Add tests for CreateByeDataBlock (#663)

Ensure that all bytes of newly-created Data Block are initialized to
zero.

1 files changed, 35 insertions, 0 deletions

diff --git a/test/built-ins/ArrayBuffer/init-zero.js b/test/built-ins/ArrayBuffer/init-zero.js
new file mode 100644
index 000000000..734e5d8fe
--- /dev/null
+++ b/test/built-ins/ArrayBuffer/init-zero.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-arraybuffer-length
+es6id: 24.1.1.1
+description: All bytes are initialized to zero
+info: |
+    [...]
+    5. Return ? AllocateArrayBuffer(NewTarget, byteLength).
+
+    24.1.1.1 AllocateArrayBuffer
+
+    3. Let block be ? CreateByteDataBlock(byteLength).
+
+    6.2.6.1 CreateByteDataBlock
+
+    1. Assert: size≥0.
+    2. Let db be a new Data Block value consisting of size bytes. If it is
+       impossible to create such a Data Block, throw a RangeError exception.
+    3. Set all of the bytes of db to 0.
+    4. Return db. 
+features: [DataView]
+---*/
+
+var view = new DataView(new ArrayBuffer(9));
+
+assert.sameValue(view.getUint8(0), 0, 'index 0');
+assert.sameValue(view.getUint8(1), 0, 'index 1');
+assert.sameValue(view.getUint8(2), 0, 'index 2');
+assert.sameValue(view.getUint8(3), 0, 'index 3');
+assert.sameValue(view.getUint8(4), 0, 'index 4');
+assert.sameValue(view.getUint8(5), 0, 'index 5');
+assert.sameValue(view.getUint8(6), 0, 'index 6');
+assert.sameValue(view.getUint8(7), 0, 'index 7');
+assert.sameValue(view.getUint8(8), 0, 'index 8');