ArrayBuffer constructor

tests/html/typed_arrays_arraybuffer_test.dart

Index: tests/html/typed_arrays_arraybuffer_test.dart
diff --git a/tests/html/typed_arrays_arraybuffer_test.dart b/tests/html/typed_arrays_arraybuffer_test.dart
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+// 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('typed_arrays_arraybuffer_test');
+#import('../../lib/unittest/unittest.dart');
+#import('../../lib/unittest/html_config.dart');
+#import('dart:html');
+
+main() {
+  useHtmlConfiguration();
+
+  test('constructor', () {
+      var a = new ArrayBuffer(100);
+      expect(a.byteLength, 100);
+  });
+
+  test('slice1', () {
+      var a = new ArrayBuffer(100);
+      var s = a.slice(10, 40);
+      expect(s.byteLength, 30);
+  });
+
+  test('slice2', () {
+      var a = new ArrayBuffer(100);
+      var s = a.slice(10, 400);
+      expect(s.byteLength, 90);  // indexes clamped to valid range.
+  });
+
+  test('slice3', () {
+      var a = new ArrayBuffer(100);
+      var s = a.slice(50, 10);
+      expect(s.byteLength, 0);   // end before start becomes empty range.
+  });
+
+  test('slice4', () {
+      var a = new ArrayBuffer(100);
+      var s = a.slice(-90, -30);
+      expect(s.byteLength, 60);  // negative indexes measure from end.
+  });
+}