Implement Iterator interface and Array iterators (#2640)

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu

tests/jerry/es2015/array-prototype-entries.js

@@ -0,0 +1,94 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+try {
+  Array.prototype.entries.call (undefined);
+  assert (false);
+} catch (e) {
+  assert (e instanceof TypeError)
+}
+
+var array = ['a', "foo", 1, 1.5, true, {} ,[], function f () { }];
+
+var iterator = array.entries ();
+
+var current_item = iterator.next ();
+
+for (var i = 0; i < array.length; i++) {
+  assert (current_item.value[0] === i);
+  assert (current_item.value[1] === array[i]);
+  assert (current_item.done === false);
+
+  current_item = iterator.next ();
+}
+
+assert (current_item.value === undefined);
+assert (current_item.done === true);
+
+function foo_error () {
+  throw new ReferenceError ("foo");
+}
+
+array = [1, 2, 3, 4, 5, 6, 7];
+
+['0', '3', '5'].forEach (function (e) {
+  Object.defineProperty (array, e, { 'get' : foo_error });
+})
+
+iterator = array.entries ();
+
+var expected_values = [2, 3, 5, 7];
+var expected_indices = [1, 2, 4, 6];
+var expected_values_idx = 0;
+
+for (var i = 0; i < array.length; i++) {
+  try {
+    current_item = iterator.next ();
+    assert (current_item.value[0] === expected_indices[expected_values_idx]);
+    assert (current_item.value[1] === expected_values[expected_values_idx]);
+    assert (current_item.done === false);
+    expected_values_idx++;
+  } catch (e) {
+    assert (e instanceof ReferenceError);
+    assert (e.message === "foo");
+  }
+}
+
+current_item = iterator.next ();
+assert (current_item.value === undefined);
+assert (current_item.done === true);
+
+/* Test empty array */
+array = [];
+
+iterator = array.entries ();
+current_item = iterator.next ();
+
+assert (current_item.value === undefined);
+assert (current_item.done === true);
+
+/* Test delete elements after the iterator has been constructed */
+
+array = [0, 1, 2, 3, 4, 5];
+iterator = array.entries ();
+
+for (var i = 0; i < array.length; i++) {
+  current_item = iterator.next ();
+  assert (current_item.value[0] === i);
+  assert (current_item.value[1] === array[i]);
+  assert (current_item.done === false);
+  array.pop();
+}
+
+assert ([].entries ().toString () === "[object Array Iterator]");

tests/jerry/es2015/array-prototype-keys.js

@@ -0,0 +1,86 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+try {
+  Array.prototype.keys.call (undefined);
+  assert (false);
+} catch (e) {
+  assert (e instanceof TypeError)
+}
+
+var array = ['a', "foo", 1, 1.5, true, {} ,[], function f () { }];
+
+var iterator = array.keys ();
+
+var current_item = iterator.next ();
+
+for (var i = 0; i < array.length; i++) {
+  assert (current_item.value === i);
+  assert (current_item.done === false);
+
+  current_item = iterator.next ();
+}
+
+assert (current_item.value === undefined);
+assert (current_item.done === true);
+
+function foo_error () {
+  throw new ReferenceError ("foo");
+}
+
+array = [1, 2, 3, 4, 5, 6, 7];
+
+['0', '3', '5'].forEach (function (e) {
+  Object.defineProperty (array, e, { 'get' : foo_error });
+})
+
+iterator = array.keys ();
+
+for (var i = 0; i < array.length; i++) {
+  try {
+    current_item = iterator.next ();
+    assert (current_item.value === i);
+    assert (current_item.done === false);
+  } catch (e) {
+    assert (e instanceof ReferenceError);
+    assert (e.message === "foo");
+  }
+}
+
+current_item = iterator.next ();
+assert (current_item.value === undefined);
+assert (current_item.done === true);
+
+/* Test empty array */
+array = [];
+
+iterator = array.keys ();
+current_item = iterator.next ();
+
+assert (current_item.value === undefined);
+assert (current_item.done === true);
+
+/* Test delete elements after the iterator has been constructed */
+
+array = [0, 1, 2, 3, 4, 5];
+iterator = array.keys ();
+
+for (var i = 0; i < array.length; i++) {
+  current_item = iterator.next ();
+  assert (current_item.value === i);
+  assert (current_item.done === false);
+  array.pop();
+}
+
+assert ([].keys ().toString () === "[object Array Iterator]");

tests/jerry/es2015/array-prototype-values.js

@@ -0,0 +1,100 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+try {
+  Array.prototype.values.call (undefined);
+  assert (false);
+} catch (e) {
+  assert (e instanceof TypeError)
+}
+
+var array = ['a', "foo", 1, 1.5, true, {} ,[], function f () { }];
+
+var iterator = array.values ();
+
+/* The initial value of the @@iterator property is the same function object
+   as the initial value of the Array.prototype.values property. */
+var symbol_iterator = array[Symbol.iterator] ();
+
+var current_item = iterator.next ();
+var symbol_current_item = symbol_iterator.next ();
+
+for (var i = 0; i < array.length; i++) {
+  assert (current_item.value === array[i]);
+  assert (current_item.done === false);
+
+  assert (current_item.value === symbol_current_item.value);
+  assert (current_item.done === symbol_current_item.done);
+
+  current_item = iterator.next ();
+  symbol_current_item = symbol_iterator.next ();
+}
+
+assert (current_item.value === undefined);
+assert (current_item.done === true);
+assert (current_item.value === symbol_current_item.value);
+assert (current_item.done === symbol_current_item.done);
+
+function foo_error () {
+  throw new ReferenceError ("foo");
+}
+
+array = [1, 2, 3, 4, 5, 6, 7];
+
+['0', '3', '5'].forEach (function (e) {
+  Object.defineProperty (array, e, { 'get' : foo_error });
+})
+
+iterator = array.values ();
+
+var expected_values = [2, 3, 5, 7];
+var expected_values_idx = 0;
+
+for (var i = 0; i < array.length; i++) {
+  try {
+    current_item = iterator.next ();
+    assert (current_item.value === expected_values[expected_values_idx++]);
+    assert (current_item.done === false);
+  } catch (e) {
+    assert (e instanceof ReferenceError);
+    assert (e.message === "foo");
+  }
+}
+
+current_item = iterator.next ();
+assert (current_item.value === undefined);
+assert (current_item.done === true);
+
+/* Test empty array */
+array = [];
+
+iterator = array.values ();
+current_item = iterator.next ();
+
+assert (current_item.value === undefined);
+assert (current_item.done === true);
+
+/* Test delete elements after the iterator has been constructed */
+
+array = [0, 1, 2, 3, 4, 5];
+iterator = array.values ();
+
+for (var i = 0; i < array.length; i++) {
+  current_item = iterator.next ();
+  assert (current_item.value === array[i]);
+  assert (current_item.done === false);
+  array.pop();
+}
+
+assert ([].values ().toString () === "[object Array Iterator]");

tests/jerry/es2015/iterator-prototype.js

@@ -0,0 +1,21 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+var array = [];
+var array_iterator = array[Symbol.iterator]();
+var array_iterator_prototype = Object.getPrototypeOf (array_iterator);
+var iterator_prototype = Object.getPrototypeOf (array_iterator_prototype);
+var iterator_prototype_iterator = iterator_prototype[Symbol.iterator]();
+
+assert (iterator_prototype === iterator_prototype_iterator);