Typed array constructors with optional buffer offset and length.

client/tests/client/html/TypedArrays2Test.dart

Index: client/tests/client/html/TypedArrays2Test.dart
diff --git a/client/tests/client/html/TypedArrays2Test.dart b/client/tests/client/html/TypedArrays2Test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..0e3fc2786a9897aa88887534eac754d09ffa6c08
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+++ b/client/tests/client/html/TypedArrays2Test.dart
@@ -0,0 +1,78 @@
+// Copyright (c) 2012, 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.
+
+#library('TypedArrays2Test');
+#import('../../../../lib/unittest/unittest_html.dart');
+#import('dart:html');
+
+main() {
+
+  forLayoutTests();
+
+  test('fromBufferTest_var', () {
+      var a1 = new Uint8Array(1024);
+      for (int i = 0; i < a1.length; i++) {
+        a1[i] = i; // 0,1,2,...,254,255,0,1,2,...
+      }
+
+      var a2 = new Uint32Array.fromBuffer(a1.buffer);
+      Expect.equals(1024 ~/ 4, a2.length);
+      Expect.equals(0x03020100, a2[0]);
+      Expect.equals(0x07060504, a2[1]);
+      Expect.equals(0x0B0A0908, a2[2]);
+      Expect.equals(0xCBCAC9C8, a2[50]);
+      Expect.equals(0xCFCECDCC, a2[51]);
+      Expect.equals(0x03020100, a2[64]);
+
+      a2 = new Uint32Array.fromBuffer(a1.buffer, 200);
+      Expect.equals((1024 - 200) ~/ 4, a2.length);
+      Expect.equals(0xCBCAC9C8, a2[0]);
+      Expect.equals(0xCFCECDCC, a2[1]);
+      Expect.equals(0x03020100, a2[14]);
+
+      a2 = new Uint32Array.fromBuffer(a1.buffer, 456, 20);
+      Expect.equals(20, a2.length);
+      Expect.equals(0xCBCAC9C8, a2[0]);
+      Expect.equals(0xCFCECDCC, a2[1]);
+      Expect.equals(0x03020100, a2[14]);
+
+      a2 = new Uint32Array.fromBuffer(a1.buffer, length: 30, byteOffset: 456);
+      Expect.equals(30, a2.length);
+      Expect.equals(0xCBCAC9C8, a2[0]);
+      Expect.equals(0xCFCECDCC, a2[1]);
+      Expect.equals(0x03020100, a2[14]);
+  });
+
+  test('fromBufferTest_typed', () {
+      Uint8Array a1 = new Uint8Array(1024);
+      for (int i = 0; i < a1.length; i++) {
+        a1[i] = i;
+      }
+
+      Uint32Array a2 = new Uint32Array.fromBuffer(a1.buffer);
+      Expect.equals(1024 ~/ 4, a2.length);
+      Expect.equals(0x03020100, a2[0]);
+      Expect.equals(0xCBCAC9C8, a2[50]);
+      Expect.equals(0xCFCECDCC, a2[51]);
+      Expect.equals(0x03020100, a2[64]);
+
+      a2 = new Uint32Array.fromBuffer(a1.buffer, 200);
+      Expect.equals((1024 - 200) ~/ 4, a2.length);
+      Expect.equals(0xCBCAC9C8, a2[0]);
+      Expect.equals(0xCFCECDCC, a2[1]);
+      Expect.equals(0x03020100, a2[14]);
+
+      a2 = new Uint32Array.fromBuffer(a1.buffer, 456, 20);
+      Expect.equals(20, a2.length);
+      Expect.equals(0xCBCAC9C8, a2[0]);
+      Expect.equals(0xCFCECDCC, a2[1]);
+      Expect.equals(0x03020100, a2[14]);
+
+      a2 = new Uint32Array.fromBuffer(a1.buffer, length: 30, byteOffset: 456);
+      Expect.equals(30, a2.length);
+      Expect.equals(0xCBCAC9C8, a2[0]);
+      Expect.equals(0xCFCECDCC, a2[1]);
+      Expect.equals(0x03020100, a2[14]);
+  });
+}