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// Copyright 2018 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.
// Flags: --allow-natives-syntax
var typedArrayConstructors = [
Uint8Array,
Int8Array,
Uint16Array,
Int16Array,
Uint32Array,
Int32Array,
Uint8ClampedArray,
Float32Array,
Float64Array];
function TestTypedArrayFilter(constructor) {
assertEquals(1, constructor.prototype.filter.length);
// Throw type error if source array is detached while executing a callback
let ta1 = new constructor(10);
assertThrows(() =>
ta1.filter(() => %ArrayBufferNeuter(ta1.buffer))
, TypeError);
// A new typed array should be created after finishing callbacks
var speciesCreated = 0;
class MyTypedArray extends constructor {
static get [Symbol.species]() {
return function() {
speciesCreated++;
return new constructor(10);
};
}
}
new MyTypedArray(10).filter(() => {
assertEquals(0, speciesCreated);
return true;
});
assertEquals(1, speciesCreated);
// A new typed array should be initialized to 0s
class LongTypedArray extends constructor {
static get [Symbol.species]() {
return function(len) {
return new constructor(len * 2);
}
}
}
let ta2 = new LongTypedArray(3).fill(1);
let ta3 = ta2.filter((val, index, array) => val > 0);
assertArrayEquals(ta3, [1, 1, 1, 0, 0, 0]);
assertEquals(ta3.constructor, constructor);
// Throw if a new typed array is too small
class ShortTypedArray extends constructor {
static get [Symbol.species]() {
return function(len) {
return new constructor(len/2);
}
}
}
assertThrows(() => new ShortTypedArray(10).filter(() => true));
// Throw if callback is not callable
assertThrows(() => new constructor(10).filter(123));
assertThrows(() => new constructor(10).filter({}));
// Empty result
assertEquals(new constructor(10).filter(() => false), new constructor(0));
// If a new typed array shares a buffer with a source array
let ab = new ArrayBuffer(100);
class SharedBufferTypedArray extends constructor {
static get [Symbol.species]() {
return function(len) {
return new constructor(ab, 0, 5);
}
}
}
let ta4 = new SharedBufferTypedArray(ab, 0, 5).fill(1);
let ta5 = ta4.filter(() => {
ta4[0] = 123;
ta4[2] = 123;
return true;
});
assertEquals(ta4.buffer, ta5.buffer);
assertArrayEquals(ta4, [1, 1, 123, 1, 1]);
assertArrayEquals(ta5, [1, 1, 123, 1, 1]);
// If a new typed array has a different type with source array
for (let j = 0; j < typedArrayConstructors.length; j++) {
let otherConstructor = typedArrayConstructors[j];
class OtherTypedArray extends constructor {
static get [Symbol.species]() {
return function(len) {
return new otherConstructor(len);
}
}
}
let ta6 = new OtherTypedArray(10).fill(123);
assertEquals(ta6.filter(() => true), new otherConstructor(10).fill(123));
}
}
for (i = 0; i < typedArrayConstructors.length; i++) {
TestTypedArrayFilter(typedArrayConstructors[i]);
}
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