First step towards implementing dart:typeddata library.

tests/standalone/typed_data_test.dart

+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+//
+// Dart test program for testing typed data.
+
+// Library tag to be able to run in html test framework.
+library TypedDataTest;
+
+import 'dart:typeddata';
+
+void testCreateUint8TypedData() {
+  Uint8List typed_data;
+
+  typed_data = new Uint8List(0);
+  Expect.isTrue(typed_data is Uint8List);
+  Expect.isFalse(typed_data is Uint8ClampedList);
+  Expect.equals(0, typed_data.length);
+
+  typed_data = new Uint8List(10);
+  Expect.equals(10, typed_data.length);
+  for (int i = 0; i < 10; i++) {
+    Expect.equals(0, typed_data[i]);
+  }
+}
+
+void testCreateClampedUint8TypedData() {
+  Uint8ClampedList typed_data;
+
+  typed_data = new Uint8ClampedList(0);
+  Expect.isTrue(typed_data is Uint8ClampedList);
+  Expect.isFalse(typed_data is Uint8List);
+  Expect.equals(0, typed_data.length);
+  Expect.equals(0, typed_data.lengthInBytes());
+
+  typed_data = new Uint8ClampedList(10);
+  Expect.equals(10, typed_data.length);
+  for (int i = 0; i < 10; i++) {
+    Expect.equals(0, typed_data[i]);
+  }
+}
+
+void testCreateExternalClampedUint8TypedData() {
+  List typed_data;
+
+  typed_data = new Uint8ClampedList.transferable(0);
+  Expect.isTrue(typed_data is Uint8ClampedList);
+  Expect.isFalse(typed_data is Uint8List);
+  Expect.equals(0, typed_data.length);
+  Expect.equals(0, typed_data.lengthInBytes());
+
+  typed_data = new Uint8ClampedList.transferable(10);
+  Expect.equals(10, typed_data.length);
+  for (int i = 0; i < 10; i++) {
+    Expect.equals(0, typed_data[i]);
+  }
+
+  typed_data[0] = -1;
+  Expect.equals(0, typed_data[0]);
+  
+
+  for (int i = 0; i < 10; i++) {
+    typed_data[i] = i + 250;
+  }
+  for (int i = 0; i < 10; i++) {
+    Expect.equals(i + 250 > 255 ? 255 : i + 250, typed_data[i]);
+  }
+}
+
+void testTypedDataRange(bool check_throws) {
+  Int8List typed_data;
+  typed_data = new Int8List(10);
+  typed_data[1] = 0;
+  Expect.equals(0, typed_data[1]);
+  typed_data[2] = -128;
+  Expect.equals(-128, typed_data[2]);
+  typed_data[3] = 127;
+  Expect.equals(127, typed_data[3]);
+  // This should eventually throw.
+  typed_data[0] = 128;
+  typed_data[4] = -129;
+  if (check_throws) {
+    Expect.throws(() {
+      typed_data[1] = 1.2;
+    });
+  }
+}
+
+void testUnsignedTypedDataRange(bool check_throws) {
+  Uint8List typed_data;
+  typed_data = new Uint8List(10);
+
+  typed_data[1] = 255;
+  Expect.equals(255, typed_data[1]);
+  typed_data[1] = 0;
+  Expect.equals(0, typed_data[1]);
+
+  for (int i = 0; i < typed_data.length; i++) {
+    typed_data[i] = i;
+  }
+  for (int i = 0; i < typed_data.length; i++) {
+    Expect.equals(i, typed_data[i]);
+  }
+
+  // These should eventually throw.
+  typed_data[1] = 256;
+  typed_data[1] = -1;
+  typed_data[2] = -129;
+  if (check_throws) {
+    Expect.throws(() {
+      typed_data[1] = 1.2;
+    });
+  }
+}
+
+void testClampedUnsignedTypedDataRangeHelper(Uint8ClampedList typed_data,
+                                             bool check_throws) {
+  Uint8ClampedList typed_data;
+  typed_data = new Uint8ClampedList(10);
+
+  typed_data[1] = 255;
+  Expect.equals(255, typed_data[1]);
+  typed_data[1] = 0;
+  Expect.equals(0, typed_data[1]);
+  for (int i = 0; i < typed_data.length; i++) {
+    typed_data[i] = i;
+  }
+  for (int i = 0; i < typed_data.length; i++) {
+    Expect.equals(i, typed_data[i]);
+  }
+
+  // These should eventually throw.
+  typed_data[1] = 256;
+  typed_data[2] = -129;
+  Expect.equals(255, typed_data[1]);
+  Expect.equals(0, typed_data[2]);
+}
+
+void testClampedUnsignedTypedDataRange(bool check_throws) {
+  testClampedUnsignedTypedDataRangeHelper(new Uint8ClampedList(10),
+                                          check_throws);
+}
+
+void testExternalClampedUnsignedTypedDataRange(bool check_throws) {
+  testClampedUnsignedTypedDataRangeHelper(new Uint8ClampedList.transferable(10),
+                                          check_throws);
+}
+
+void testSetRangeHelper(typed_data) {
+  List<int> list = [10, 11, 12];
+  typed_data.setRange(0, 3, list);
+  for (int i = 0; i < 3; i++) {
+    Expect.equals(10 + i, typed_data[i]);
+  }
+
+  typed_data[0] = 20;
+  typed_data[1] = 21;
+  typed_data[2] = 22;
+  list.setRange(0, 3, typed_data);
+  for (int i = 0; i < 3; i++) {
+    Expect.equals(20 + i, list[i]);
+  }
+
+  typed_data.setRange(1, 2, const [8, 9]);
+  Expect.equals(20, typed_data[0]);
+  Expect.equals(8, typed_data[1]);
+  Expect.equals(9, typed_data[2]);
+}
+
+void testSetRange() {
+  testSetRangeHelper(new Uint8List(3));
+  testSetRangeHelper(new Uint8List.transferable(3));
+  testSetRangeHelper(new Uint8ClampedList(3));
+  testSetRangeHelper(new Uint8ClampedList.transferable(3));
+}
+
+void testIndexOutOfRangeHelper(typed_data) {
+  List<int> list = const [0, 1, 2, 3];
+
+  Expect.throws(() {
+    typed_data.setRange(0, 4, list);
+  });
+
+  Expect.throws(() {
+    typed_data.setRange(3, 1, list);
+  });
+}
+
+void testIndexOutOfRange() {
+  testIndexOutOfRangeHelper(new Uint8List(3));
+  testIndexOutOfRangeHelper(new Uint8List.transferable(3));
+  testIndexOutOfRangeHelper(new Uint8ClampedList(3));
+  testIndexOutOfRangeHelper(new Uint8ClampedList.transferable(3));
+}
+
+void testIndexOfHelper(list) {
+  for (int i = 0; i < list.length; i++) {
+    list[i] = i + 10;
+  }
+  Expect.equals(0, list.indexOf(10));
+  Expect.equals(5, list.indexOf(15));
+  Expect.equals(9, list.indexOf(19));
+  Expect.equals(-1, list.indexOf(20));
+
+  list = new Float32List(10);
+  for (int i = 0; i < list.length; i++) {
+    list[i] = i + 10.0;
+  }
+  Expect.equals(0, list.indexOf(10.0));
+  Expect.equals(5, list.indexOf(15.0));
+  Expect.equals(9, list.indexOf(19.0));
+  Expect.equals(-1, list.indexOf(20.0));
+}
+
+void testIndexOf() {
+  testIndexOfHelper(new Uint8List(10));
+  testIndexOfHelper(new Uint8List.transferable(10));
+  testIndexOfHelper(new Uint8ClampedList(10));
+  testIndexOfHelper(new Uint8ClampedList.transferable(10));
+}
+
+void testSubArrayHelper(list) {
+  var array = new ByteData.view(list.buffer);
+  Expect.equals(0, array.subByteData(0, 0).lengthInBytes());
+  Expect.equals(0, array.subByteData(5, 0).lengthInBytes());
+  Expect.equals(0, array.subByteData(10, 0).lengthInBytes());
+  Expect.equals(0, array.subByteData(10).lengthInBytes());
+  Expect.equals(0, array.subByteData(10, null).lengthInBytes());
+  Expect.equals(5, array.subByteData(0, 5).lengthInBytes());
+  Expect.equals(5, array.subByteData(5, 5).lengthInBytes());
+  Expect.equals(5, array.subByteData(5).lengthInBytes());
+  Expect.equals(5, array.subByteData(5, null).lengthInBytes());
+  Expect.equals(10, array.subByteData(0, 10).lengthInBytes());
+  Expect.equals(10, array.subByteData(0).lengthInBytes());
+  Expect.equals(10, array.subByteData(0, null).lengthInBytes());
+  Expect.equals(10, array.subByteData().lengthInBytes());
+  testThrowsIndex(function) {
+    Expect.throws(function, (e) => e is RangeError);
+  }
+  testThrowsIndex(() => array.subByteData(0, -1));
+  testThrowsIndex(() => array.subByteData(1, -1));
+  testThrowsIndex(() => array.subByteData(10, -1));
+  testThrowsIndex(() => array.subByteData(-1, 0));
+  testThrowsIndex(() => array.subByteData(-1));
+  testThrowsIndex(() => array.subByteData(-1, null));
+  testThrowsIndex(() => array.subByteData(11, 0));
+  testThrowsIndex(() => array.subByteData(11));
+  testThrowsIndex(() => array.subByteData(11, null));
+  testThrowsIndex(() => array.subByteData(6, 5));
+
+  bool checkedMode = false;
+  assert(checkedMode = true);
+  if (!checkedMode) {
+    // In checked mode these will necessarily throw a TypeError.
+    Expect.throws(() => array.subByteData(0, "5"), (e) => e is ArgumentError);
+    Expect.throws(() => array.subByteData("0", 5), (e) => e is ArgumentError);
+    Expect.throws(() => array.subByteData("0"), (e) => e is ArgumentError);
+  }
+  Expect.throws(() => array.subByteData(null), (e) => e is ArgumentError);
+}
+
+void testSubArray() {
+  testSubArrayHelper(new Uint8List(10));
+  testSubArrayHelper(new Uint8List.transferable(10));
+  testSubArrayHelper(new Uint8ClampedList(10));
+  testSubArrayHelper(new Uint8ClampedList.transferable(10));
+}
+
+main() {
+  for (int i = 0; i < 2000; i++) {
+    testCreateUint8TypedData();
+    testCreateClampedUint8TypedData();
+    testCreateExternalClampedUint8TypedData();
+    testTypedDataRange(false);
+    testUnsignedTypedDataRange(false);
+    testClampedUnsignedTypedDataRange(false);
+    testExternalClampedUnsignedTypedDataRange(false);
+    testSetRange();
+    testIndexOutOfRange();
+    testIndexOf();
+    testSubArray();
+  }
+  testTypedDataRange(true);
+  testUnsignedTypedDataRange(true);
+  testExternalClampedUnsignedTypedDataRange(true);
+}
+