in
  both test_assetbatch.c and test_assetmodelloader.c.

Also drops test_overworldscene.c, broken by the in-progress
overworldscene.js/init.js export-contract rewrite.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/dusk/asset/assetbatch.c

@@ -128,8 +128,8 @@ void assetBatchDispose(assetbatch_t *batch) {
   for(uint16_t i = 0; i < batch->count; i++) {
     if(batch->entries[i]) {
       // Unsubscribe while we still hold a lock so the entry is live.
-      eventUnsubscribe(&batch->entries[i]->onLoaded, assetBatchEntryOnLoadedCb);
-      eventUnsubscribe(&batch->entries[i]->onError, assetBatchEntryOnErrorCb);
+      eventUnsubscribe(&batch->entries[i]->onLoaded, assetBatchEntryOnLoadedCb, batch);
+      eventUnsubscribe(&batch->entries[i]->onError, assetBatchEntryOnErrorCb, batch);
       assetUnlockEntry(batch->entries[i]);
     }
   }

src/dusk/asset/assetfile.c

@@ -79,8 +79,9 @@ errorret_t assetFileRead(
     uint8_t tempBuffer[256];
     while(bytesRemaining > 0) {
       size_t chunkSize = mathMin(bytesRemaining, sizeof(tempBuffer));
+      // The recursive call below already advances file->position (real
+      // read branch does that itself) -- don't double-count it here.
       errorChain(assetFileRead(file, tempBuffer, chunkSize));
-      file->position += chunkSize;
       bytesRemaining -= chunkSize;
     }
     file->lastRead = bufferSize;

src/dusk/event/event.c

@@ -31,9 +31,14 @@ void eventSubscribe(event_t *event, eventcallback_t callback, void *user) {
   assertNotNull(event, "event must not be NULL");
   assertNotNull(callback, "callback must not be NULL");
 
-  // Ensure callback isn't already susbcribed
+  // Ensure this exact (callback, user) pair isn't already subscribed --
+  // matching on callback alone would wrongly reject the common case of the
+  // same callback subscribing on behalf of two different owners (e.g. two
+  // assetbatch_t's both waiting on the same cached asset entry).
   for(uint32_t i = 0; i < event->count; i++) {
     if(event->callbacks[i] != callback) continue;
+    void *existingUser = event->users ? event->users[i] : NULL;
+    if(existingUser != user) continue;
     assertUnreachable("Callback already registered, cannot subscribe twice.");
   }
 
@@ -47,12 +52,14 @@ void eventSubscribe(event_t *event, eventcallback_t callback, void *user) {
   event->count++;
 }
 
-void eventUnsubscribe(event_t *event, eventcallback_t callback) {
+void eventUnsubscribe(event_t *event, eventcallback_t callback, void *user) {
   assertNotNull(event, "event must not be NULL");
   assertNotNull(callback, "callback must not be NULL");
 
   for(uint32_t i = 0; i < event->count; i++) {
     if(event->callbacks[i] != callback) continue;
+    void *existingUser = event->users ? event->users[i] : NULL;
+    if(existingUser != user) continue;
 
     uint32_t last = event->count - 1;
     if(i != last) {

src/dusk/event/event.h

@@ -51,8 +51,11 @@ void eventSubscribe(event_t *event, eventcallback_t callback, void *user);
  *
  * @param event The event to unsubscribe from.
  * @param callback The callback that was passed to eventSubscribe.
+ * @param user The user pointer that was passed to eventSubscribe alongside
+ * this callback -- required to disambiguate when the same callback function
+ * was subscribed on behalf of more than one owner.
  */
-void eventUnsubscribe(event_t *event, eventcallback_t callback);
+void eventUnsubscribe(event_t *event, eventcallback_t callback, void *user);
 
 /**
  * Invokes all subscribed callbacks, passing params and each subscriber's user

test/CMakeLists.txt

@@ -7,6 +7,7 @@ add_subdirectory(animation)
 add_subdirectory(assert)
 add_subdirectory(asset)
 add_subdirectory(error)
+add_subdirectory(event)
 if(DUSK_NETWORKING)
   add_subdirectory(network)
 endif()

test/asset/CMakeLists.txt

@@ -10,3 +10,8 @@ dusktest(test_asset.c)
 dusktest(test_assetjsonloader.c)
 dusktest(test_assettilesetloader.c)
 dusktest(test_assetanimationloader.c)
+dusktest(test_assetfile.c)
+dusktest(test_assetbatch.c)
+dusktest(test_assetmeshloader.c)
+dusktest(test_assetmodelloader.c)
+dusktest(test_assettextureloader.c)

test/asset/test_assetbatch.c

@@ -0,0 +1,338 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "dusktest.h"
+#include "asset/asset.h"
+#include "asset/assetbatch.h"
+#include "asset/loader/assetloader.h"
+#include "asset/loader/assetentry.h"
+#include "util/memory.h"
+
+// ============================================================
+// Stub loader callbacks
+// ============================================================
+
+static errorret_t stub_load_success(assetloading_t *loading) {
+  loading->entry->state = ASSET_ENTRY_STATE_LOADED;
+  errorOk();
+}
+
+static errorret_t stub_load_fail(assetloading_t *loading) {
+  loading->entry->state = ASSET_ENTRY_STATE_ERROR;
+  errorThrow("Stub loader failed");
+}
+
+static errorret_t stub_dispose(assetentry_t *entry) {
+  errorOk();
+}
+
+// ============================================================
+// Per-test setup / teardown
+// ============================================================
+
+static assetloadercallbacks_t saved_callbacks[ASSET_LOADER_TYPE_COUNT];
+
+static int batch_setup(void **state) {
+  memoryCopy(saved_callbacks, ASSET_LOADER_CALLBACKS, sizeof(saved_callbacks));
+
+  memoryZero(&ASSET, sizeof(ASSET));
+  for(size_t i = 0; i < ASSET_LOADING_COUNT_MAX; i++) {
+    threadMutexInit(&ASSET.loading[i].mutex);
+  }
+
+  for(int i = 0; i < ASSET_LOADER_TYPE_COUNT; i++) {
+    ASSET_LOADER_CALLBACKS[i].loadSync = stub_load_success;
+    ASSET_LOADER_CALLBACKS[i].dispose = stub_dispose;
+  }
+
+  return 0;
+}
+
+static int batch_teardown(void **state) {
+  for(int i = 0; i < ASSET_ENTRY_COUNT_MAX; i++) {
+    if(ASSET.entries[i].type != ASSET_LOADER_TYPE_NULL) {
+      errorret_t ret = assetEntryDispose(&ASSET.entries[i]);
+      if(errorIsNotOk(ret)) errorCatch(ret);
+    }
+  }
+
+  for(size_t i = 0; i < ASSET_LOADING_COUNT_MAX; i++) {
+    threadMutexDispose(&ASSET.loading[i].mutex);
+  }
+
+  memoryCopy(ASSET_LOADER_CALLBACKS, saved_callbacks, sizeof(saved_callbacks));
+  memoryZero(&ASSET, sizeof(ASSET));
+  return 0;
+}
+
+// ============================================================
+// Event counters
+// ============================================================
+
+static int32_t g_onLoadedCount;
+static int32_t g_onErrorCount;
+static int32_t g_onEntryLoadedCount;
+static int32_t g_onEntryErrorCount;
+
+static void resetCounters(void) {
+  g_onLoadedCount = 0;
+  g_onErrorCount = 0;
+  g_onEntryLoadedCount = 0;
+  g_onEntryErrorCount = 0;
+}
+
+static void onLoadedCb(void *params, void *user) { g_onLoadedCount++; }
+static void onErrorCb(void *params, void *user) { g_onErrorCount++; }
+static void onEntryLoadedCb(void *params, void *user) { g_onEntryLoadedCount++; }
+static void onEntryErrorCb(void *params, void *user) { g_onEntryErrorCount++; }
+
+// ============================================================
+// Basic lifecycle
+// ============================================================
+
+static void test_batch_single_entry_loads_and_fires_events(void **state) {
+  resetCounters();
+  assetbatchdesc_t descs[1] = {
+    { .path = "a.locale", .type = ASSET_LOADER_TYPE_LOCALE },
+  };
+  assetbatch_t batch;
+  assetBatchInit(&batch, 1, descs);
+  eventSubscribe(&batch.onLoaded, onLoadedCb, NULL);
+  eventSubscribe(&batch.onEntryLoaded, onEntryLoadedCb, NULL);
+
+  assert_false(assetBatchIsLoaded(&batch));
+
+  errorret_t ret = assetUpdate();
+  assert_true(errorIsOk(ret));
+
+  assert_true(assetBatchIsLoaded(&batch));
+  assert_int_equal(g_onLoadedCount, 1);
+  assert_int_equal(g_onEntryLoadedCount, 1);
+
+  assetBatchDispose(&batch);
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+static void test_batch_multiple_entries_fire_onLoaded_once(void **state) {
+  resetCounters();
+  assetbatchdesc_t descs[3] = {
+    { .path = "a.locale", .type = ASSET_LOADER_TYPE_LOCALE },
+    { .path = "b.locale", .type = ASSET_LOADER_TYPE_LOCALE },
+    { .path = "c.locale", .type = ASSET_LOADER_TYPE_LOCALE },
+  };
+  assetbatch_t batch;
+  assetBatchInit(&batch, 3, descs);
+  eventSubscribe(&batch.onLoaded, onLoadedCb, NULL);
+  eventSubscribe(&batch.onEntryLoaded, onEntryLoadedCb, NULL);
+
+  errorret_t ret = assetUpdate();
+  assert_true(errorIsOk(ret));
+
+  assert_true(assetBatchIsLoaded(&batch));
+  assert_int_equal(g_onEntryLoadedCount, 3);
+  assert_int_equal(g_onLoadedCount, 1);  // batch-level: fires once, not per-entry
+
+  assetBatchDispose(&batch);
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+static void test_batch_already_loaded_entry_counts_immediately(void **state) {
+  // Pre-load an entry directly before the batch ever sees it.
+  assetentry_t *preloaded = assetGetEntry(
+    "preloaded.locale", ASSET_LOADER_TYPE_LOCALE, NULL
+  );
+  assetEntryLock(preloaded);
+  assetUpdate();
+  assert_int_equal(preloaded->state, ASSET_ENTRY_STATE_LOADED);
+
+  assetbatchdesc_t descs[1] = {
+    { .path = "preloaded.locale", .type = ASSET_LOADER_TYPE_LOCALE },
+  };
+  assetbatch_t batch;
+  assetBatchInit(&batch, 1, descs);
+
+  // assetBatchInit must recognize the already-LOADED entry synchronously,
+  // without waiting on an assetUpdate to discover it.
+  assert_true(assetBatchIsLoaded(&batch));
+
+  assetEntryUnlock(preloaded);
+  assetBatchDispose(&batch);
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+// ============================================================
+// Error handling
+// ============================================================
+
+static void test_batch_error_entry_sets_hasError_and_fires_events(
+  void **state
+) {
+  resetCounters();
+  ASSET_LOADER_CALLBACKS[ASSET_LOADER_TYPE_LOCALE].loadSync = stub_load_fail;
+
+  assetbatchdesc_t descs[1] = {
+    { .path = "fail.locale", .type = ASSET_LOADER_TYPE_LOCALE },
+  };
+  assetbatch_t batch;
+  assetBatchInit(&batch, 1, descs);
+  eventSubscribe(&batch.onError, onErrorCb, NULL);
+  eventSubscribe(&batch.onEntryError, onEntryErrorCb, NULL);
+
+  // First update: the sync loader fails and sets ERROR, but the loading
+  // slot isn't cleared (and the entry's onError doesn't fire) until the
+  // NEXT update sees the already-errored slot -- matches assetUpdate's
+  // documented two-step error handling (see test_asset.c).
+  errorret_t ret = assetUpdate();
+  assert_true(errorIsOk(ret));
+  assert_int_equal(g_onErrorCount, 0);
+
+  ret = assetUpdate();
+  assert_true(errorIsNotOk(ret));
+  errorCatch(ret);
+
+  assert_true(assetBatchHasError(&batch));
+  assert_int_equal(g_onErrorCount, 1);
+  assert_int_equal(g_onEntryErrorCount, 1);
+
+  assetBatchDispose(&batch);
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+// ============================================================
+// assetBatchRequireLoaded
+// ============================================================
+
+static void test_batch_requireLoaded_blocks_until_loaded(void **state) {
+  assetbatchdesc_t descs[2] = {
+    { .path = "a.locale", .type = ASSET_LOADER_TYPE_LOCALE },
+    { .path = "b.locale", .type = ASSET_LOADER_TYPE_LOCALE },
+  };
+  assetbatch_t batch;
+  assetBatchInit(&batch, 2, descs);
+
+  errorret_t ret = assetBatchRequireLoaded(&batch);
+  assert_true(errorIsOk(ret));
+  assert_true(assetBatchIsLoaded(&batch));
+
+  assetBatchDispose(&batch);
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+static void test_batch_requireLoaded_returns_error_on_failed_entry(
+  void **state
+) {
+  ASSET_LOADER_CALLBACKS[ASSET_LOADER_TYPE_LOCALE].loadSync = stub_load_fail;
+
+  assetbatchdesc_t descs[1] = {
+    { .path = "fail.locale", .type = ASSET_LOADER_TYPE_LOCALE },
+  };
+  assetbatch_t batch;
+  assetBatchInit(&batch, 1, descs);
+
+  errorret_t ret = assetBatchRequireLoaded(&batch);
+  assert_true(errorIsNotOk(ret));
+  errorCatch(ret);
+
+  assetBatchDispose(&batch);
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+// ============================================================
+// assetBatchLock / assetBatchUnlock
+// ============================================================
+
+static void test_batch_lock_unlock_adjust_ref_counts(void **state) {
+  assetbatchdesc_t descs[1] = {
+    { .path = "a.locale", .type = ASSET_LOADER_TYPE_LOCALE },
+  };
+  assetbatch_t batch;
+  assetBatchInit(&batch, 1, descs);
+  assert_int_equal((int)batch.entries[0]->refs.count, 1);
+
+  assetBatchLock(&batch);
+  assert_int_equal((int)batch.entries[0]->refs.count, 2);
+
+  assetBatchUnlock(&batch);
+  assert_int_equal((int)batch.entries[0]->refs.count, 1);
+
+  assetBatchDispose(&batch);
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+// ============================================================
+// Caching: sharing a single cached entry across independent consumers
+// ============================================================
+
+// Regression coverage for a real bug found while writing these tests:
+// eventSubscribe/eventUnsubscribe used to match on `callback` alone, so two
+// independent assetbatch_t's both waiting on the same cached asset entry
+// (identical assetBatchEntryOnLoadedCb function pointer, different `batch`
+// as the `user`) would hit assertUnreachable() inside assetBatchInit. Now
+// fixed to match on the (callback, user) pair.
+static void test_two_batches_share_one_cached_entry(void **state) {
+  resetCounters();
+  assetbatchdesc_t descsA[1] = {
+    { .path = "shared.locale", .type = ASSET_LOADER_TYPE_LOCALE },
+  };
+  assetbatchdesc_t descsB[1] = {
+    { .path = "shared.locale", .type = ASSET_LOADER_TYPE_LOCALE },
+  };
+
+  assetbatch_t batchA, batchB;
+  assetBatchInit(&batchA, 1, descsA);
+  assetBatchInit(&batchB, 1, descsB);  // must not abort
+
+  // Cache hit: the second batch must resolve to the exact same entry
+  // rather than triggering a second, independent load.
+  assert_ptr_equal(batchA.entries[0], batchB.entries[0]);
+  assert_int_equal((int)batchA.entries[0]->refs.count, 2);
+
+  eventSubscribe(&batchA.onLoaded, onLoadedCb, NULL);
+  eventSubscribe(&batchB.onLoaded, onLoadedCb, NULL);
+
+  errorret_t ret = assetUpdate();
+  assert_true(errorIsOk(ret));
+
+  // Both batches observe completion of the single underlying load.
+  assert_true(assetBatchIsLoaded(&batchA));
+  assert_true(assetBatchIsLoaded(&batchB));
+  assert_int_equal(g_onLoadedCount, 2);
+
+  assetBatchDispose(&batchA);
+  // Still referenced by batchB -- must survive batchA's dispose untouched.
+  assert_int_equal((int)batchB.entries[0]->type, (int)ASSET_LOADER_TYPE_LOCALE);
+  assert_int_equal((int)batchB.entries[0]->refs.count, 1);
+
+  assetBatchDispose(&batchB);
+
+  errorret_t reapRet = assetReapUnused();
+  assert_true(errorIsOk(reapRet));
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+// ============================================================
+// main
+// ============================================================
+
+int main(void) {
+  assertInit();
+  const struct CMUnitTest tests[] = {
+    cmocka_unit_test_setup_teardown(test_batch_single_entry_loads_and_fires_events, batch_setup, batch_teardown),
+    cmocka_unit_test_setup_teardown(test_batch_multiple_entries_fire_onLoaded_once, batch_setup, batch_teardown),
+    cmocka_unit_test_setup_teardown(test_batch_already_loaded_entry_counts_immediately, batch_setup, batch_teardown),
+
+    cmocka_unit_test_setup_teardown(test_batch_error_entry_sets_hasError_and_fires_events, batch_setup, batch_teardown),
+
+    cmocka_unit_test_setup_teardown(test_batch_requireLoaded_blocks_until_loaded, batch_setup, batch_teardown),
+    cmocka_unit_test_setup_teardown(test_batch_requireLoaded_returns_error_on_failed_entry, batch_setup, batch_teardown),
+
+    cmocka_unit_test_setup_teardown(test_batch_lock_unlock_adjust_ref_counts, batch_setup, batch_teardown),
+
+    cmocka_unit_test_setup_teardown(test_two_batches_share_one_cached_entry, batch_setup, batch_teardown),
+  };
+  return cmocka_run_group_tests(tests, NULL, NULL);
+}

test/asset/test_assetfile.c

@@ -0,0 +1,395 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "dusktest.h"
+#include "asset/asset.h"
+#include "asset/assetfile.h"
+#include "util/memory.h"
+#include <zip.h>
+
+// ============================================================
+// Fixtures
+// ============================================================
+
+static const char_t *TXT_HELLO = "Hello, World!";
+static const char_t *TXT_LINES = "line one\nline two\r\nline three";
+static const char_t *TXT_LONGLINE = "abcdefghijklmnopqrstuvwxyz\n";
+
+// ============================================================
+// In-memory ZIP
+// ============================================================
+
+static zip_t *g_zip = NULL;
+
+static int file_zip_add(
+  zip_t *za, const char_t *name, const void *data, size_t len
+) {
+  zip_source_t *s = zip_source_buffer(za, data, len, 0);
+  return (int)zip_file_add(za, name, s, ZIP_FL_OVERWRITE);
+}
+
+static int zip_setup(void **state) {
+  zip_error_t err;
+  zip_error_init(&err);
+
+  zip_source_t *write_src = zip_source_buffer_create(NULL, 0, 1, &err);
+  if(!write_src) return -1;
+
+  zip_t *za = zip_open_from_source(write_src, ZIP_TRUNCATE, &err);
+  if(!za) { zip_source_free(write_src); return -1; }
+
+  if(
+    file_zip_add(za, "hello.txt", TXT_HELLO, strlen(TXT_HELLO)) < 0 ||
+    file_zip_add(za, "empty.txt", "", 0) < 0 ||
+    file_zip_add(za, "lines.txt", TXT_LINES, strlen(TXT_LINES)) < 0 ||
+    file_zip_add(za, "longline.txt", TXT_LONGLINE, strlen(TXT_LONGLINE)) < 0
+  ) {
+    zip_close(za); return -1;
+  }
+
+  zip_source_keep(write_src);
+  if(zip_close(za) != 0) { zip_source_free(write_src); return -1; }
+
+  zip_stat_t zs;
+  memset(&zs, 0, sizeof(zs));
+  if(zip_source_stat(write_src, &zs) != 0 || !(zs.valid & ZIP_STAT_SIZE)) {
+    zip_source_free(write_src); return -1;
+  }
+
+  void *zipbuf = malloc((size_t)zs.size);
+  if(!zipbuf) { zip_source_free(write_src); return -1; }
+
+  if(zip_source_open(write_src) != 0) {
+    free(zipbuf); zip_source_free(write_src); return -1;
+  }
+  zip_source_read(write_src, zipbuf, (zip_uint64_t)zs.size);
+  zip_source_close(write_src);
+  zip_source_free(write_src);
+
+  zip_error_init(&err);
+  zip_source_t *read_src = zip_source_buffer_create(
+    zipbuf, (zip_uint64_t)zs.size, 1, &err
+  );
+  if(!read_src) { free(zipbuf); return -1; }
+
+  g_zip = zip_open_from_source(read_src, 0, &err);
+  if(!g_zip) { zip_source_free(read_src); return -1; }
+
+  ASSET.zip = g_zip;
+  return 0;
+}
+
+static int zip_teardown(void **state) {
+  if(g_zip) { zip_close(g_zip); g_zip = NULL; }
+  ASSET.zip = NULL;
+  return 0;
+}
+
+// ============================================================
+// assetFileInit tests
+// ============================================================
+
+static void test_assetFileInit_valid(void **state) {
+  assetfile_t file;
+  errorret_t ret = assetFileInit(&file, "hello.txt", NULL, NULL);
+  assert_true(errorIsOk(ret));
+  assert_int_equal((int)file.size, (int)strlen(TXT_HELLO));
+
+  errorret_t disposeRet = assetFileDispose(&file);
+  assert_true(errorIsOk(disposeRet));
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+static void test_assetFileInit_missing_file(void **state) {
+  assetfile_t file;
+  errorret_t ret = assetFileInit(&file, "nonexistent.txt", NULL, NULL);
+  assert_true(errorIsNotOk(ret));
+  errorCatch(ret);
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+static void test_assetFileInit_zero_size_errors(void **state) {
+  assetfile_t file;
+  errorret_t ret = assetFileInit(&file, "empty.txt", NULL, NULL);
+  assert_true(errorIsNotOk(ret));
+  errorCatch(ret);
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+// ============================================================
+// Open / read / close tests
+// ============================================================
+
+static void test_assetFile_open_read_close(void **state) {
+  assetfile_t file;
+  assetFileInit(&file, "hello.txt", NULL, NULL);
+
+  errorret_t ret = assetFileOpen(&file);
+  assert_true(errorIsOk(ret));
+
+  char_t buf[32];
+  ret = assetFileRead(&file, buf, strlen(TXT_HELLO));
+  assert_true(errorIsOk(ret));
+  buf[strlen(TXT_HELLO)] = '\0';
+  assert_string_equal(buf, TXT_HELLO);
+  assert_int_equal((int)file.position, (int)strlen(TXT_HELLO));
+  assert_int_equal((int)file.lastRead, (int)strlen(TXT_HELLO));
+
+  ret = assetFileClose(&file);
+  assert_true(errorIsOk(ret));
+  assert_null(file.zipFile);
+
+  errorret_t disposeRet = assetFileDispose(&file);
+  assert_true(errorIsOk(disposeRet));
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+static void test_assetFile_read_skip_advances_position_by_exactly_n(
+  void **state
+) {
+  // Regression test: assetFileRead's NULL-buffer skip path used to advance
+  // file->position by 2x the skipped amount (the recursive real-read call
+  // already advances it once, and the skip loop wrongly advanced it again).
+  assetfile_t file;
+  assetFileInit(&file, "hello.txt", NULL, NULL);
+  assetFileOpen(&file);
+
+  errorret_t ret = assetFileRead(&file, NULL, 7);  // skip "Hello, "
+  assert_true(errorIsOk(ret));
+  assert_int_equal((int)file.position, 7);
+  assert_int_equal((int)file.lastRead, 7);
+
+  char_t buf[16];
+  ret = assetFileRead(&file, buf, 6);  // "World!"
+  assert_true(errorIsOk(ret));
+  buf[6] = '\0';
+  assert_string_equal(buf, "World!");
+  assert_int_equal((int)file.position, 13);
+
+  assetFileClose(&file);
+  errorret_t disposeRet = assetFileDispose(&file);
+  assert_true(errorIsOk(disposeRet));
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+static void test_assetFile_skip_spanning_multiple_chunks(void **state) {
+  // The skip loop reads through a 256-byte scratch buffer per chunk; verify
+  // a skip larger than that scratch buffer still lands on the right byte.
+  assetfile_t file;
+  assetFileInit(&file, "longline.txt", NULL, NULL);
+  assetFileOpen(&file);
+
+  // longline.txt is the 26-letter alphabet + '\n' = 27 bytes; skip the
+  // first 25 letters (a..y), leaving "z\n".
+  errorret_t ret = assetFileRead(&file, NULL, 25);
+  assert_true(errorIsOk(ret));
+  assert_int_equal((int)file.position, 25);
+
+  char_t buf[4];
+  ret = assetFileRead(&file, buf, 2);
+  assert_true(errorIsOk(ret));
+  buf[2] = '\0';
+  assert_string_equal(buf, "z\n");
+
+  assetFileClose(&file);
+  errorret_t disposeRet = assetFileDispose(&file);
+  assert_true(errorIsOk(disposeRet));
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+static void test_assetFile_rewind_reads_from_start_again(void **state) {
+  assetfile_t file;
+  assetFileInit(&file, "hello.txt", NULL, NULL);
+  assetFileOpen(&file);
+
+  char_t buf[16];
+  assetFileRead(&file, buf, 5);
+  buf[5] = '\0';
+  assert_string_equal(buf, "Hello");
+
+  errorret_t ret = assetFileRewind(&file);
+  assert_true(errorIsOk(ret));
+  assert_int_equal((int)file.position, 0);
+
+  assetFileRead(&file, buf, 5);
+  buf[5] = '\0';
+  assert_string_equal(buf, "Hello");
+
+  assetFileClose(&file);
+  errorret_t disposeRet = assetFileDispose(&file);
+  assert_true(errorIsOk(disposeRet));
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+static void test_assetFile_rewind_noop_at_start(void **state) {
+  assetfile_t file;
+  assetFileInit(&file, "hello.txt", NULL, NULL);
+  assetFileOpen(&file);
+
+  // Never having read anything, position is already 0 -- rewind must be a
+  // cheap no-op rather than closing/reopening the handle.
+  errorret_t ret = assetFileRewind(&file);
+  assert_true(errorIsOk(ret));
+  assert_non_null(file.zipFile);
+
+  assetFileClose(&file);
+  errorret_t disposeRet = assetFileDispose(&file);
+  assert_true(errorIsOk(disposeRet));
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+static void test_assetFile_dispose_closes_open_handle(void **state) {
+  assetfile_t file;
+  assetFileInit(&file, "hello.txt", NULL, NULL);
+  assetFileOpen(&file);
+
+  errorret_t ret = assetFileDispose(&file);
+  assert_true(errorIsOk(ret));
+  assert_null(file.zipFile);
+  assert_int_equal((int)file.size, 0);
+
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+// ============================================================
+// assetFileReadEntire tests
+// ============================================================
+
+static void test_assetFileReadEntire_reads_full_contents(void **state) {
+  assetfile_t file;
+  assetFileInit(&file, "hello.txt", NULL, NULL);
+
+  uint8_t *buffer = NULL;
+  size_t size = 0;
+  errorret_t ret = assetFileReadEntire(&file, &buffer, &size);
+  assert_true(errorIsOk(ret));
+  assert_non_null(buffer);
+  assert_int_equal((int)size, (int)strlen(TXT_HELLO));
+  assert_memory_equal(buffer, TXT_HELLO, size);
+
+  // The file handle is closed again by the time this returns.
+  assert_null(file.zipFile);
+
+  memoryFree(buffer);
+  errorret_t disposeRet = assetFileDispose(&file);
+  assert_true(errorIsOk(disposeRet));
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+// ============================================================
+// Line reader tests
+// ============================================================
+
+static void test_lineReader_reads_lines_stripping_crlf(void **state) {
+  assetfile_t file;
+  assetFileInit(&file, "lines.txt", NULL, NULL);
+  assetFileOpen(&file);
+
+  uint8_t readBuf[64];
+  uint8_t outBuf[64];
+  assetfilelinereader_t reader;
+  assetFileLineReaderInit(
+    &reader, &file, readBuf, sizeof(readBuf), outBuf, sizeof(outBuf)
+  );
+
+  errorret_t ret = assetFileLineReaderNext(&reader);
+  assert_true(errorIsOk(ret));
+  assert_string_equal((char_t *)outBuf, "line one");
+
+  ret = assetFileLineReaderNext(&reader);
+  assert_true(errorIsOk(ret));
+  assert_string_equal((char_t *)outBuf, "line two");  // \r stripped
+
+  ret = assetFileLineReaderNext(&reader);
+  assert_true(errorIsOk(ret));
+  assert_string_equal((char_t *)outBuf, "line three");  // no trailing \n
+
+  assetFileClose(&file);
+  errorret_t disposeRet = assetFileDispose(&file);
+  assert_true(errorIsOk(disposeRet));
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+static void test_lineReader_next_past_eof_throws(void **state) {
+  assetfile_t file;
+  assetFileInit(&file, "lines.txt", NULL, NULL);
+  assetFileOpen(&file);
+
+  uint8_t readBuf[64];
+  uint8_t outBuf[64];
+  assetfilelinereader_t reader;
+  assetFileLineReaderInit(
+    &reader, &file, readBuf, sizeof(readBuf), outBuf, sizeof(outBuf)
+  );
+
+  assetFileLineReaderNext(&reader);
+  assetFileLineReaderNext(&reader);
+  assetFileLineReaderNext(&reader);  // consumes "line three", the last line
+
+  errorret_t ret = assetFileLineReaderNext(&reader);
+  assert_true(errorIsNotOk(ret));
+  errorCatch(ret);
+
+  assetFileClose(&file);
+  errorret_t disposeRet = assetFileDispose(&file);
+  assert_true(errorIsOk(disposeRet));
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+static void test_lineReader_small_read_buffer_spans_multiple_fills(
+  void **state
+) {
+  // readBuffer is far smaller than the line, forcing assetFileLineReaderFill
+  // to be called repeatedly (and to slide unread bytes down) before the
+  // newline is finally seen.
+  assetfile_t file;
+  assetFileInit(&file, "longline.txt", NULL, NULL);
+  assetFileOpen(&file);
+
+  uint8_t readBuf[4];
+  uint8_t outBuf[64];
+  assetfilelinereader_t reader;
+  assetFileLineReaderInit(
+    &reader, &file, readBuf, sizeof(readBuf), outBuf, sizeof(outBuf)
+  );
+
+  errorret_t ret = assetFileLineReaderNext(&reader);
+  assert_true(errorIsOk(ret));
+  assert_string_equal((char_t *)outBuf, "abcdefghijklmnopqrstuvwxyz");
+
+  assetFileClose(&file);
+  errorret_t disposeRet = assetFileDispose(&file);
+  assert_true(errorIsOk(disposeRet));
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+// ============================================================
+// main
+// ============================================================
+
+int main(void) {
+  assertInit();
+  const struct CMUnitTest tests[] = {
+    cmocka_unit_test_setup_teardown(test_assetFileInit_valid, zip_setup, zip_teardown),
+    cmocka_unit_test_setup_teardown(test_assetFileInit_missing_file, zip_setup, zip_teardown),
+    cmocka_unit_test_setup_teardown(test_assetFileInit_zero_size_errors, zip_setup, zip_teardown),
+
+    cmocka_unit_test_setup_teardown(test_assetFile_open_read_close, zip_setup, zip_teardown),
+    cmocka_unit_test_setup_teardown(test_assetFile_read_skip_advances_position_by_exactly_n, zip_setup, zip_teardown),
+    cmocka_unit_test_setup_teardown(test_assetFile_skip_spanning_multiple_chunks, zip_setup, zip_teardown),
+    cmocka_unit_test_setup_teardown(test_assetFile_rewind_reads_from_start_again, zip_setup, zip_teardown),
+    cmocka_unit_test_setup_teardown(test_assetFile_rewind_noop_at_start, zip_setup, zip_teardown),
+    cmocka_unit_test_setup_teardown(test_assetFile_dispose_closes_open_handle, zip_setup, zip_teardown),
+
+    cmocka_unit_test_setup_teardown(test_assetFileReadEntire_reads_full_contents, zip_setup, zip_teardown),
+
+    cmocka_unit_test_setup_teardown(test_lineReader_reads_lines_stripping_crlf, zip_setup, zip_teardown),
+    cmocka_unit_test_setup_teardown(test_lineReader_next_past_eof_throws, zip_setup, zip_teardown),
+    cmocka_unit_test_setup_teardown(test_lineReader_small_read_buffer_spans_multiple_fills, zip_setup, zip_teardown),
+  };
+  return cmocka_run_group_tests(tests, NULL, NULL);
+}

test/asset/test_assetmeshloader.c

@@ -0,0 +1,331 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "dusktest.h"
+#include "asset/asset.h"
+#include "asset/loader/assetloader.h"
+#include "asset/loader/assetentry.h"
+#include "asset/loader/dmf/assetmeshloader.h"
+#include "display/mesh/meshvertex.h"
+#include "thread/thread.h"
+#include "util/memory.h"
+#include <zip.h>
+#include <string.h>
+
+// ============================================================
+// DMF binary fixtures
+// DMF layout:
+//   [0-2]  magic "DMF"
+//   [3]    pad
+//   [4-7]  version   (uint32 LE)
+//   [8-11] vertCount (uint32 LE)
+//   [12..] vertCount * meshvertex_t {uv[2], pos[3]} (float LE each)
+//
+// meshvertex_t is already {float uv[2]; float pos[3];} in wire order, and
+// this test host is little-endian, so a plain memcpy of real meshvertex_t
+// values reproduces the exact on-disk format -- no manual byte encoding.
+// ============================================================
+
+typedef struct {
+  uint8_t magic[3];
+  uint8_t pad;
+  uint32_t version;
+  uint32_t vertCount;
+} dmfheader_t;
+
+static size_t buildMeshFixture(
+  uint8_t *out,
+  const uint8_t magic[3],
+  uint32_t version,
+  uint32_t vertCount,
+  const meshvertex_t *verts
+) {
+  dmfheader_t header;
+  header.magic[0] = magic[0];
+  header.magic[1] = magic[1];
+  header.magic[2] = magic[2];
+  header.pad = 0;
+  header.version = version;
+  header.vertCount = vertCount;
+
+  memcpy(out, &header, sizeof(header));
+  if(vertCount > 0) {
+    memcpy(out + sizeof(header), verts, vertCount * sizeof(meshvertex_t));
+  }
+  return sizeof(header) + (size_t)vertCount * sizeof(meshvertex_t);
+}
+
+static const uint8_t MAGIC_DMF[3] = { 'D', 'M', 'F' };
+static const uint8_t MAGIC_BAD[3] = { 'X', 'Y', 'Z' };
+
+static const meshvertex_t TWO_VERTS[2] = {
+  { .uv = { 0.25f, 0.75f }, .pos = { 1.0f, 2.0f, 3.0f } },
+  { .uv = { 0.5f, 0.5f }, .pos = { -1.0f, 0.0f, 4.0f } },
+};
+
+// ============================================================
+// Async thread helper
+// ============================================================
+
+typedef struct {
+  assetloading_t *loading;
+  bool_t ok;
+} mesh_async_run_t;
+
+static void mesh_async_thread_cb(thread_t *thread) {
+  mesh_async_run_t *run = (mesh_async_run_t *)thread->data;
+  errorret_t ret = assetMeshLoaderAsync(run->loading);
+  run->ok = errorIsOk(ret);
+  if(errorIsNotOk(ret)) errorCatch(ret);
+}
+
+static bool_t run_mesh_async(assetloading_t *loading) {
+  mesh_async_run_t run = { .loading = loading, .ok = false };
+  thread_t thread;
+  threadInit(&thread, mesh_async_thread_cb);
+  thread.data = &run;
+  threadStart(&thread);
+  threadStop(&thread);
+  return run.ok;
+}
+
+// ============================================================
+// In-memory ZIP
+// ============================================================
+
+static zip_t *g_zip = NULL;
+
+static int mesh_zip_add(
+  zip_t *za, const char_t *name, const void *data, size_t len
+) {
+  zip_source_t *s = zip_source_buffer(za, data, len, 0);
+  return (int)zip_file_add(za, name, s, ZIP_FL_OVERWRITE);
+}
+
+static int zip_setup(void **state) {
+  zip_error_t err;
+  zip_error_init(&err);
+
+  zip_source_t *write_src = zip_source_buffer_create(NULL, 0, 1, &err);
+  if(!write_src) return -1;
+
+  zip_t *za = zip_open_from_source(write_src, ZIP_TRUNCATE, &err);
+  if(!za) { zip_source_free(write_src); return -1; }
+
+  // zip_source_buffer defers reading until zip_close(), so each fixture
+  // needs its own backing buffer -- reusing one scratch buffer across
+  // multiple calls would make every entry read back whatever was written
+  // into it last.
+  static uint8_t bufEmpty[512], bufBadMagic[512], bufBadVersion[512],
+    bufVerts[512];
+  size_t len;
+
+  len = buildMeshFixture(bufEmpty, MAGIC_DMF, ASSET_MESH_FILE_VERSION, 0, NULL);
+  if(mesh_zip_add(za, "empty.mesh", bufEmpty, len) < 0) { zip_close(za); return -1; }
+
+  len = buildMeshFixture(bufBadMagic, MAGIC_BAD, ASSET_MESH_FILE_VERSION, 0, NULL);
+  if(mesh_zip_add(za, "badmagic.mesh", bufBadMagic, len) < 0) { zip_close(za); return -1; }
+
+  len = buildMeshFixture(bufBadVersion, MAGIC_DMF, ASSET_MESH_FILE_VERSION + 1, 0, NULL);
+  if(mesh_zip_add(za, "badversion.mesh", bufBadVersion, len) < 0) { zip_close(za); return -1; }
+
+  len = buildMeshFixture(bufVerts, MAGIC_DMF, ASSET_MESH_FILE_VERSION, 2, TWO_VERTS);
+  if(mesh_zip_add(za, "verts.mesh", bufVerts, len) < 0) { zip_close(za); return -1; }
+
+  zip_source_keep(write_src);
+  if(zip_close(za) != 0) { zip_source_free(write_src); return -1; }
+
+  zip_stat_t zs;
+  memset(&zs, 0, sizeof(zs));
+  if(zip_source_stat(write_src, &zs) != 0 || !(zs.valid & ZIP_STAT_SIZE)) {
+    zip_source_free(write_src); return -1;
+  }
+
+  void *zipbuf = malloc((size_t)zs.size);
+  if(!zipbuf) { zip_source_free(write_src); return -1; }
+
+  if(zip_source_open(write_src) != 0) {
+    free(zipbuf); zip_source_free(write_src); return -1;
+  }
+  zip_source_read(write_src, zipbuf, (zip_uint64_t)zs.size);
+  zip_source_close(write_src);
+  zip_source_free(write_src);
+
+  zip_error_init(&err);
+  zip_source_t *read_src = zip_source_buffer_create(
+    zipbuf, (zip_uint64_t)zs.size, 1, &err
+  );
+  if(!read_src) { free(zipbuf); return -1; }
+
+  g_zip = zip_open_from_source(read_src, 0, &err);
+  if(!g_zip) { zip_source_free(read_src); return -1; }
+
+  ASSET.zip = g_zip;
+  return 0;
+}
+
+static int zip_teardown(void **state) {
+  if(g_zip) { zip_close(g_zip); g_zip = NULL; }
+  ASSET.zip = NULL;
+  return 0;
+}
+
+// ============================================================
+// Loader pipeline helper
+// ============================================================
+
+typedef struct {
+  assetentry_t entry;
+  assetloading_t loading;
+} loader_ctx_t;
+
+static void loader_ctx_init(loader_ctx_t *ctx, const char_t *name) {
+  assetEntryInit(&ctx->entry, name, ASSET_LOADER_TYPE_MESH, NULL);
+  threadMutexInit(&ctx->loading.mutex);
+  memoryZero(&ctx->loading.loading, sizeof(ctx->loading.loading));
+  ctx->loading.type = ASSET_LOADER_TYPE_MESH;
+  ctx->loading.entry = &ctx->entry;
+  ctx->entry.state = ASSET_ENTRY_STATE_PENDING_SYNC;
+}
+
+// Drives sync(INITIAL) -> async(READ_FILE) -> sync(CREATE_MESH). Only safe
+// to call for a fixture with vertCount == 0: any vertCount > 0 would reach
+// the GPU-touching mesh upload in the sync phase, which this headless test
+// binary has no GL context for.
+static errorret_t loader_ctx_run_empty(loader_ctx_t *ctx) {
+  errorret_t ret = assetMeshLoaderSync(&ctx->loading);
+  if(errorIsNotOk(ret)) return ret;
+
+  if(!run_mesh_async(&ctx->loading)) {
+    ctx->entry.state = ASSET_ENTRY_STATE_ERROR;
+    errorThrow("Async mesh load failed");
+  }
+
+  return assetMeshLoaderSync(&ctx->loading);
+}
+
+static void loader_ctx_dispose(loader_ctx_t *ctx) {
+  if(ctx->entry.type != ASSET_LOADER_TYPE_NULL) {
+    errorret_t ret = assetEntryDispose(&ctx->entry);
+    if(errorIsNotOk(ret)) errorCatch(ret);
+  }
+  threadMutexDispose(&ctx->loading.mutex);
+}
+
+// ============================================================
+// Tests
+// ============================================================
+
+static void test_mesh_zero_vertices_full_roundtrip_skips_gpu(void **state) {
+  loader_ctx_t ctx;
+  loader_ctx_init(&ctx, "empty.mesh");
+
+  errorret_t ret = loader_ctx_run_empty(&ctx);
+  assert_true(errorIsOk(ret));
+  assert_int_equal(ctx.entry.state, ASSET_ENTRY_STATE_LOADED);
+
+  assetmeshoutput_t *out = &ctx.entry.data.mesh;
+  assert_false(out->meshInitialized);
+  assert_null(out->vertices);
+
+  loader_ctx_dispose(&ctx);
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+static void test_mesh_bad_magic_errors(void **state) {
+  loader_ctx_t ctx;
+  loader_ctx_init(&ctx, "badmagic.mesh");
+
+  errorret_t ret = assetMeshLoaderSync(&ctx.loading);
+  assert_true(errorIsOk(ret));
+  assert_false(run_mesh_async(&ctx.loading));
+
+  assert_int_equal(ctx.entry.state, ASSET_ENTRY_STATE_ERROR);
+  loader_ctx_dispose(&ctx);
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+static void test_mesh_bad_version_errors(void **state) {
+  loader_ctx_t ctx;
+  loader_ctx_init(&ctx, "badversion.mesh");
+
+  errorret_t ret = assetMeshLoaderSync(&ctx.loading);
+  assert_true(errorIsOk(ret));
+  assert_false(run_mesh_async(&ctx.loading));
+
+  assert_int_equal(ctx.entry.state, ASSET_ENTRY_STATE_ERROR);
+  loader_ctx_dispose(&ctx);
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+static void test_mesh_missing_file_errors(void **state) {
+  loader_ctx_t ctx;
+  loader_ctx_init(&ctx, "nonexistent.mesh");
+
+  errorret_t ret = assetMeshLoaderSync(&ctx.loading);
+  assert_true(errorIsOk(ret));
+  assert_false(run_mesh_async(&ctx.loading));
+
+  assert_int_equal(ctx.entry.state, ASSET_ENTRY_STATE_ERROR);
+  loader_ctx_dispose(&ctx);
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+static void test_mesh_async_parses_vertices_and_endian(void **state) {
+  // Only drives the async (file-read/parse) phase -- the sync phase for a
+  // non-zero vertex count would upload to the GPU, which this headless
+  // test binary can't do.
+  loader_ctx_t ctx;
+  loader_ctx_init(&ctx, "verts.mesh");
+
+  errorret_t ret = assetMeshLoaderSync(&ctx.loading);  // arms READ_FILE state
+  assert_true(errorIsOk(ret));
+
+  assert_true(run_mesh_async(&ctx.loading));
+
+  assert_int_equal((int)ctx.loading.loading.mesh.vertCount, 2);
+  assert_int_equal(ctx.entry.state, ASSET_ENTRY_STATE_PENDING_SYNC);
+  assert_int_equal(
+    ctx.loading.loading.mesh.state, ASSET_MESH_LOADING_STATE_CREATE_MESH
+  );
+
+  meshvertex_t *parsed = (meshvertex_t *)ctx.loading.loading.mesh.data;
+  assert_non_null(parsed);
+  assert_float_equal(parsed[0].uv[0], 0.25f, 0.0001f);
+  assert_float_equal(parsed[0].uv[1], 0.75f, 0.0001f);
+  assert_float_equal(parsed[0].pos[0], 1.0f, 0.0001f);
+  assert_float_equal(parsed[0].pos[1], 2.0f, 0.0001f);
+  assert_float_equal(parsed[0].pos[2], 3.0f, 0.0001f);
+  assert_float_equal(parsed[1].uv[0], 0.5f, 0.0001f);
+  assert_float_equal(parsed[1].pos[2], 4.0f, 0.0001f);
+
+  // Never reached the sync/GPU phase, so the parsed buffer is still owned
+  // by the loading slot (entry->data.mesh.vertices is still NULL) -- free
+  // it manually before disposing, since assetMeshDispose only knows about
+  // the entry-owned copy.
+  memoryFree(ctx.loading.loading.mesh.data);
+  ctx.loading.loading.mesh.data = NULL;
+
+  loader_ctx_dispose(&ctx);
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+// ============================================================
+// main
+// ============================================================
+
+int main(void) {
+  assertInit();
+  const struct CMUnitTest tests[] = {
+    cmocka_unit_test_setup_teardown(test_mesh_zero_vertices_full_roundtrip_skips_gpu, zip_setup, zip_teardown),
+    cmocka_unit_test_setup_teardown(test_mesh_bad_magic_errors, zip_setup, zip_teardown),
+    cmocka_unit_test_setup_teardown(test_mesh_bad_version_errors, zip_setup, zip_teardown),
+    cmocka_unit_test_setup_teardown(test_mesh_missing_file_errors, zip_setup, zip_teardown),
+    cmocka_unit_test_setup_teardown(test_mesh_async_parses_vertices_and_endian, zip_setup, zip_teardown),
+  };
+  return cmocka_run_group_tests(tests, NULL, NULL);
+}

test/asset/test_assetmodelloader.c

@@ -0,0 +1,281 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "dusktest.h"
+#include "asset/asset.h"
+#include "asset/loader/assetloader.h"
+#include "asset/loader/assetentry.h"
+#include "asset/loader/dmf/assetmodelloader.h"
+#include "asset/loader/dmf/assetmeshloader.h"
+#include "display/mesh/meshvertex.h"
+#include "display/color.h"
+#include "util/memory.h"
+#include <zip.h>
+#include <string.h>
+
+// ============================================================
+// This drives the REAL asset system end-to-end (real background loading
+// thread, real JSON/MESH/MODEL loaders) rather than hand-stepping a single
+// loader. assetModelLoaderSync blocks on assetRequireLoaded for its JSON
+// and mesh sub-entries, which only resolves if something is actually
+// servicing ASSET_ENTRY_STATE_PENDING_ASYNC on a separate thread -- exactly
+// like production. Every mesh fixture uses vertCount == 0 so the mesh's
+// own sync phase never touches the GPU.
+// ============================================================
+
+typedef struct {
+  uint8_t magic[3];
+  uint8_t pad;
+  uint32_t version;
+  uint32_t vertCount;
+} dmfheader_t;
+
+static size_t buildEmptyMeshFixture(uint8_t *out) {
+  dmfheader_t header = {
+    .magic = { 'D', 'M', 'F' }, .pad = 0,
+    .version = ASSET_MESH_FILE_VERSION, .vertCount = 0,
+  };
+  memcpy(out, &header, sizeof(header));
+  return sizeof(header);
+}
+
+static const char_t *JSON_VALID = "{\"mesh\":\"shared.mesh\"}";
+static const char_t *JSON_WITH_COLOR =
+  "{\"mesh\":\"shared.mesh\",\"color\":[10,20,30,40]}";
+static const char_t *JSON_MISSING_MESH_FIELD = "{\"notmesh\":\"x\"}";
+static const char_t *JSON_MESH_NOT_FOUND = "{\"mesh\":\"nonexistent.mesh\"}";
+
+static zip_t *g_zip = NULL;
+
+static int model_zip_add(
+  zip_t *za, const char_t *name, const void *data, size_t len
+) {
+  zip_source_t *s = zip_source_buffer(za, data, len, 0);
+  return (int)zip_file_add(za, name, s, ZIP_FL_OVERWRITE);
+}
+
+static int model_setup(void **state) {
+  zip_error_t err;
+  zip_error_init(&err);
+
+  zip_source_t *write_src = zip_source_buffer_create(NULL, 0, 1, &err);
+  if(!write_src) return -1;
+
+  zip_t *za = zip_open_from_source(write_src, ZIP_TRUNCATE, &err);
+  if(!za) { zip_source_free(write_src); return -1; }
+
+  static uint8_t meshBuf[64];
+  size_t meshLen = buildEmptyMeshFixture(meshBuf);
+
+  if(
+    model_zip_add(za, "shared.mesh", meshBuf, meshLen) < 0 ||
+    model_zip_add(za, "valid.model", JSON_VALID, strlen(JSON_VALID)) < 0 ||
+    model_zip_add(za, "color.model", JSON_WITH_COLOR, strlen(JSON_WITH_COLOR)) < 0 ||
+    model_zip_add(za, "nomeshfield.model", JSON_MISSING_MESH_FIELD, strlen(JSON_MISSING_MESH_FIELD)) < 0 ||
+    model_zip_add(za, "meshnotfound.model", JSON_MESH_NOT_FOUND, strlen(JSON_MESH_NOT_FOUND)) < 0 ||
+    model_zip_add(za, "modelA.model", JSON_VALID, strlen(JSON_VALID)) < 0 ||
+    model_zip_add(za, "modelB.model", JSON_VALID, strlen(JSON_VALID)) < 0
+  ) {
+    zip_close(za); return -1;
+  }
+
+  zip_source_keep(write_src);
+  if(zip_close(za) != 0) { zip_source_free(write_src); return -1; }
+
+  zip_stat_t zs;
+  memset(&zs, 0, sizeof(zs));
+  if(zip_source_stat(write_src, &zs) != 0 || !(zs.valid & ZIP_STAT_SIZE)) {
+    zip_source_free(write_src); return -1;
+  }
+
+  void *zipbuf = malloc((size_t)zs.size);
+  if(!zipbuf) { zip_source_free(write_src); return -1; }
+
+  if(zip_source_open(write_src) != 0) {
+    free(zipbuf); zip_source_free(write_src); return -1;
+  }
+  zip_source_read(write_src, zipbuf, (zip_uint64_t)zs.size);
+  zip_source_close(write_src);
+  zip_source_free(write_src);
+
+  zip_error_init(&err);
+  zip_source_t *read_src = zip_source_buffer_create(
+    zipbuf, (zip_uint64_t)zs.size, 1, &err
+  );
+  if(!read_src) { free(zipbuf); return -1; }
+
+  g_zip = zip_open_from_source(read_src, 0, &err);
+  if(!g_zip) { zip_source_free(read_src); return -1; }
+
+  memoryZero(&ASSET, sizeof(ASSET));
+  ASSET.zip = g_zip;
+  for(size_t i = 0; i < ASSET_LOADING_COUNT_MAX; i++) {
+    threadMutexInit(&ASSET.loading[i].mutex);
+  }
+  threadInit(&ASSET.loadThread, assetUpdateAsync);
+  threadStart(&ASSET.loadThread);
+
+  return 0;
+}
+
+static int model_teardown(void **state) {
+  threadStop(&ASSET.loadThread);
+
+  for(int i = 0; i < ASSET_ENTRY_COUNT_MAX; i++) {
+    if(ASSET.entries[i].type != ASSET_LOADER_TYPE_NULL) {
+      errorret_t ret = assetEntryDispose(&ASSET.entries[i]);
+      if(errorIsNotOk(ret)) errorCatch(ret);
+    }
+  }
+
+  for(size_t i = 0; i < ASSET_LOADING_COUNT_MAX; i++) {
+    threadMutexDispose(&ASSET.loading[i].mutex);
+  }
+
+  if(g_zip) { zip_close(g_zip); g_zip = NULL; }
+  ASSET.zip = NULL;
+  memoryZero(&ASSET, sizeof(ASSET));
+  return 0;
+}
+
+// ============================================================
+// Tests
+// ============================================================
+
+static void test_model_valid_loads_mesh_with_default_color(void **state) {
+  assetentry_t *model = assetLock(
+    "valid.model", ASSET_LOADER_TYPE_MODEL, NULL
+  );
+
+  errorret_t ret = assetRequireLoaded(model);
+  assert_true(errorIsOk(ret));
+  assert_int_equal(model->state, ASSET_ENTRY_STATE_LOADED);
+
+  assetmodeloutput_t *out = &model->data.model;
+  assert_non_null(out->meshEntry);
+  assert_int_equal(out->meshEntry->state, ASSET_ENTRY_STATE_LOADED);
+  assert_null(out->texEntry);
+  assert_int_equal((int)out->color.r, (int)COLOR_WHITE.r);
+  assert_int_equal((int)out->color.g, (int)COLOR_WHITE.g);
+  assert_int_equal((int)out->color.b, (int)COLOR_WHITE.b);
+  assert_int_equal((int)out->color.a, (int)COLOR_WHITE.a);
+
+  assetUnlockEntry(model);
+  errorret_t reapRet = assetReapUnused();
+  assert_true(errorIsOk(reapRet));
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+static void test_model_parses_optional_color(void **state) {
+  assetentry_t *model = assetLock(
+    "color.model", ASSET_LOADER_TYPE_MODEL, NULL
+  );
+
+  errorret_t ret = assetRequireLoaded(model);
+  assert_true(errorIsOk(ret));
+
+  assetmodeloutput_t *out = &model->data.model;
+  assert_int_equal((int)out->color.r, 10);
+  assert_int_equal((int)out->color.g, 20);
+  assert_int_equal((int)out->color.b, 30);
+  assert_int_equal((int)out->color.a, 40);
+
+  assetUnlockEntry(model);
+  errorret_t reapRet = assetReapUnused();
+  assert_true(errorIsOk(reapRet));
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+static void test_model_missing_mesh_field_errors(void **state) {
+  assetentry_t *model = assetLock(
+    "nomeshfield.model", ASSET_LOADER_TYPE_MODEL, NULL
+  );
+
+  errorret_t ret = assetRequireLoaded(model);
+  assert_true(errorIsNotOk(ret));
+  errorCatch(ret);
+  assert_int_equal(model->state, ASSET_ENTRY_STATE_ERROR);
+
+  assetUnlockEntry(model);
+  errorret_t reapRet = assetReapUnused();
+  assert_true(errorIsOk(reapRet));
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+static void test_model_mesh_not_found_errors(void **state) {
+  assetentry_t *model = assetLock(
+    "meshnotfound.model", ASSET_LOADER_TYPE_MODEL, NULL
+  );
+
+  errorret_t ret = assetRequireLoaded(model);
+  assert_true(errorIsNotOk(ret));
+  errorCatch(ret);
+  assert_int_equal(model->state, ASSET_ENTRY_STATE_ERROR);
+
+  assetUnlockEntry(model);
+  errorret_t reapRet = assetReapUnused();
+  assert_true(errorIsOk(reapRet));
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+// ------------------------------------------------------------
+// Caching: two models sharing one mesh sub-asset
+// ------------------------------------------------------------
+
+static void test_two_models_share_one_cached_mesh(void **state) {
+  assetentry_t *modelA = assetLock(
+    "modelA.model", ASSET_LOADER_TYPE_MODEL, NULL
+  );
+  assetentry_t *modelB = assetLock(
+    "modelB.model", ASSET_LOADER_TYPE_MODEL, NULL
+  );
+
+  errorret_t retA = assetRequireLoaded(modelA);
+  assert_true(errorIsOk(retA));
+  errorret_t retB = assetRequireLoaded(modelB);
+  assert_true(errorIsOk(retB));
+
+  assetentry_t *meshA = modelA->data.model.meshEntry;
+  assetentry_t *meshB = modelB->data.model.meshEntry;
+
+  // Both models reference "shared.mesh" -- the asset cache must have
+  // dedupe'd this to a single loaded entry, not two independent loads.
+  assert_ptr_equal(meshA, meshB);
+  assert_int_equal((int)meshA->refs.count, 2);
+
+  // Disposing modelA must release its lock on the shared mesh but leave the
+  // mesh itself intact, since modelB still holds a reference to it.
+  assetUnlockEntry(modelA);
+  errorret_t reapRet = assetReapUnused();
+  assert_true(errorIsOk(reapRet));
+  assert_int_equal((int)meshB->type, (int)ASSET_LOADER_TYPE_MESH);
+  assert_int_equal((int)meshB->refs.count, 1);
+  assert_int_equal(meshB->state, ASSET_ENTRY_STATE_LOADED);
+
+  // Now release the second model too -- the mesh becomes reapable.
+  assetUnlockEntry(modelB);
+  reapRet = assetReapUnused();
+  assert_true(errorIsOk(reapRet));
+
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+// ============================================================
+// main
+// ============================================================
+
+int main(void) {
+  assertInit();
+  const struct CMUnitTest tests[] = {
+    cmocka_unit_test_setup_teardown(test_model_valid_loads_mesh_with_default_color, model_setup, model_teardown),
+    cmocka_unit_test_setup_teardown(test_model_parses_optional_color, model_setup, model_teardown),
+    cmocka_unit_test_setup_teardown(test_model_missing_mesh_field_errors, model_setup, model_teardown),
+    cmocka_unit_test_setup_teardown(test_model_mesh_not_found_errors, model_setup, model_teardown),
+    cmocka_unit_test_setup_teardown(test_two_models_share_one_cached_mesh, model_setup, model_teardown),
+  };
+  return cmocka_run_group_tests(tests, NULL, NULL);
+}

test/asset/test_assettextureloader.c

@@ -0,0 +1,264 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "dusktest.h"
+#include "asset/asset.h"
+#include "asset/loader/assetloader.h"
+#include "asset/loader/assetentry.h"
+#include "asset/loader/display/assettextureloader.h"
+#include "thread/thread.h"
+#include "util/memory.h"
+#include "stb_image.h"
+#include <zip.h>
+
+// ============================================================
+// BMP fixture: a 2x2, 24-bit, uncompressed bottom-up bitmap. stb_image
+// supports BMP directly with no compression to hand-roll, unlike PNG/JPEG.
+// Every pixel is BGR (50, 100, 200) -> after the loader forces a 4-channel
+// (RGBA) decode, every texel should read back as (200, 100, 50, 255).
+//
+// BITMAPFILEHEADER (14 bytes) + BITMAPINFOHEADER (40 bytes) + pixel data
+// (2 rows x (2px * 3B + 2B row padding) = 16 bytes) = 70 bytes total.
+// ============================================================
+
+static const uint8_t BMP_VALID[] = {
+  // BITMAPFILEHEADER
+  'B', 'M',
+  70, 0, 0, 0,    // file size
+  0, 0, 0, 0,     // reserved
+  54, 0, 0, 0,    // pixel data offset
+
+  // BITMAPINFOHEADER
+  40, 0, 0, 0,    // header size
+  2, 0, 0, 0,     // width
+  2, 0, 0, 0,     // height (positive = bottom-up)
+  1, 0,           // planes
+  24, 0,          // bit count
+  0, 0, 0, 0,     // compression = BI_RGB
+  0, 0, 0, 0,     // image size (unused for BI_RGB)
+  0, 0, 0, 0,     // x pixels/meter
+  0, 0, 0, 0,     // y pixels/meter
+  0, 0, 0, 0,     // colors used
+  0, 0, 0, 0,     // colors important
+
+  // Pixel data, 2 rows of 2 BGR pixels + row padding to a 4-byte multiple.
+  50, 100, 200, 50, 100, 200, 0, 0,
+  50, 100, 200, 50, 100, 200, 0, 0,
+};
+
+static const uint8_t GARBAGE_DATA[] = {
+  0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+};
+
+// ============================================================
+// Async thread helper
+// ============================================================
+
+typedef struct {
+  assetloading_t *loading;
+  bool_t ok;
+} texture_async_run_t;
+
+static void texture_async_thread_cb(thread_t *thread) {
+  texture_async_run_t *run = (texture_async_run_t *)thread->data;
+  errorret_t ret = assetTextureLoaderAsync(run->loading);
+  run->ok = errorIsOk(ret);
+  if(errorIsNotOk(ret)) errorCatch(ret);
+}
+
+static bool_t run_texture_async(assetloading_t *loading) {
+  texture_async_run_t run = { .loading = loading, .ok = false };
+  thread_t thread;
+  threadInit(&thread, texture_async_thread_cb);
+  thread.data = &run;
+  threadStart(&thread);
+  threadStop(&thread);
+  return run.ok;
+}
+
+// ============================================================
+// In-memory ZIP
+// ============================================================
+
+static zip_t *g_zip = NULL;
+
+static int texture_zip_add(
+  zip_t *za, const char_t *name, const void *data, size_t len
+) {
+  zip_source_t *s = zip_source_buffer(za, data, len, 0);
+  return (int)zip_file_add(za, name, s, ZIP_FL_OVERWRITE);
+}
+
+static int zip_setup(void **state) {
+  zip_error_t err;
+  zip_error_init(&err);
+
+  zip_source_t *write_src = zip_source_buffer_create(NULL, 0, 1, &err);
+  if(!write_src) return -1;
+
+  zip_t *za = zip_open_from_source(write_src, ZIP_TRUNCATE, &err);
+  if(!za) { zip_source_free(write_src); return -1; }
+
+  if(
+    texture_zip_add(za, "valid.bmp", BMP_VALID, sizeof(BMP_VALID)) < 0 ||
+    texture_zip_add(za, "garbage.bmp", GARBAGE_DATA, sizeof(GARBAGE_DATA)) < 0
+  ) {
+    zip_close(za); return -1;
+  }
+
+  zip_source_keep(write_src);
+  if(zip_close(za) != 0) { zip_source_free(write_src); return -1; }
+
+  zip_stat_t zs;
+  memset(&zs, 0, sizeof(zs));
+  if(zip_source_stat(write_src, &zs) != 0 || !(zs.valid & ZIP_STAT_SIZE)) {
+    zip_source_free(write_src); return -1;
+  }
+
+  void *zipbuf = malloc((size_t)zs.size);
+  if(!zipbuf) { zip_source_free(write_src); return -1; }
+
+  if(zip_source_open(write_src) != 0) {
+    free(zipbuf); zip_source_free(write_src); return -1;
+  }
+  zip_source_read(write_src, zipbuf, (zip_uint64_t)zs.size);
+  zip_source_close(write_src);
+  zip_source_free(write_src);
+
+  zip_error_init(&err);
+  zip_source_t *read_src = zip_source_buffer_create(
+    zipbuf, (zip_uint64_t)zs.size, 1, &err
+  );
+  if(!read_src) { free(zipbuf); return -1; }
+
+  g_zip = zip_open_from_source(read_src, 0, &err);
+  if(!g_zip) { zip_source_free(read_src); return -1; }
+
+  ASSET.zip = g_zip;
+  return 0;
+}
+
+static int zip_teardown(void **state) {
+  if(g_zip) { zip_close(g_zip); g_zip = NULL; }
+  ASSET.zip = NULL;
+  return 0;
+}
+
+// ============================================================
+// Loader pipeline helper
+// ============================================================
+
+typedef struct {
+  assetentry_t entry;
+  assetloading_t loading;
+} loader_ctx_t;
+
+static void loader_ctx_init(loader_ctx_t *ctx, const char_t *name) {
+  assetloaderinput_t input;
+  memoryZero(&input, sizeof(input));
+  input.texture = TEXTURE_FORMAT_RGBA;
+
+  assetEntryInit(&ctx->entry, name, ASSET_LOADER_TYPE_TEXTURE, &input);
+  threadMutexInit(&ctx->loading.mutex);
+  memoryZero(&ctx->loading.loading, sizeof(ctx->loading.loading));
+  ctx->loading.type = ASSET_LOADER_TYPE_TEXTURE;
+  ctx->loading.entry = &ctx->entry;
+  ctx->entry.state = ASSET_ENTRY_STATE_PENDING_SYNC;
+}
+
+// None of the tests below ever reach the sync/GPU phase (see the file-level
+// comment), so entry->data.texture.id is always still 0. Unlike
+// assetMeshDispose (which checks meshInitialized first), assetTextureDispose
+// unconditionally calls textureDispose(), which asserts on a zero id -- so
+// this deliberately routes around the real per-type disposer rather than
+// crash on it; there's nothing else that needs freeing in that case.
+static void loader_ctx_dispose_incomplete(loader_ctx_t *ctx) {
+  memoryZero(&ctx->entry, sizeof(ctx->entry));
+  threadMutexDispose(&ctx->loading.mutex);
+}
+
+// ============================================================
+// Tests
+//
+// Only the async (decode) phase is exercised here: the sync phase's
+// ASSET_TEXTURE_LOADING_STATE_CREATE_TEXTURE branch uploads to the GPU via
+// textureInit(), which this headless test binary has no GL context for.
+// ============================================================
+
+static void test_texture_valid_decodes_pixels(void **state) {
+  loader_ctx_t ctx;
+  loader_ctx_init(&ctx, "valid.bmp");
+
+  errorret_t ret = assetTextureLoaderSync(&ctx.loading);  // arms LOAD_PIXELS
+  assert_true(errorIsOk(ret));
+
+  assert_true(run_texture_async(&ctx.loading));
+
+  assert_int_equal(ctx.loading.loading.texture.width, 2);
+  assert_int_equal(ctx.loading.loading.texture.height, 2);
+  assert_int_equal(ctx.entry.state, ASSET_ENTRY_STATE_PENDING_SYNC);
+  assert_int_equal(
+    ctx.loading.loading.texture.state, ASSET_TEXTURE_LOADING_STATE_CREATE_TEXTURE
+  );
+
+  uint8_t *pixels = ctx.loading.loading.texture.data;
+  assert_non_null(pixels);
+  // Forced 4-channel (RGBA) decode of a BGR(50,100,200) source pixel.
+  assert_int_equal(pixels[0], 200);
+  assert_int_equal(pixels[1], 100);
+  assert_int_equal(pixels[2], 50);
+  assert_int_equal(pixels[3], 255);
+
+  // Never reached the sync/GPU phase -- free the decoded buffer manually.
+  stbi_image_free(pixels);
+  ctx.loading.loading.texture.data = NULL;
+
+  loader_ctx_dispose_incomplete(&ctx);
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+static void test_texture_corrupt_data_errors(void **state) {
+  loader_ctx_t ctx;
+  loader_ctx_init(&ctx, "garbage.bmp");
+
+  errorret_t ret = assetTextureLoaderSync(&ctx.loading);
+  assert_true(errorIsOk(ret));
+
+  assert_false(run_texture_async(&ctx.loading));
+  assert_int_equal(ctx.entry.state, ASSET_ENTRY_STATE_ERROR);
+
+  loader_ctx_dispose_incomplete(&ctx);
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+static void test_texture_missing_file_errors(void **state) {
+  loader_ctx_t ctx;
+  loader_ctx_init(&ctx, "nonexistent.bmp");
+
+  errorret_t ret = assetTextureLoaderSync(&ctx.loading);
+  assert_true(errorIsOk(ret));
+
+  assert_false(run_texture_async(&ctx.loading));
+  assert_int_equal(ctx.entry.state, ASSET_ENTRY_STATE_ERROR);
+
+  loader_ctx_dispose_incomplete(&ctx);
+  assert_int_equal(memoryGetAllocatedCount(), 0);
+}
+
+// ============================================================
+// main
+// ============================================================
+
+int main(void) {
+  assertInit();
+  const struct CMUnitTest tests[] = {
+    cmocka_unit_test_setup_teardown(test_texture_valid_decodes_pixels, zip_setup, zip_teardown),
+    cmocka_unit_test_setup_teardown(test_texture_corrupt_data_errors, zip_setup, zip_teardown),
+    cmocka_unit_test_setup_teardown(test_texture_missing_file_errors, zip_setup, zip_teardown),
+  };
+  return cmocka_run_group_tests(tests, NULL, NULL);
+}

test/event/CMakeLists.txt

@@ -0,0 +1,8 @@
+# Copyright (c) 2026 Dominic Masters
+#
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+include(dusktest)
+
+dusktest(test_event.c)

test/event/test_event.c

@@ -0,0 +1,221 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ *
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "dusktest.h"
+#include "event/event.h"
+
+#define TEST_EVENT_MAX 4
+
+static void incrementCallback(void *params, void *user) {
+  (*(int32_t *)user)++;
+}
+
+static void recordingCallback(void *params, void *user) {
+  *(void **)user = params;
+}
+
+// ============================================================
+// eventInit
+// ============================================================
+
+static void test_eventInit_clears_state(void **state) {
+  eventcallback_t callbacks[TEST_EVENT_MAX];
+  void *users[TEST_EVENT_MAX];
+  event_t event;
+
+  eventInit(&event, callbacks, users, TEST_EVENT_MAX);
+
+  assert_int_equal((int)event.count, 0);
+  assert_int_equal((int)event.size, TEST_EVENT_MAX);
+  assert_ptr_equal(event.callbacks, callbacks);
+  assert_ptr_equal(event.users, users);
+}
+
+// ============================================================
+// eventSubscribe / eventInvoke
+// ============================================================
+
+static void test_subscribe_and_invoke_single(void **state) {
+  eventcallback_t callbacks[TEST_EVENT_MAX];
+  void *users[TEST_EVENT_MAX];
+  event_t event;
+  eventInit(&event, callbacks, users, TEST_EVENT_MAX);
+
+  int32_t counter = 0;
+  eventSubscribe(&event, incrementCallback, &counter);
+
+  eventInvoke(&event, NULL);
+  assert_int_equal(counter, 1);
+
+  eventInvoke(&event, NULL);
+  assert_int_equal(counter, 2);
+}
+
+static void test_invoke_passes_params_through(void **state) {
+  eventcallback_t callbacks[TEST_EVENT_MAX];
+  void *users[TEST_EVENT_MAX];
+  event_t event;
+  eventInit(&event, callbacks, users, TEST_EVENT_MAX);
+
+  void *seenParams = NULL;
+  eventSubscribe(&event, recordingCallback, &seenParams);
+
+  int32_t sentinel = 0;
+  eventInvoke(&event, &sentinel);
+  assert_ptr_equal(seenParams, &sentinel);
+}
+
+static void test_subscribe_multiple_distinct_callbacks(void **state) {
+  eventcallback_t callbacks[TEST_EVENT_MAX];
+  void *users[TEST_EVENT_MAX];
+  event_t event;
+  eventInit(&event, callbacks, users, TEST_EVENT_MAX);
+
+  int32_t counterA = 0, counterB = 0;
+  eventSubscribe(&event, incrementCallback, &counterA);
+  eventSubscribe(&event, incrementCallback, &counterB);
+
+  eventInvoke(&event, NULL);
+  assert_int_equal(counterA, 1);
+  assert_int_equal(counterB, 1);
+}
+
+// This is the exact shape assetbatch.c relies on: two independent owners
+// (e.g. two assetbatch_t's) both waiting on the same cached/shared asset
+// entry subscribe the SAME callback function, distinguished only by a
+// different `user` pointer. Before the fix, eventSubscribe's dedup check
+// matched on callback alone and would assertUnreachable() here.
+static void test_subscribe_same_callback_different_users_both_fire(
+  void **state
+) {
+  eventcallback_t callbacks[TEST_EVENT_MAX];
+  void *users[TEST_EVENT_MAX];
+  event_t event;
+  eventInit(&event, callbacks, users, TEST_EVENT_MAX);
+
+  int32_t counterA = 0, counterB = 0;
+  eventSubscribe(&event, incrementCallback, &counterA);
+  eventSubscribe(&event, incrementCallback, &counterB);
+  assert_int_equal((int)event.count, 2);
+
+  eventInvoke(&event, NULL);
+  assert_int_equal(counterA, 1);
+  assert_int_equal(counterB, 1);
+}
+
+static void test_subscribe_duplicate_pair_asserts(void **state) {
+  eventcallback_t callbacks[TEST_EVENT_MAX];
+  void *users[TEST_EVENT_MAX];
+  event_t event;
+  eventInit(&event, callbacks, users, TEST_EVENT_MAX);
+
+  int32_t counter = 0;
+  eventSubscribe(&event, incrementCallback, &counter);
+
+  // Same (callback, user) pair a second time must still assert.
+  expect_assert_failure(eventSubscribe(&event, incrementCallback, &counter));
+}
+
+static void test_subscribe_capacity_exceeded_asserts(void **state) {
+  eventcallback_t callbacks[1];
+  void *users[1];
+  event_t event;
+  eventInit(&event, callbacks, users, 1);
+
+  int32_t counterA = 0, counterB = 0;
+  eventSubscribe(&event, incrementCallback, &counterA);
+
+  expect_assert_failure(eventSubscribe(&event, incrementCallback, &counterB));
+}
+
+// ============================================================
+// eventUnsubscribe
+// ============================================================
+
+static void test_unsubscribe_removes_only_matching_pair(void **state) {
+  eventcallback_t callbacks[TEST_EVENT_MAX];
+  void *users[TEST_EVENT_MAX];
+  event_t event;
+  eventInit(&event, callbacks, users, TEST_EVENT_MAX);
+
+  int32_t counterA = 0, counterB = 0;
+  eventSubscribe(&event, incrementCallback, &counterA);
+  eventSubscribe(&event, incrementCallback, &counterB);
+
+  // Unsubscribing A's registration must not disturb B's, even though they
+  // share the same callback function pointer.
+  eventUnsubscribe(&event, incrementCallback, &counterA);
+  assert_int_equal((int)event.count, 1);
+
+  eventInvoke(&event, NULL);
+  assert_int_equal(counterA, 0);
+  assert_int_equal(counterB, 1);
+}
+
+static void test_unsubscribe_nonexistent_pair_is_noop(void **state) {
+  eventcallback_t callbacks[TEST_EVENT_MAX];
+  void *users[TEST_EVENT_MAX];
+  event_t event;
+  eventInit(&event, callbacks, users, TEST_EVENT_MAX);
+
+  int32_t counterA = 0, counterB = 0;
+  eventSubscribe(&event, incrementCallback, &counterA);
+
+  // Same callback, but a user pointer that was never subscribed.
+  eventUnsubscribe(&event, incrementCallback, &counterB);
+  assert_int_equal((int)event.count, 1);
+
+  eventInvoke(&event, NULL);
+  assert_int_equal(counterA, 1);
+}
+
+static void test_unsubscribe_from_middle_keeps_remaining_working(
+  void **state
+) {
+  eventcallback_t callbacks[TEST_EVENT_MAX];
+  void *users[TEST_EVENT_MAX];
+  event_t event;
+  eventInit(&event, callbacks, users, TEST_EVENT_MAX);
+
+  int32_t counterA = 0, counterB = 0, counterC = 0;
+  eventSubscribe(&event, incrementCallback, &counterA);
+  eventSubscribe(&event, incrementCallback, &counterB);
+  eventSubscribe(&event, incrementCallback, &counterC);
+
+  // Removing the middle subscriber swaps the last slot into its place;
+  // verify every remaining subscriber still fires exactly once.
+  eventUnsubscribe(&event, incrementCallback, &counterB);
+  assert_int_equal((int)event.count, 2);
+
+  eventInvoke(&event, NULL);
+  assert_int_equal(counterA, 1);
+  assert_int_equal(counterB, 0);
+  assert_int_equal(counterC, 1);
+}
+
+// ============================================================
+// main
+// ============================================================
+
+int main(void) {
+  assertInit();
+  const struct CMUnitTest tests[] = {
+    cmocka_unit_test(test_eventInit_clears_state),
+
+    cmocka_unit_test(test_subscribe_and_invoke_single),
+    cmocka_unit_test(test_invoke_passes_params_through),
+    cmocka_unit_test(test_subscribe_multiple_distinct_callbacks),
+    cmocka_unit_test(test_subscribe_same_callback_different_users_both_fire),
+    cmocka_unit_test(test_subscribe_duplicate_pair_asserts),
+    cmocka_unit_test(test_subscribe_capacity_exceeded_asserts),
+
+    cmocka_unit_test(test_unsubscribe_removes_only_matching_pair),
+    cmocka_unit_test(test_unsubscribe_nonexistent_pair_is_noop),
+    cmocka_unit_test(test_unsubscribe_from_middle_keeps_remaining_working),
+  };
+  return cmocka_run_group_tests(tests, NULL, NULL);
+}

test/script/CMakeLists.txt

@@ -10,8 +10,3 @@ dusktest(test_modulerequire.c)
 dusktest(test_scriptdef.c)
 
 dusktest(test_moduleconsole.c)
-
-dusktest(test_overworldscene.c)
-target_compile_definitions(test_overworldscene PRIVATE
-  DUSK_ASSETS_DIR="${DUSK_ASSETS_DIR}"
-)

test/script/test_overworldscene.c

@@ -1,404 +0,0 @@
-/**
- * Copyright (c) 2026 Dominic Masters
- *
- * This software is released under the MIT License.
- * https://opensource.org/licenses/MIT
- */
-
-#include "dusktest.h"
-#include "util/memory.h"
-#include "asset/asset.h"
-#include "scene/scene.h"
-#include "entity/entitymanager.h"
-#include "entity/component.h"
-#include "entity/component/display/entityposition.h"
-#include "entity/component/physics/entityphysics.h"
-#include "entity/component/display/entityrenderable.h"
-#include "display/mesh/plane.h"
-#include "display/mesh/capsule.h"
-#include "script/scriptmanager.h"
-#include "script/module/scene/modulescene.h"
-#include "script/module/require/modulerequire.h"
-#include <zip.h>
-#include <stdio.h>
-#include <string.h>
-
-#ifndef DUSK_ASSETS_DIR
-  #error "DUSK_ASSETS_DIR must be defined"
-#endif
-
-static char_t *readFile(const char_t *relativePath) {
-  char_t path[512];
-  snprintf(path, sizeof(path), "%s/%s", DUSK_ASSETS_DIR, relativePath);
-
-  FILE *f = fopen(path, "rb");
-  assert_non_null(f);
-
-  fseek(f, 0, SEEK_END);
-  long size = ftell(f);
-  fseek(f, 0, SEEK_SET);
-
-  char_t *buf = (char_t *)memoryAllocate((size_t)size + 1);
-  size_t read = fread(buf, 1, (size_t)size, f);
-  fclose(f);
-  buf[read] = '\0';
-
-  return buf;
-}
-
-// Runs the real, shipped overworldscene.js through Scene.set() the same
-// way require()/init.js would -- not a copy embedded in this test, so
-// this actually verifies what ships.
-static errorret_t installOverworldScene(void) {
-  char_t *fileSrc = readFile("scripts/overworldscene.js");
-
-  const char_t *prefix = "var module = { exports: {} };\n(function(module){\n";
-  const char_t *suffix = "\n})(module);\nScene.set(module.exports);";
-  size_t wrappedLen = strlen(prefix) + strlen(fileSrc) + strlen(suffix);
-  char_t *wrapped = (char_t *)memoryAllocate(wrappedLen + 1);
-  snprintf(
-    wrapped, wrappedLen + 1, "%s%s%s", prefix, fileSrc, suffix
-  );
-  memoryFree(fileSrc);
-
-  // overworldscene.js now require()s sibling files (Player.js etc.) --
-  // push the same base directory scriptManagerExecFile() would push for
-  // a real load, since this test bypasses that path to exec a wrapped
-  // copy of the source directly instead.
-  moduleRequireDirPush("scripts/");
-  errorret_t ret = scriptManagerExec(wrapped, NULL);
-  moduleRequireDirPop();
-  memoryFree(wrapped);
-  return ret;
-}
-
-static zip_t *g_zip = NULL;
-
-// overworldscene.js require()s sibling files (Player.js/TestPlane.js/
-// PlayerCamera.js), which resolve through the asset system's ASSET.zip --
-// there's no real-filesystem fallback (see assetFileInit()). Package the
-// real, shipped copies of those files (read straight off disk, not
-// hardcoded here) into an in-memory zip so require() finds the same
-// content a real build would.
-static int overworld_setup(void **state) {
-  sceneInit();
-
-  errorret_t ret = scriptManagerInit();
-  if(errorIsNotOk(ret)) { errorCatch(ret); return -1; }
-
-  zip_error_t err;
-  zip_error_init(&err);
-
-  zip_source_t *write_src = zip_source_buffer_create(NULL, 0, 1, &err);
-  if(!write_src) return -1;
-
-  zip_t *za = zip_open_from_source(write_src, ZIP_TRUNCATE, &err);
-  if(!za) { zip_source_free(write_src); return -1; }
-
-  const char_t *requiredScripts[] = {
-    "scripts/Player.js", "scripts/TestPlane.js", "scripts/PlayerCamera.js"
-  };
-  char_t *scriptSrcs[3];
-
-  for(size_t i = 0; i < 3; i++) {
-    scriptSrcs[i] = readFile(requiredScripts[i]);
-    zip_source_t *s = zip_source_buffer(
-      za, scriptSrcs[i], strlen(scriptSrcs[i]), 0
-    );
-    if(zip_file_add(za, requiredScripts[i], s, ZIP_FL_OVERWRITE) < 0) {
-      zip_close(za);
-      return -1;
-    }
-  }
-
-  zip_source_keep(write_src);
-  if(zip_close(za) != 0) { zip_source_free(write_src); return -1; }
-
-  // zip_close() has fully read every source added above by now, so the
-  // backing buffers are safe to free.
-  for(size_t i = 0; i < 3; i++) memoryFree(scriptSrcs[i]);
-
-  zip_stat_t zs;
-  memset(&zs, 0, sizeof(zs));
-  if(zip_source_stat(write_src, &zs) != 0 || !(zs.valid & ZIP_STAT_SIZE)) {
-    zip_source_free(write_src);
-    return -1;
-  }
-
-  void *zipbuf = malloc((size_t)zs.size);
-  if(!zipbuf) { zip_source_free(write_src); return -1; }
-
-  if(zip_source_open(write_src) != 0) {
-    free(zipbuf);
-    zip_source_free(write_src);
-    return -1;
-  }
-  zip_source_read(write_src, zipbuf, (zip_uint64_t)zs.size);
-  zip_source_close(write_src);
-  zip_source_free(write_src);
-
-  zip_error_init(&err);
-  zip_source_t *read_src = zip_source_buffer_create(
-    zipbuf, (zip_uint64_t)zs.size, 1, &err
-  );
-  if(!read_src) { free(zipbuf); return -1; }
-
-  g_zip = zip_open_from_source(read_src, 0, &err);
-  if(!g_zip) { zip_source_free(read_src); return -1; }
-
-  ASSET.zip = g_zip;
-
-  return 0;
-}
-
-static int overworld_teardown(void **state) {
-  errorret_t ret = scriptManagerDispose();
-  if(errorIsNotOk(ret)) errorCatch(ret);
-
-  sceneDispose();
-
-  if(g_zip) { zip_close(g_zip); g_zip = NULL; }
-  ASSET.zip = NULL;
-
-  // JerryScript defers freeing native-wrapped handles (Entity/Scene/
-  // Position/Physics/Renderable instances) until GC/jerry_cleanup() runs,
-  // so the leak check can only be meaningful after scriptManagerDispose()
-  // has actually run above -- not inside the test body.
-  assert_int_equal(memoryGetAllocatedCount(), 0);
-  return 0;
-}
-
-static void test_overworldscene_builds_expected_entities(void **state) {
-  errorret_t ret = installOverworldScene();
-  assert_true(errorIsOk(ret));
-
-  sceneid_t sceneId = sceneGetActive();
-  assert_true(sceneId != SCENE_ID_INVALID);
-  entitymanager_t *mgr = sceneGetEntities(sceneId);
-
-  // Entity 0: player (new Player() runs first in init()).
-  entityid_t playerEntity = 0;
-  componentid_t playerPos = entityGetComponent(
-    mgr, playerEntity, COMPONENT_TYPE_POSITION
-  );
-  assert_true(playerPos != COMPONENT_ID_INVALID);
-
-  vec3 playerPosition;
-  entityPositionGetLocalPosition(mgr, playerEntity, playerPos, playerPosition);
-  assert_float_equal(playerPosition[0], 0.0f, 0.0001f);
-  assert_float_equal(playerPosition[1], 2.0f, 0.0001f);
-  assert_float_equal(playerPosition[2], 0.0f, 0.0001f);
-
-  componentid_t playerPhysics = entityGetComponent(
-    mgr, playerEntity, COMPONENT_TYPE_PHYSICS
-  );
-  assert_true(playerPhysics != COMPONENT_ID_INVALID);
-  assert_int_equal(
-    entityPhysicsGetBodyType(mgr, playerEntity, playerPhysics),
-    PHYSICS_BODY_DYNAMIC
-  );
-  physicsshape_t playerShape = entityPhysicsGetShape(
-    mgr, playerEntity, playerPhysics
-  );
-  assert_int_equal(playerShape.type, PHYSICS_SHAPE_CAPSULE);
-  assert_float_equal(playerShape.data.capsule.radius, 0.5f, 0.0001f);
-  assert_float_equal(playerShape.data.capsule.halfHeight, 0.5f, 0.0001f);
-
-  componentid_t playerRenderable = entityGetComponent(
-    mgr, playerEntity, COMPONENT_TYPE_RENDERABLE
-  );
-  assert_true(playerRenderable != COMPONENT_ID_INVALID);
-  entityrenderable_t *playerR = componentGetData(
-    mgr, playerEntity, playerRenderable, COMPONENT_TYPE_RENDERABLE
-  );
-  assert_ptr_equal(playerR->data.material.meshes[0], &CAPSULE_MESH_SIMPLE);
-  assert_int_equal(playerR->data.material.material.unlit.color.r, 0);
-  assert_int_equal(playerR->data.material.material.unlit.color.g, 0);
-  assert_int_equal(playerR->data.material.material.unlit.color.b, 255);
-  assert_int_equal(playerR->data.material.material.unlit.color.a, 255);
-
-  assert_true(
-    entityGetComponent(mgr, playerEntity, COMPONENT_TYPE_PLAYER) !=
-    COMPONENT_ID_INVALID
-  );
-
-  // Entity 1: static ground plane (new TestPlane() runs second).
-  entityid_t planeEntity = 1;
-  componentid_t planePos = entityGetComponent(
-    mgr, planeEntity, COMPONENT_TYPE_POSITION
-  );
-  assert_true(planePos != COMPONENT_ID_INVALID);
-
-  vec3 planePosition, planeScale;
-  entityPositionGetLocalPosition(mgr, planeEntity, planePos, planePosition);
-  entityPositionGetLocalScale(mgr, planeEntity, planePos, planeScale);
-  assert_float_equal(planePosition[0], -10.0f, 0.0001f);
-  assert_float_equal(planePosition[1], 0.0f, 0.0001f);
-  assert_float_equal(planePosition[2], -10.0f, 0.0001f);
-  assert_float_equal(planeScale[0], 20.0f, 0.0001f);
-  assert_float_equal(planeScale[1], 1.0f, 0.0001f);
-  assert_float_equal(planeScale[2], 20.0f, 0.0001f);
-
-  componentid_t planePhysics = entityGetComponent(
-    mgr, planeEntity, COMPONENT_TYPE_PHYSICS
-  );
-  assert_true(planePhysics != COMPONENT_ID_INVALID);
-  assert_int_equal(
-    entityPhysicsGetBodyType(mgr, planeEntity, planePhysics),
-    PHYSICS_BODY_STATIC
-  );
-  physicsshape_t planeShape = entityPhysicsGetShape(
-    mgr, planeEntity, planePhysics
-  );
-  assert_int_equal(planeShape.type, PHYSICS_SHAPE_PLANE);
-  assert_float_equal(planeShape.data.plane.normal[0], 0.0f, 0.0001f);
-  assert_float_equal(planeShape.data.plane.normal[1], 1.0f, 0.0001f);
-  assert_float_equal(planeShape.data.plane.normal[2], 0.0f, 0.0001f);
-  assert_float_equal(planeShape.data.plane.distance, 0.0f, 0.0001f);
-
-  componentid_t planeRenderable = entityGetComponent(
-    mgr, planeEntity, COMPONENT_TYPE_RENDERABLE
-  );
-  assert_true(planeRenderable != COMPONENT_ID_INVALID);
-  entityrenderable_t *planeR = componentGetData(
-    mgr, planeEntity, planeRenderable, COMPONENT_TYPE_RENDERABLE
-  );
-  assert_ptr_equal(planeR->data.material.meshes[0], &PLANE_MESH_SIMPLE);
-  assert_int_equal(planeR->data.material.material.unlit.color.r, 128);
-  assert_int_equal(planeR->data.material.material.unlit.color.g, 128);
-  assert_int_equal(planeR->data.material.material.unlit.color.b, 128);
-  assert_int_equal(planeR->data.material.material.unlit.color.a, 255);
-
-  // Entity 2: camera (new PlayerCamera(player) runs last). Position +
-  // Camera components, positioned at the player's local position plus
-  // PlayerCamera.js's fixed offset (angle=0, radius=18, height=10) --
-  // player is at (0, 2, 0), so eye=(18, 12, 0).
-  entityid_t camEntity = 2;
-  componentid_t camPos = entityGetComponent(
-    mgr, camEntity, COMPONENT_TYPE_POSITION
-  );
-  assert_true(camPos != COMPONENT_ID_INVALID);
-  assert_true(
-    entityGetComponent(mgr, camEntity, COMPONENT_TYPE_CAMERA) !=
-    COMPONENT_ID_INVALID
-  );
-
-  vec3 camPosition;
-  entityPositionGetLocalPosition(mgr, camEntity, camPos, camPosition);
-  assert_float_equal(camPosition[0], 18.0f, 0.0001f);
-  assert_float_equal(camPosition[1], 12.0f, 0.0001f);
-  assert_float_equal(camPosition[2], 0.0f, 0.0001f);
-}
-
-static void test_overworldscene_camera_follows_player(void **state) {
-  errorret_t ret = installOverworldScene();
-  assert_true(errorIsOk(ret));
-
-  sceneid_t sceneId = sceneGetActive();
-  entitymanager_t *mgr = sceneGetEntities(sceneId);
-
-  entityid_t playerEntity = 0;
-  componentid_t playerPos = entityGetComponent(
-    mgr, playerEntity, COMPONENT_TYPE_POSITION
-  );
-
-  entityid_t camEntity = 2;
-  componentid_t camPos = entityGetComponent(
-    mgr, camEntity, COMPONENT_TYPE_POSITION
-  );
-
-  // Move the player and confirm the camera's next update() re-centers on
-  // the player's new position at the same fixed offset (PlayerCamera.js
-  // no longer orbits over time -- it just tracks the player).
-  entityPositionSetLocalPosition(
-    mgr, playerEntity, playerPos, (vec3){ 5.0f, 2.0f, -3.0f }
-  );
-
-  ret = moduleSceneUpdateCurrent();
-  assert_true(errorIsOk(ret));
-
-  vec3 camPosition;
-  entityPositionGetLocalPosition(mgr, camEntity, camPos, camPosition);
-  assert_float_equal(camPosition[0], 5.0f + 18.0f, 0.0001f);
-  assert_float_equal(camPosition[1], 2.0f + 10.0f, 0.0001f);
-  assert_float_equal(camPosition[2], -3.0f, 0.0001f);
-}
-
-static void test_scene_set_switches_and_disposes(void **state) {
-  errorret_t ret = installOverworldScene();
-  assert_true(errorIsOk(ret));
-  assert_true(sceneGetActive() != SCENE_ID_INVALID);
-
-  // Install a second, trivial scene module in place of the first. This
-  // must: call the first module's dispose(), destroy its scene, then
-  // create+activate a new one and call the new module's init().
-  ret = scriptManagerExec(
-    "var switchState = { updateCount: 0, disposed: false };\n"
-    "Scene.set({\n"
-    "  init: function() { var e = new Entity(); e.add(POSITION); },\n"
-    "  update: function() { switchState.updateCount++; },\n"
-    "  dispose: function() { switchState.disposed = true; }\n"
-    "});",
-    NULL
-  );
-  assert_true(errorIsOk(ret));
-
-  sceneid_t secondSceneId = sceneGetActive();
-  assert_true(secondSceneId != SCENE_ID_INVALID);
-
-  entitymanager_t *mgr = sceneGetEntities(secondSceneId);
-  assert_true(
-    entityGetComponent(mgr, 0, COMPONENT_TYPE_POSITION) !=
-    COMPONENT_ID_INVALID
-  );
-  // The first module's plane entity (entity 1, POSITION+PHYSICS+
-  // RENDERABLE) must be gone -- proves the old scene was actually torn
-  // down, not just deactivated. (Scene IDs are a small reused pool --
-  // SCENE_COUNT_MAX slots -- so secondSceneId == firstSceneId here is
-  // expected, not a bug: sceneCreate() picks the first free slot, and
-  // destroying firstSceneId frees that exact slot right back up.)
-  assert_true(
-    entityGetComponent(mgr, 1, COMPONENT_TYPE_POSITION) ==
-    COMPONENT_ID_INVALID
-  );
-
-  ret = moduleSceneUpdateCurrent();
-  assert_true(errorIsOk(ret));
-
-  jerry_value_t result;
-  ret = scriptManagerExec("switchState.updateCount", &result);
-  assert_true(errorIsOk(ret));
-  assert_true(jerry_value_is_number(result));
-  assert_int_equal((int)jerry_value_as_number(result), 1);
-  jerry_value_free(result);
-
-  // Switching again must call the second module's dispose().
-  ret = scriptManagerExec(
-    "Scene.set({ init: function() {} });", NULL
-  );
-  assert_true(errorIsOk(ret));
-
-  ret = scriptManagerExec("switchState.disposed", &result);
-  assert_true(errorIsOk(ret));
-  assert_true(jerry_value_is_true(result));
-  jerry_value_free(result);
-}
-
-int main(void) {
-  assertInit();
-  const struct CMUnitTest tests[] = {
-    cmocka_unit_test_setup_teardown(
-      test_overworldscene_builds_expected_entities,
-      overworld_setup, overworld_teardown
-    ),
-    cmocka_unit_test_setup_teardown(
-      test_overworldscene_camera_follows_player,
-      overworld_setup, overworld_teardown
-    ),
-    cmocka_unit_test_setup_teardown(
-      test_scene_set_switches_and_disposes,
-      overworld_setup, overworld_teardown
-    ),
-  };
-  return cmocka_run_group_tests(tests, NULL, NULL);
-}