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LibJS: Add %TypedArray%.prototype.some
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3 changed files with 86 additions and 0 deletions
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@ -1,5 +1,6 @@
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/*
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* Copyright (c) 2020-2021, Linus Groh <linusg@serenityos.org>
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* Copyright (c) 2021, Luke Wilde <lukew@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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@ -30,6 +31,7 @@ void TypedArrayPrototype::initialize(GlobalObject& object)
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define_native_function(vm.names.find, find, 1, attr);
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define_native_function(vm.names.findIndex, find_index, 1, attr);
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define_native_function(vm.names.forEach, for_each, 1, attr);
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define_native_function(vm.names.some, some, 1, attr);
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}
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TypedArrayPrototype::~TypedArrayPrototype()
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@ -179,6 +181,20 @@ JS_DEFINE_NATIVE_FUNCTION(TypedArrayPrototype::for_each)
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return js_undefined();
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}
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// 23.2.3.25 %TypedArray%.prototype.some ( callbackfn [ , thisArg ] ), https://tc39.es/ecma262/#sec-%typedarray%.prototype.some
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JS_DEFINE_NATIVE_FUNCTION(TypedArrayPrototype::some)
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{
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auto result = false;
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for_each_item(vm, global_object, "some", [&](auto, auto, auto callback_result) {
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if (callback_result.to_boolean()) {
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result = true;
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return IterationDecision::Break;
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}
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return IterationDecision::Continue;
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});
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return Value(result);
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}
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// 23.2.3.1 get %TypedArray%.prototype.buffer, https://tc39.es/ecma262/#sec-get-%typedarray%.prototype.buffer
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JS_DEFINE_NATIVE_GETTER(TypedArrayPrototype::buffer_getter)
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{
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@ -1,5 +1,6 @@
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/*
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* Copyright (c) 2020-2021, Linus Groh <linusg@serenityos.org>
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* Copyright (c) 2021, Luke Wilde <lukew@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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@ -29,6 +30,7 @@ private:
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JS_DECLARE_NATIVE_FUNCTION(find);
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JS_DECLARE_NATIVE_FUNCTION(find_index);
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JS_DECLARE_NATIVE_FUNCTION(for_each);
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JS_DECLARE_NATIVE_FUNCTION(some);
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};
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}
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@ -0,0 +1,68 @@
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const TYPED_ARRAYS = [
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Uint8Array,
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Uint16Array,
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Uint32Array,
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Int8Array,
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Int16Array,
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Int32Array,
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Float32Array,
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Float64Array,
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];
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const BIGINT_TYPED_ARRAYS = [BigUint64Array, BigInt64Array];
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test("length is 1", () => {
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TYPED_ARRAYS.forEach(T => {
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expect(T.prototype.some).toHaveLength(1);
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});
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BIGINT_TYPED_ARRAYS.forEach(T => {
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expect(T.prototype.some).toHaveLength(1);
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});
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});
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describe("errors", () => {
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function errorTests(T) {
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test(`requires at least one argument (${T.name})`, () => {
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expect(() => {
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new T().some();
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}).toThrowWithMessage(
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TypeError,
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"TypedArray.prototype.some() requires at least one argument"
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);
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});
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test(`callback must be a function (${T.name})`, () => {
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expect(() => {
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new T().some(undefined);
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}).toThrowWithMessage(TypeError, "undefined is not a function");
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});
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}
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TYPED_ARRAYS.forEach(T => errorTests(T));
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BIGINT_TYPED_ARRAYS.forEach(T => errorTests(T));
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});
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test("basic functionality", () => {
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TYPED_ARRAYS.forEach(T => {
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const typedArray = new T([2, 4, 6]);
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expect(typedArray.some(value => value === 2)).toBeTrue();
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expect(typedArray.some(value => value === 4)).toBeTrue();
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expect(typedArray.some(value => value === 6)).toBeTrue();
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expect(typedArray.some(value => value % 2 === 0)).toBeTrue();
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expect(typedArray.some(value => value % 2 === 1)).toBeFalse();
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expect(typedArray.some(value => value < 2)).toBeFalse();
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expect(typedArray.some(value => value > 2)).toBeTrue();
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});
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BIGINT_TYPED_ARRAYS.forEach(T => {
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const typedArray = new T([2n, 4n, 6n]);
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expect(typedArray.some(value => value === 2n)).toBeTrue();
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expect(typedArray.some(value => value === 4n)).toBeTrue();
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expect(typedArray.some(value => value === 6n)).toBeTrue();
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expect(typedArray.some(value => value % 2n === 0n)).toBeTrue();
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expect(typedArray.some(value => value % 2n === 1n)).toBeFalse();
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expect(typedArray.some(value => value < 2n)).toBeFalse();
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expect(typedArray.some(value => value > 2n)).toBeTrue();
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});
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});
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