Add some tests

CMakeLists.txt

@@ -25,6 +25,7 @@ set(DUSK_CACHE_TARGET "dusk-target")
 set(DUSK_ROOT_DIR "${CMAKE_SOURCE_DIR}")
 set(DUSK_BUILD_DIR "${CMAKE_BINARY_DIR}")
 set(DUSK_SOURCES_DIR "${DUSK_ROOT_DIR}/src")
+set(DUSK_TEST_DIR "${DUSK_ROOT_DIR}/test")
 set(DUSK_TEMP_DIR "${DUSK_BUILD_DIR}/temp")
 set(DUSK_TOOLS_DIR "${DUSK_ROOT_DIR}/tools")
 set(DUSK_DATA_DIR "${DUSK_ROOT_DIR}/data")
@@ -75,7 +76,7 @@ add_subdirectory(assets)
 if(DUSK_TARGET_SYSTEM STREQUAL "linux")
   find_package(SDL2 REQUIRED)
   find_package(OpenGL REQUIRED)
-  target_link_libraries(${DUSK_LIBRARY_TARGET_NAME} PRIVATE 
+  target_link_libraries(${DUSK_LIBRARY_TARGET_NAME} PUBLIC 
     SDL2
     OpenGL::GL
     GL

cmake/modules/Findcmocka.cmake

@@ -0,0 +1,14 @@
+# Copyright (c) 2026 Dominic Masters
+# 
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+include(FetchContent)
+FetchContent_Declare(
+  cmocka
+  GIT_REPOSITORY https://gitlab.com/cmocka/cmocka.git
+  GIT_TAG       cmocka-2.0.1
+)
+
+FetchContent_MakeAvailable(cmocka)
+set(cmocka_FOUND ON)

cmake/modules/dusktest.cmake

@@ -0,0 +1,32 @@
+# Copyright (c) 2026 Dominic Masters
+# 
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+find_package(cmocka REQUIRED)
+
+# Function to create a test executable from a single .c file
+function(dusktest TEST_C_FILE)
+  # Create target name from file name
+  get_filename_component(TEST_NAME ${TEST_C_FILE} NAME_WE)
+
+  # Create the executable target
+  add_executable(${TEST_NAME})
+
+  # Setup some compiler definitions.
+  target_compile_definitions(${TEST_NAME} PRIVATE
+    DUSK_TEST_ASSERT=1
+  )
+
+  # Add the test file
+  target_sources(${TEST_NAME} PRIVATE ${TEST_C_FILE})
+
+  # Add sources, both common and test-specific
+  target_include_directories(${TEST_NAME} PUBLIC ${CMAKE_CURRENT_LIST_DIR} ${DUSK_TEST_DIR})
+
+  # Link against DuskCore and cmocka
+  target_link_libraries(${TEST_NAME} PUBLIC ${DUSK_LIBRARY_TARGET_NAME} cmocka)
+
+  # Add as a CTest
+  add_test(NAME ${TEST_NAME} COMMAND ${TEST_NAME})
+endfunction()

src/assert/assert.c

@@ -9,23 +9,39 @@
 #include "debug/debug.h"
 
 #ifndef ASSERTIONS_FAKED
-  void assertTrueImpl(
-    const char *file,
-    const int32_t line,
-    const bool x,
-    const char *message
-  ) {
-    if(x != true) {
-      debugPrint(
-        "Assertion Failed in %s:%i\n\n%s\n",
+  #ifdef DUSK_TEST_ASSERT
+    void assertTrueImpl(
+      const char *file,
+      const int32_t line,
+      const bool x,
+      const char *message
+    ) {
+      mock_assert(
+        x == true,
+        message,
         file,
-        line,
-        message
+        line
       );
-
-      abort();
     }
-  }
+  #else
+    void assertTrueImpl(
+      const char *file,
+      const int32_t line,
+      const bool x,
+      const char *message
+    ) {
+      if(x != true) {
+        debugPrint(
+          "Assertion Failed in %s:%i\n\n%s\n",
+          file,
+          line,
+          message
+        );
+
+        abort();
+      }
+    }
+  #endif
 
   void assertFalseImpl(
     const char *file,

src/assert/assert.h

@@ -8,6 +8,14 @@
 #pragma once
 #include "dusk.h"
 
+#ifdef DUSK_TEST_ASSERT
+  #include <cmocka.h>
+  
+  #ifdef ASSERTIONS_FAKED
+    #error "Cannot fake assertions when DUSK_TEST_ASSERT is set."
+  #endif
+#endif
+
 #ifndef ASSERTIONS_FAKED
   /**
    * Assert a given value to be true.
@@ -105,27 +113,77 @@
     const char *message
   );
 
+  /**
+   * Asserts a given value to be true.
+   * 
+   * @param x Value to assert as true.
+   * @param message Message to throw against assertion failure.
+   */
   #define assertTrue(x, message) \
     assertTrueImpl(__FILE__, __LINE__, x, message)
 
+  /**
+   * Asserts a given statement to be false.
+   * 
+   * @param x Value to assert as false.
+   * @param message Message to throw against assertion failure.
+   */
   #define assertFalse(x, message) \
     assertFalseImpl(__FILE__, __LINE__, x, message)
 
+  /**
+   * Asserts that a given line of code is unreachable. Essentially a forced
+   * assertion failure, good for "edge cases"
+   * 
+   * @param message Message to throw against assertion failure.
+   */
   #define assertUnreachable(message) \
     assertUnreachableImpl(__FILE__, __LINE__, message)
 
+
+  /**
+   * Asserts a pointer is not null.
+   *
+   * @param pointer Pointer to check.
+   * @param message Message to throw against assertion failure.
+   */
   #define assertNotNull(pointer, message) \
     assertNotNullImpl(__FILE__, __LINE__, pointer, message)
 
+  /**
+   * Asserts a pointer is null.
+   *
+   * @param pointer Pointer to check.
+   * @param message Message to throw against assertion failure.
+   */
   #define assertNull(pointer, message) \
     assertNullImpl(__FILE__, __LINE__, pointer, message)
 
+  /**
+   * Asserts a function or code path is deprecated.
+   *
+   * @param message Message to throw against assertion failure.
+   */
   #define assertDeprecated(message) \
     assertDeprecatedImpl(__FILE__, __LINE__, message)
 
+  /**
+   * Asserts a string's length is less than a maximum.
+   *
+   * @param str String to check.
+   * @param len Maximum length.
+   * @param message Message to throw against assertion failure.
+   */
   #define assertStrLenMax(str, len, message) \
     assertTrue(strlen(str) < len, message)
 
+  /**
+   * Asserts a string's length is at least a minimum.
+   *
+   * @param str String to check.
+   * @param len Minimum length.
+   * @param message Message to throw against assertion failure.
+   */
   #define assertStrLenMin(str, len, message) \
     assertTrue(strlen(str) >= len, message)
 

src/util/math.c

@@ -9,6 +9,8 @@
 
 uint32_t mathNextPowTwo(uint32_t value) {
   if(value == 0) return 1; // Handle zero case
+  if(value >= 0x80000000) return 1; // Handle overflow case
+
   value--;
   value |= value >> 1;
   value |= value >> 2;

src/util/memory.c

@@ -7,6 +7,7 @@
 
 #include "memory.h"
 #include "assert/assert.h"
+#include "util/math.h"
 
 void * memoryAllocate(const size_t size) {
   assertTrue(size > 0, "Cannot allocate 0 bytes of memory.");
@@ -83,14 +84,13 @@ void memoryReallocate(void **ptr, const size_t size) {
 
 void memoryResize(void **ptr, const size_t oldSize, const size_t newSize) {
   assertNotNull(ptr, "Cannot resize NULL pointer.");
+  assertTrue(newSize > 0, "Cannot resize to 0 bytes of memory.");
+  assertTrue(oldSize > 0, "Old size cannot be 0 bytes.");
   if(newSize == oldSize) return;
-  if(oldSize == 0) return memoryReallocate(ptr, newSize);
-
-  assertTrue(newSize > oldSize, "New size must be greater than old size.");
 
   void *newPointer = memoryAllocate(newSize);
   assertNotNull(newPointer, "Memory resizing failed.");
-  memoryCopy(newPointer, *ptr, oldSize);
+  memoryCopy(newPointer, *ptr, mathMin(oldSize, newSize));
   memoryFree(*ptr);
   *ptr = newPointer;
 }

test/CMakeLists.txt

@@ -1,10 +1,6 @@
-# Copyright (c) 2025 Dominic Masters
-#
+# Copyright (c) 2026 Dominic Masters
+# 
 # This software is released under the MIT License.
 # https://opensource.org/licenses/MIT
 
-# Tests
-add_executable(test_main test_main.c)
-target_include_directories(test_main PUBLIC ${CMAKE_CURRENT_LIST_DIR})
-target_link_libraries(test_main PUBLIC ${DUSK_LIBRARY_TARGET_NAME})
-add_test( NAME tests1 COMMAND test_main)
+add_subdirectory(util)

test/dusktest.h

@@ -5,7 +5,6 @@
  * https://opensource.org/licenses/MIT
  */
 
-int main(int argc, char **argv) {
-  // return 1;
-  return 0;
-}
+#pragma once
+#include "dusk.h"
+#include "assert/assert.h"// Includes cmocka when DUSK_TEST_ASSERT is set

test/util/CMakeLists.txt

@@ -0,0 +1,10 @@
+# Copyright (c) 2026 Dominic Masters
+#
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+include(dusktest)
+
+# Tests
+dusktest(test_math.c)
+dusktest(test_memory.c)

test/util/test_math.c

@@ -0,0 +1,206 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "dusktest.h"
+#include "util/math.h"
+
+static void test_mathNextPowTwo(void **state) {
+  (void)state;
+
+  // Positive integers
+  assert_int_equal(mathNextPowTwo(0), 1);
+  assert_int_equal(mathNextPowTwo(1), 1);
+  assert_int_equal(mathNextPowTwo(2), 2);
+  assert_int_equal(mathNextPowTwo(3), 4);
+  assert_int_equal(mathNextPowTwo(4), 4);
+  assert_int_equal(mathNextPowTwo(5), 8);
+  assert_int_equal(mathNextPowTwo(15), 16);
+  assert_int_equal(mathNextPowTwo(16), 16);
+  assert_int_equal(mathNextPowTwo(17), 32);
+  assert_int_equal(mathNextPowTwo(31), 32);
+  assert_int_equal(mathNextPowTwo(32), 32);
+  assert_int_equal(mathNextPowTwo(33), 64);
+  assert_int_equal(mathNextPowTwo(63), 64);
+  assert_int_equal(mathNextPowTwo(64), 64);
+  assert_int_equal(mathNextPowTwo(65), 128);
+
+  // Large values
+  assert_int_equal(mathNextPowTwo(1000), 1024);
+  assert_int_equal(mathNextPowTwo(4095), 4096);
+
+  // Zero
+  assert_int_equal(mathNextPowTwo(0), 1);
+
+  // Max Value
+  assert_int_equal(mathNextPowTwo(0xFFFFFFFF), 1);
+}
+
+static void test_mathMax(void **state) {
+  (void)state;
+  // Test positive integers
+  assert_int_equal(mathMax(1, 2), 2);
+  assert_int_equal(mathMax(2, 1), 2);
+
+  // Test negative integers
+  assert_int_equal(mathMax(-1, -2), -1);
+  assert_int_equal(mathMax(-4, -2), -2);
+
+  // Test 0
+  assert_int_equal(mathMax(0, -1), 0);
+  assert_int_equal(mathMax(-1, 0), 0);
+
+  // Test large values
+  assert_int_equal(mathMax(1000000, 999999), 1000000);
+  assert_int_equal(mathMax(999999, 1000000), 1000000);
+
+  // Test mixed negative and positive
+  assert_int_equal(mathMax(-32, 5), 5);
+  assert_int_equal(mathMax(5, -32), 5);
+
+  // Floats with floats
+  assert_float_equal(mathMax(1.5f, 2.5f), 2.5f, 0.0001f);
+  assert_float_equal(mathMax(2.5f, 1.5f), 2.5f, 0.0001f);
+  assert_float_equal(mathMax(-1.5f, -2.5f), -1.5f, 0.0001f);
+  assert_float_equal(mathMax(-2.5f, -1.5f), -1.5f, 0.0001f);
+  assert_float_equal(mathMax(0.0f, -1.5f), 0.0f, 0.0001f);
+  assert_float_equal(mathMax(-1.5f, 0.0f), 0.0f, 0.0001f);
+  assert_float_equal(mathMax(500.0f, -333.0f), 500.0f, 0.0001f);
+  assert_float_equal(mathMax(-333.0f, 500.0f), 500.0f, 0.0001f);
+
+  // Floats with integers
+  assert_float_equal(mathMax(1, 2.5f), 2.5f, 0.0001f);
+  assert_float_equal(mathMax(2.5f, 1), 2.5f, 0.0001f);
+  assert_float_equal(mathMax(-1, -2.5f), -1.0f, 0.0001f);
+  assert_float_equal(mathMax(-2.5f, -1), -1.0f, 0.0001f);
+  assert_float_equal(mathMax(0, -1.5f), 0.0f, 0.0001f);
+  assert_float_equal(mathMax(-1.5f, 0), 0.0f, 0.0001f);
+  assert_float_equal(mathMax(500, -333.5f), 500.0f, 0.0001f);
+  assert_float_equal(mathMax(-333.5f, 500), 500.0f, 0.0001f);
+}
+
+static void test_mathMin(void **state) {
+  (void)state;
+
+  // Positive integers
+  assert_int_equal(mathMin(1, 2), 1);
+  assert_int_equal(mathMin(2, 1), 1);
+  assert_int_equal(mathMin(0, 5), 0);
+  assert_int_equal(mathMin(5, 0), 0);
+
+  // Negative integers
+  assert_int_equal(mathMin(-1, -2), -2);
+  assert_int_equal(mathMin(-2, -1), -2);
+  assert_int_equal(mathMin(-5, -10), -10);
+  assert_int_equal(mathMin(-10, -5), -10);
+
+  // Mixed negative and positive
+  assert_int_equal(mathMin(-5, 32), -5);
+  assert_int_equal(mathMin(32, -5), -5);
+
+  // Large values
+  assert_int_equal(mathMin(1000000, 999999), 999999);
+  assert_int_equal(mathMin(999999, 1000000), 999999);
+
+  // Floats with floats
+  assert_float_equal(mathMin(1.5f, 2.5f), 1.5f, 0.0001f);
+  assert_float_equal(mathMin(2.5f, 1.5f), 1.5f, 0.0001f);
+  assert_float_equal(mathMin(-1.5f, -2.5f), -2.5f, 0.0001f);
+  assert_float_equal(mathMin(-2.5f, -1.5f), -2.5f, 0.0001f);
+  assert_float_equal(mathMin(0.0f, -1.5f), -1.5f, 0.0001f);
+  assert_float_equal(mathMin(-1.5f, 0.0f), -1.5f, 0.0001f);
+  assert_float_equal(mathMin(500.0f, -333.0f), -333.0f, 0.0001f);
+  assert_float_equal(mathMin(-333.0f, 500.0f), -333.0f, 0.0001f);
+
+  // Floats with integers
+  assert_float_equal(mathMin(1, 2.5f), 1.0f, 0.0001f);
+  assert_float_equal(mathMin(2.5f, 1), 1.0f, 0.0001f);
+  assert_float_equal(mathMin(-1, -2.5f), -2.5f, 0.0001f);
+  assert_float_equal(mathMin(-2.5f, -1), -2.5f, 0.0001f);
+  assert_float_equal(mathMin(0, -1.5f), -1.5f, 0.0001f);
+  assert_float_equal(mathMin(-1.5f, 0), -1.5f, 0.0001f);
+  assert_float_equal(mathMin(500, -333.5f), -333.5f, 0.0001f);
+  assert_float_equal(mathMin(-333.5f, 500), -333.5f, 0.0001f);
+}
+
+static void test_mathClamp(void **state) {
+  (void)state;
+
+  // Positive Integer bounds.
+  assert_int_equal(mathClamp(5, 1, 10), 5); // Within bounds
+  assert_int_equal(mathClamp(0, 1, 10), 1); // Below lower bound
+  assert_int_equal(mathClamp(15, 1, 10), 10); // Above upper bound
+
+  // Negative Integer bounds.
+  assert_int_equal(mathClamp(-5, -10, -1), -5); // Within bounds
+  assert_int_equal(mathClamp(-15, -10, -1), -10); // Below lower bound
+  assert_int_equal(mathClamp(0, -10, -1), -1); // Above upper bound
+
+  // Mixed Integer bounds.
+  assert_int_equal(mathClamp(0, -5, 5), 0); // Within bounds
+  assert_int_equal(mathClamp(-10, -5, 5), -5); // Below lower bound
+  assert_int_equal(mathClamp(10, -5, 5), 5); // Above upper bound
+
+  // Positive Float bounds.
+  assert_float_equal(mathClamp(5.5f, 1.0f, 10.0f), 5.5f, 0.0001f); // Within
+  assert_float_equal(mathClamp(0.5f, 1.0f, 10.0f), 1.0f, 0.0001f); // Below
+  assert_float_equal(mathClamp(15.5f, 1.0f, 10.0f), 10.0f, 0.0001f); // Above
+
+  // Negative Float bounds.
+  assert_float_equal(mathClamp(-5.5f, -10.0f, -1.0f), -5.5f, 0.0001f); // Within
+  assert_float_equal(mathClamp(-15.5f, -10.0f, -1.0f), -10.0f, 0.0001f);// Below
+  assert_float_equal(mathClamp(0.0f, -10.0f, -1.0f), -1.0f, 0.0001f); // Above
+
+  // Mixed Float bounds.
+  assert_float_equal(mathClamp(0.0f, -5.0f, 5.0f), 0.0f, 0.0001f); // Within
+  assert_float_equal(mathClamp(-10.0f, -5.0f, 5.0f), -5.0f, 0.0001f); // Below
+  assert_float_equal(mathClamp(10.0f, -5.0f, 5.0f), 5.0f, 0.0001f); // Above
+
+  // With integers and floats mixed
+  assert_float_equal(mathClamp(5, 1.0f, 10.0f), 5.0f, 0.0001f); // Within
+  assert_float_equal(mathClamp(0, 1.0f, 10.0f), 1.0f, 0.0001f); // Below
+  assert_float_equal(mathClamp(15, 1.0f, 10.0f), 10.0f, 0.0001f); // Above
+  assert_float_equal(mathClamp(5.5f, 1, 10), 5.5f, 0.0001f); // Within
+  assert_float_equal(mathClamp(0.5f, 1, 10), 1.0f, 0.0001f); // Below
+  assert_float_equal(mathClamp(15.5f, 1, 10), 10.0f, 0.0001f); // Above
+  assert_float_equal(mathClamp(-5, -10.0f, -1.0f), -5.0f, 0.0001f); // Within
+  assert_float_equal(mathClamp(-15, -10.0f, -1.0f), -10.0f, 0.0001f);// Below
+  assert_float_equal(mathClamp(0, -10.0f, -1.0f), -1.0f, 0.0001f); // Above
+  assert_float_equal(mathClamp(-5.5f, -10, -1), -5.5f, 0.0001f); // Within
+  assert_float_equal(mathClamp(-15.5f, -10, -1), -10.0f, 0.0001f);// Below
+  assert_float_equal(mathClamp(0.0f, -10, -1), -1.0f, 0.0001f); // Above
+}
+
+static void test_mathAbs(void **state) {
+  (void)state;
+
+  // Positive integers
+  assert_int_equal(mathAbs(5), 5);
+  assert_int_equal(mathAbs(0), 0);
+
+  // Negative integers
+  assert_int_equal(mathAbs(-5), 5);
+  assert_int_equal(mathAbs(-100), 100);
+
+  // Positive floats
+  assert_float_equal(mathAbs(5.5f), 5.5f, 0.0001f);
+  assert_float_equal(mathAbs(0.0f), 0.0f, 0.0001f);
+
+  // Negative floats
+  assert_float_equal(mathAbs(-5.5f), 5.5f, 0.0001f);
+  assert_float_equal(mathAbs(-100.25f), 100.25f, 0.0001f);
+}
+
+int main(int argc, char **argv) {
+  const struct CMUnitTest tests[] = {
+    cmocka_unit_test(test_mathNextPowTwo),
+    cmocka_unit_test(test_mathMax),
+    cmocka_unit_test(test_mathMin),
+    cmocka_unit_test(test_mathClamp),
+    cmocka_unit_test(test_mathAbs),
+  };
+  return cmocka_run_group_tests(tests, NULL, NULL);
+}

test/util/test_memory.c

@@ -0,0 +1,347 @@
+/**
+ * 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"
+
+static void test_memoryAllocate(void **state) {
+  (void)state;
+
+  size_t size = 128;
+  void *ptr = memoryAllocate(size);
+  assert_non_null(ptr);
+  memoryFree(ptr);
+
+  // Should not be able to allocate 0 bytes
+  expect_assert_failure(memoryAllocate(0));
+
+  // Should not be able to allocate more memory than possible
+  expect_assert_failure(memoryAllocate(SIZE_MAX));
+}
+
+static void test_memoryFree(void **state) {
+  (void)state;
+
+  // Create some memory
+  size_t size = 64;
+  void *ptr = memoryAllocate(size);
+  assert_non_null(ptr);
+
+  // Free
+  memoryFree(ptr);
+
+  // Expect unable to free NULL
+  expect_assert_failure(memoryFree(NULL));
+}
+
+static void test_memoryCopy(void **state) {
+  (void)state;
+
+  // Create some memory
+  size_t size = 32;
+  void *src = memoryAllocate(size);
+  void *dest = memoryAllocate(size);
+  assert_non_null(src);
+  assert_non_null(dest);
+
+  // Fill source with known pattern and copy
+  memorySet(src, 0xAB, size);
+  memoryCopy(dest, src, size);
+  assert_memory_equal(src, dest, size);
+
+  // Should not be able to copy to NULL
+  expect_assert_failure(memoryCopy(NULL, src, size));
+
+  // Should not be able to copy from NULL
+  expect_assert_failure(memoryCopy(dest, NULL, size));
+
+  // Cannot copy 0 bytes
+  expect_assert_failure(memoryCopy(dest, src, 0));
+
+  // Cannot copy to itself
+  expect_assert_failure(memoryCopy(src, src, size));
+
+  memoryFree(src);
+  memoryFree(dest);
+}
+
+static void test_memorySet(void **state) {
+  (void)state;
+
+  // Allocate memory
+  size_t size = 16;
+  void *ptr = memoryAllocate(size);
+  assert_non_null(ptr);
+
+  // Fill with pattern
+  memorySet(ptr, 0xCD, size);
+  uint8_t expected[16];
+  for(size_t i = 0; i < size; i++) {
+    expected[i] = 0xCD;
+  }
+  assert_memory_equal(ptr, expected, size);
+
+  // Cannot set to NULL
+  expect_assert_failure(memorySet(NULL, 0x00, size));
+
+  // Canot set 0 bytes
+  expect_assert_failure(memorySet(ptr, 0x00, 0));
+
+  memoryFree(ptr);
+}
+
+static void test_memoryZero(void **state) {
+  (void)state;
+
+  // Create some memory
+  size_t size = 20;
+  void *ptr = memoryAllocate(size);
+  assert_non_null(ptr);
+
+  // Fill and then zero
+  memorySet(ptr, 0xEF, size);
+  memoryZero(ptr, size);
+
+  // All memory should be zeroed
+  uint8_t expected[20] = {0};
+  assert_memory_equal(ptr, expected, size);
+
+  // Cannot zero to NULL pointer
+  expect_assert_failure(memoryZero(NULL, size));
+
+  // Cannot zero 0 bytes
+  expect_assert_failure(memoryZero(ptr, 0));
+
+  memoryFree(ptr);
+}
+
+static void test_memoryCopyRangeSafe(void **state) {
+  (void)state;
+
+  // Create some memory
+  size_t size = 10;
+  void *src = memoryAllocate(size);
+  void *dest = memoryAllocate(size);
+  assert_non_null(src);
+  assert_non_null(dest);
+
+  // Initialize source with known pattern
+  for(size_t i = 0; i < size; i++) {
+    ((uint8_t*)src)[i] = (uint8_t)(i + 1); // 1, 2, ..., 10
+  }
+
+  // Copy a range from src[2] to src[7] (5 bytes) into dest
+  memoryCopyRangeSafe(dest, (uint8_t*)src + 2, (uint8_t*)src + 7, size);
+  uint8_t expected[10] = {3, 4, 5, 6, 7}; // Expected data in dest
+  assert_memory_equal(dest, expected, 5);
+
+  // Cannot copy to NULL destination
+  expect_assert_failure(memoryCopyRangeSafe(NULL, src, (uint8_t*)src + 5, size));
+  
+  // Cannot copy from NULL start
+  expect_assert_failure(memoryCopyRangeSafe(dest, NULL, (uint8_t*)src + 5, size));
+  
+  // Cannot copy from NULL end
+  expect_assert_failure(memoryCopyRangeSafe(dest, (uint8_t*)src, NULL, size));
+  
+  // Start and end are the same
+  expect_assert_failure(memoryCopyRangeSafe(dest, (uint8_t*)src, (uint8_t*)src, size));
+  
+  // End is before start
+  expect_assert_failure(memoryCopyRangeSafe(dest, (uint8_t*)src + 5, (uint8_t*)src + 2, size));
+  
+  // Size to copy exceeds maximum
+  expect_assert_failure(memoryCopyRangeSafe(dest, (uint8_t*)src, (uint8_t*)src + 10, 5));
+
+  memoryFree(src);
+  memoryFree(dest);
+}
+
+static void test_memoryMove(void **state) {
+  (void)state;
+
+  // Create some memory
+  size_t size = 15;
+  void *ptr = memoryAllocate(size + 5); // Extra space for overlap
+  assert_non_null(ptr);
+
+  // Initialize memory with known pattern
+  for(size_t i = 0; i < size + 5; i++) {
+    ((uint8_t*)ptr)[i] = (uint8_t)(i + 1); // 1, 2, ..., size+5
+  }
+
+  // Move overlapping region: from ptr[0..14] to ptr[5..19]
+  memoryMove((uint8_t*)ptr + 5, ptr, size);
+
+  // Expected pattern after move
+  uint8_t expected[20];
+  for(size_t i = 0; i < 5; i++) {
+    expected[i] = (uint8_t)(i + 1); // Original first 5 bytes
+  }
+  for(size_t i = 5; i < 20; i++) {
+    expected[i] = (uint8_t)(i - 4); // Moved bytes
+  }
+  assert_memory_equal(ptr, expected, size + 5);
+
+  // Cannot move to NULL
+  expect_assert_failure(memoryMove(NULL, ptr, size));
+
+  // Cannot move from NULL
+  expect_assert_failure(memoryMove(ptr, NULL, size));
+
+  // Cannot move 0 bytes
+  expect_assert_failure(memoryMove(ptr, ptr, 0));
+
+  // Cannot move to itself
+  expect_assert_failure(memoryMove(ptr, ptr, size));
+
+  memoryFree(ptr);
+}
+
+static void test_memoryCompare(void **state) {
+  (void)state;
+
+  // Create two memory blocks
+  size_t size = 8;
+  void *a = memoryAllocate(size);
+  void *b = memoryAllocate(size);
+  assert_non_null(a);
+  assert_non_null(b);
+
+  // Initialize both with same data
+  for(size_t i = 0; i < size; i++) {
+    ((uint8_t*)a)[i] = (uint8_t)(i + 1);
+    ((uint8_t*)b)[i] = (uint8_t)(i + 1);
+  }
+
+  // They should be equal
+  assert_int_equal(memoryCompare(a, b, size), 0);
+
+  // Change b and compare again
+  ((uint8_t*)b)[size - 1] = 0xFF;
+  assert_true(memoryCompare(a, b, size) < 0);
+
+  // Change a and compare again
+  ((uint8_t*)a)[size - 1] = 0xFF;
+  ((uint8_t*)a)[size - 2] = 0xFE;
+  assert_true(memoryCompare(a, b, size) > 0);
+
+  // CAnnot compare with NULL a
+  expect_assert_failure(memoryCompare(NULL, b, size));
+
+  // Cannot compare with NULL b
+  expect_assert_failure(memoryCompare(a, NULL, size));
+
+  // Comparing with self always equal
+  assert_int_equal(memoryCompare(a, a, size), 0);
+  assert_int_equal(memoryCompare(b, b, size), 0);
+
+  // Cannot compare 0 bytes
+  expect_assert_failure(memoryCompare(a, b, 0));
+
+  memoryFree(a);
+  memoryFree(b);
+}
+
+static void test_memoryReallocate(void **state) {
+  (void)state;
+
+  size_t initialSize = 16;
+  void *ptr = memoryAllocate(initialSize);
+  assert_non_null(ptr);
+
+  // Reallocate to a larger size
+  size_t newSize = 32;
+  memoryReallocate(&ptr, newSize);
+  assert_non_null(ptr);
+
+  // Reallocate to a smaller size
+  size_t smallerSize = 8;
+  memoryReallocate(&ptr, smallerSize);
+  assert_non_null(ptr);
+
+  // Cannot realloc to size 0
+  expect_assert_failure(memoryReallocate(&ptr, 0));
+
+  // Cannot realloc NULL pointer
+  expect_assert_failure(memoryReallocate(NULL, 16));
+
+  // Cannot reallocate more memory than possible
+  expect_assert_failure(memoryReallocate(&ptr, SIZE_MAX));
+
+  // All we really care about is that the pointer is valid after reallocations
+  memoryFree(ptr);
+}
+
+static void test_memoryResize(void **state) {
+  (void)state;
+
+  size_t initialSize = 32;
+  void *ptr = memoryAllocate(initialSize);
+  assert_non_null(ptr);
+
+  // Initialize memory
+  for(size_t i = 0; i < initialSize; i++) {
+    ((uint8_t*)ptr)[i] = (uint8_t)(i + 1);
+  }
+
+  // Equal size shouldn't touch the pointer
+  void *oldPtr = ptr;
+  memoryResize(&ptr, initialSize, initialSize);
+  assert_non_null(ptr);
+  assert_ptr_equal(ptr, oldPtr);
+
+  // Reallocate to a larger size
+  size_t newSize = 64;
+  memoryResize(&ptr, initialSize, newSize);
+  assert_non_null(ptr);
+
+  // Check that old data is preserved
+  for(size_t i = 0; i < initialSize; i++) {
+    assert_int_equal(((uint8_t*)ptr)[i], (uint8_t)(i + 1));
+  }
+
+  // Reallocate to a smaller size
+  size_t smallerSize = 16;
+  memoryResize(&ptr, newSize, smallerSize);
+  assert_non_null(ptr);
+
+  // Check that data is still correct up to the smaller size
+  for(size_t i = 0; i < smallerSize; i++) {
+    assert_int_equal(((uint8_t*)ptr)[i], (uint8_t)(i + 1));
+  }
+
+  // Cannot realloc to size 0
+  expect_assert_failure(memoryResize(&ptr, smallerSize, 0));
+
+  // Cannot take NULL
+  expect_assert_failure(memoryResize(NULL, smallerSize, 16));
+
+  // memoryResize with oldsize of 0 not possible
+  expect_assert_failure(memoryResize(&ptr, 0, 16));
+  
+  // Cannot resize more memory than possible
+  expect_assert_failure(memoryResize(&ptr, smallerSize, SIZE_MAX));
+
+  memoryFree(ptr);
+}
+
+int main(int argc, char **argv) {
+  const struct CMUnitTest tests[] = {
+    cmocka_unit_test(test_memoryAllocate),
+    cmocka_unit_test(test_memoryFree),
+    cmocka_unit_test(test_memoryCopy),
+    cmocka_unit_test(test_memorySet),
+    cmocka_unit_test(test_memoryZero),
+    cmocka_unit_test(test_memoryCopyRangeSafe),
+    cmocka_unit_test(test_memoryMove),
+    cmocka_unit_test(test_memoryCompare),
+    cmocka_unit_test(test_memoryReallocate),
+    cmocka_unit_test(test_memoryResize),
+  };
+  return cmocka_run_group_tests(tests, NULL, NULL);
+}