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Diffstat (limited to 'js/src/tests/test262/built-ins/TypedArrayConstructors/ctors/buffer-arg/toindex-byteoffset.js')
-rw-r--r-- | js/src/tests/test262/built-ins/TypedArrayConstructors/ctors/buffer-arg/toindex-byteoffset.js | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/TypedArrayConstructors/ctors/buffer-arg/toindex-byteoffset.js b/js/src/tests/test262/built-ins/TypedArrayConstructors/ctors/buffer-arg/toindex-byteoffset.js new file mode 100644 index 0000000000..66a3629446 --- /dev/null +++ b/js/src/tests/test262/built-ins/TypedArrayConstructors/ctors/buffer-arg/toindex-byteoffset.js @@ -0,0 +1,88 @@ +// 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-buffer-byteoffset-length +description: > + ToIndex(byteOffset) operations +info: | + 22.2.4.5 TypedArray ( buffer [ , byteOffset [ , length ] ] ) + + This description applies only if the TypedArray function is called with at + least one argument and the Type of the first argument is Object and that + object has an [[ArrayBufferData]] internal slot. + + ... + 7. Let offset be ? ToIndex(byteOffset). + 8. If offset modulo elementSize ≠ 0, throw a RangeError exception. + ... +includes: [testTypedArray.js] +features: [TypedArray] +---*/ + +var buffer = new ArrayBuffer(16); + +var obj1 = { + valueOf: function() { + return 8; + } +}; + +var obj2 = { + toString: function() { + return 8; + } +}; + +var items = [ + [-0, 0, "-0"], + [obj1, 8, "object's valueOf"], + [obj2, 8, "object's toString"], + ["", 0, "the Empty string"], + ["0", 0, "string '0'"], + ["8", 8, "string '8'"], + [false, 0, "false"], + [NaN, 0, "NaN"], + [null, 0, "null"], + [undefined, 0, "undefined"], + [0.1, 0, "0.1"], + [0.9, 0, "0.9"], + [8.1, 8, "8.1"], + [8.9, 8, "8.9"], + [-0.1, 0, "-0.1"], + [-0.99999, 0, "-0.99999"] +]; + +testWithTypedArrayConstructors(function(TA) { + items.forEach(function(item) { + var offset = item[0]; + var expected = item[1]; + var name = item[2]; + + var typedArray = new TA(buffer, offset); + assert.sameValue(typedArray.byteOffset, expected, name + " byteOffset"); + assert.sameValue(typedArray.constructor, TA, name + " constructor"); + assert.sameValue( + Object.getPrototypeOf(typedArray), + TA.prototype, + name + " prototype" + ); + }); + + // Testing `true`. See step 8 + if (TA.BYTES_PER_ELEMENT === 1) { + var typedArray = new TA(buffer, true); + assert.sameValue(typedArray.byteOffset, 1, "true => 1 byteOffset"); + assert.sameValue(typedArray.constructor, TA, "true => 1 constructor"); + assert.sameValue( + Object.getPrototypeOf(typedArray), + TA.prototype, + "true => 1 prototype" + ); + } else { + assert.throws(RangeError, function() { + new TA(buffer, true); + }, "1 modulo elementSize ≠ 0, throws a RangeError"); + } +}); + +reportCompare(0, 0); |