Add tests for CreateByeDataBlock (#663)

Ensure that all bytes of newly-created Data Block are initialized to
zero.
This commit is contained in:
jugglinmike 2016-06-03 12:38:03 -04:00 committed by Leo Balter
parent 30fa3b36d0
commit 07dcff3e27
2 changed files with 89 additions and 0 deletions

View File

@ -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: size0.
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');

View File

@ -0,0 +1,54 @@
// 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-typedarray-length
description: All bytes are initialized to zero
info: >
22.2.4.2 TypedArray ( length )
This description applies only if the TypedArray function is called with at
least one argument and the Type of the first argument is not Object.
...
8. Return ? AllocateTypedArray(constructorName, NewTarget,
%TypedArrayPrototype%, elementLength).
22.2.4.2.1 Runtime Semantics: AllocateTypedArray (constructorName, newTarget,
defaultProto [ , length ])
5. If length was not passed, then
...
6. Else,
a. Perform ? AllocateTypedArrayBuffer(obj, length).
22.2.4.2.2 Runtime Semantics: AllocateTypedArrayBuffer
7. Let data be ? AllocateArrayBuffer(%ArrayBuffer%, byteLength).
24.1.1.1 AllocateArrayBuffer
3. Let block be ? CreateByteDataBlock(byteLength).
6.2.6.1 CreateByteDataBlock
1. Assert: size0.
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.
includes: [testTypedArray.js]
---*/
testWithTypedArrayConstructors(function(TA) {
var subject = new TA(9);
assert.sameValue(subject[0], 0, 'index 0');
assert.sameValue(subject[1], 0, 'index 1');
assert.sameValue(subject[2], 0, 'index 2');
assert.sameValue(subject[3], 0, 'index 3');
assert.sameValue(subject[4], 0, 'index 4');
assert.sameValue(subject[5], 0, 'index 5');
assert.sameValue(subject[6], 0, 'index 6');
assert.sameValue(subject[7], 0, 'index 7');
assert.sameValue(subject[8], 0, 'index 8');
});