Fix DataView constructor and byte accessors.

tests/html/typed_arrays_dataview_test.dart

Index: tests/html/typed_arrays_dataview_test.dart
diff --git a/tests/html/typed_arrays_dataview_test.dart b/tests/html/typed_arrays_dataview_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..c1c641c9f4bda878672510cf9beb24d7650cfca3
--- /dev/null
+++ b/tests/html/typed_arrays_dataview_test.dart
@@ -0,0 +1,70 @@
+// 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_dataview_test');
+#import('../../lib/unittest/unittest.dart');
+#import('../../lib/unittest/html_config.dart');
+#import('dart:html');
+
+main() {
+  useHtmlConfiguration();
+
+  test('access8', () {
+      var a1 = new Uint8Array.fromList([0,0,3,255,0,0,0,0,0,0]);
+
+      var dv = new DataView(a1.buffer, 2, 6);
+
+      expect(dv.getInt8(0), equals(3));
+      expect(dv.getInt8(1), equals(-1));
+      expect(dv.getUint8(0), equals(3));
+      expect(dv.getUint8(1), equals(255));
+
+      dv.setInt8(2, -56);
+      expect(dv.getInt8(2), equals(-56));
+      expect(dv.getUint8(2), equals(200));
+
+      dv.setUint8(3, 200);

[vsm, 2012/06/15 19:40:27]

What happens now on a set with a value > 8 bits?  Just take the lower 8 bits?  I
think that is the JS behavior.

+      expect(dv.getInt8(3), equals(-56));
+      expect(dv.getUint8(3), equals(200));
+  });
+
+  test('access16', () {
+      var a1 = new Uint8Array.fromList([0,0,3,255,0,0,0,0,0,0]);
+
+      var dv = new DataView(a1.buffer, 2);
+
+      expect(dv.byteLength, equals(10 - 2));
+
+      expect(dv.getInt16(0), equals(1023));
+      expect(dv.getInt16(0, false), equals(1023));
+      expect(dv.getInt16(0, littleEndian: false), equals(1023));
+      expect(dv.getInt16(0, true), equals(-253));
+      expect(dv.getInt16(0, littleEndian: true), equals(-253));
+
+      expect(dv.getUint16(0), equals(1023));
+      expect(dv.getUint16(0, littleEndian: false), equals(1023));
+      expect(dv.getUint16(0, littleEndian: true), equals(0xFF03));
+
+      dv.setInt16(2, -1);
+      expect(dv.getInt16(2), equals(-1));
+      expect(dv.getUint16(2), equals(0xFFFF));
+  });
+
+  test('access32', () {
+      var a1 = new Uint8Array.fromList([0,0,3,255,0,0,0,0,0,0]);
+
+      var dv = new DataView(a1.buffer);
+
+      expect(dv.getInt32(0), equals(1023));
+      expect(dv.getInt32(0, false), equals(1023));
+      expect(dv.getInt32(0, littleEndian: false), equals(1023));
+      expect(dv.getInt32(0, true), equals(-0xFD0000));
+      expect(dv.getInt32(0, littleEndian: true), equals(-0xFD0000));
+
+      expect(dv.getUint32(0), equals(1023));
+      expect(dv.getUint32(0, littleEndian: false), equals(1023));
+      expect(dv.getUint32(0, littleEndian: true), equals(0xFF030000));
+  });
+
+}