From 07dcff3e276be59bf134cd8fdb46bd7d16bee61e Mon Sep 17 00:00:00 2001
From: jugglinmike <mike@mikepennisi.com>
Date: Fri, 3 Jun 2016 12:38:03 -0400
Subject: [PATCH] Add tests for CreateByeDataBlock (#663)
Ensure that all bytes of newly-created Data Block are initialized to
zero.
---
test/built-ins/ArrayBuffer/init-zero.js | 35 ++++++++++++
.../TypedArrays/length-arg-init-zeros.js | 54 +++++++++++++++++++
2 files changed, 89 insertions(+)
create mode 100644 test/built-ins/ArrayBuffer/init-zero.js
create mode 100644 test/built-ins/TypedArrays/length-arg-init-zeros.js
diff --git a/test/built-ins/ArrayBuffer/init-zero.js b/test/built-ins/ArrayBuffer/init-zero.js
new file mode 100644
index 0000000000..734e5d8fed
--- /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');
diff --git a/test/built-ins/TypedArrays/length-arg-init-zeros.js b/test/built-ins/TypedArrays/length-arg-init-zeros.js
new file mode 100644
index 0000000000..a62f7519be
--- /dev/null
+++ b/test/built-ins/TypedArrays/length-arg-init-zeros.js
@@ -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: 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.
+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');
+});
--
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