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// Copyright 2015 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Test that the methods for different TypedArray types have the same
// identity.
'use strict';
let typedArrayConstructors = [
Uint8Array,
Int8Array,
Uint16Array,
Int16Array,
Uint32Array,
Int32Array,
Uint8ClampedArray,
Float32Array,
Float64Array];
let TypedArray = Uint8Array.__proto__;
let TypedArrayPrototype = TypedArray.prototype;
assertEquals(TypedArray.__proto__, Function.prototype);
assertEquals(TypedArrayPrototype.__proto__, Object.prototype);
// There are extra own class properties due to it simply being a function
let classProperties = new Set([
"length", "name", "arguments", "caller", "prototype", "BYTES_PER_ELEMENT"
]);
let instanceProperties = new Set([
"BYTES_PER_ELEMENT", "constructor", "prototype",
// length is also an instance property as a temporary workaround to
// BUG(chromium:579905). TODO(littledan): remove the workaround
"length"
]);
function functionProperties(object) {
return Object.getOwnPropertyNames(object).filter(function(name) {
return typeof Object.getOwnPropertyDescriptor(object, name).value
== "function" && name != 'constructor';
});
}
let typedArrayMethods = functionProperties(Uint8Array.prototype);
let typedArrayClassMethods = functionProperties(Uint8Array);
for (let constructor of typedArrayConstructors) {
for (let property of Object.getOwnPropertyNames(constructor.prototype)) {
assertTrue(instanceProperties.has(property), property);
}
for (let property of Object.getOwnPropertyNames(constructor)) {
assertTrue(classProperties.has(property), property);
}
}
// Abstract %TypedArray% class can't be constructed directly
assertThrows(() => new TypedArray(), TypeError);
// The "prototype" property is nonconfigurable, nonenumerable, nonwritable,
// both for %TypedArray% and for all subclasses
let desc = Object.getOwnPropertyDescriptor(TypedArray, "prototype");
assertFalse(desc.writable);
assertFalse(desc.configurable);
assertFalse(desc.enumerable);
for (let constructor of typedArrayConstructors) {
let desc = Object.getOwnPropertyDescriptor(constructor, "prototype");
assertFalse(desc.writable);
assertFalse(desc.configurable);
assertFalse(desc.enumerable);
}
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