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LibJS: Add %TypedArray%.prototype.some

This commit is contained in:
Luke 2021-06-18 17:27:07 +01:00 committed by Linus Groh
parent 68f11a272b
commit 8be7bdaac3
3 changed files with 86 additions and 0 deletions

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@ -1,5 +1,6 @@
/*
* Copyright (c) 2020-2021, Linus Groh <linusg@serenityos.org>
* Copyright (c) 2021, Luke Wilde <lukew@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -30,6 +31,7 @@ void TypedArrayPrototype::initialize(GlobalObject& object)
define_native_function(vm.names.find, find, 1, attr);
define_native_function(vm.names.findIndex, find_index, 1, attr);
define_native_function(vm.names.forEach, for_each, 1, attr);
define_native_function(vm.names.some, some, 1, attr);
}
TypedArrayPrototype::~TypedArrayPrototype()
@ -179,6 +181,20 @@ JS_DEFINE_NATIVE_FUNCTION(TypedArrayPrototype::for_each)
return js_undefined();
}
// 23.2.3.25 %TypedArray%.prototype.some ( callbackfn [ , thisArg ] ), https://tc39.es/ecma262/#sec-%typedarray%.prototype.some
JS_DEFINE_NATIVE_FUNCTION(TypedArrayPrototype::some)
{
auto result = false;
for_each_item(vm, global_object, "some", [&](auto, auto, auto callback_result) {
if (callback_result.to_boolean()) {
result = true;
return IterationDecision::Break;
}
return IterationDecision::Continue;
});
return Value(result);
}
// 23.2.3.1 get %TypedArray%.prototype.buffer, https://tc39.es/ecma262/#sec-get-%typedarray%.prototype.buffer
JS_DEFINE_NATIVE_GETTER(TypedArrayPrototype::buffer_getter)
{

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@ -1,5 +1,6 @@
/*
* Copyright (c) 2020-2021, Linus Groh <linusg@serenityos.org>
* Copyright (c) 2021, Luke Wilde <lukew@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -29,6 +30,7 @@ private:
JS_DECLARE_NATIVE_FUNCTION(find);
JS_DECLARE_NATIVE_FUNCTION(find_index);
JS_DECLARE_NATIVE_FUNCTION(for_each);
JS_DECLARE_NATIVE_FUNCTION(some);
};
}

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@ -0,0 +1,68 @@
const TYPED_ARRAYS = [
Uint8Array,
Uint16Array,
Uint32Array,
Int8Array,
Int16Array,
Int32Array,
Float32Array,
Float64Array,
];
const BIGINT_TYPED_ARRAYS = [BigUint64Array, BigInt64Array];
test("length is 1", () => {
TYPED_ARRAYS.forEach(T => {
expect(T.prototype.some).toHaveLength(1);
});
BIGINT_TYPED_ARRAYS.forEach(T => {
expect(T.prototype.some).toHaveLength(1);
});
});
describe("errors", () => {
function errorTests(T) {
test(`requires at least one argument (${T.name})`, () => {
expect(() => {
new T().some();
}).toThrowWithMessage(
TypeError,
"TypedArray.prototype.some() requires at least one argument"
);
});
test(`callback must be a function (${T.name})`, () => {
expect(() => {
new T().some(undefined);
}).toThrowWithMessage(TypeError, "undefined is not a function");
});
}
TYPED_ARRAYS.forEach(T => errorTests(T));
BIGINT_TYPED_ARRAYS.forEach(T => errorTests(T));
});
test("basic functionality", () => {
TYPED_ARRAYS.forEach(T => {
const typedArray = new T([2, 4, 6]);
expect(typedArray.some(value => value === 2)).toBeTrue();
expect(typedArray.some(value => value === 4)).toBeTrue();
expect(typedArray.some(value => value === 6)).toBeTrue();
expect(typedArray.some(value => value % 2 === 0)).toBeTrue();
expect(typedArray.some(value => value % 2 === 1)).toBeFalse();
expect(typedArray.some(value => value < 2)).toBeFalse();
expect(typedArray.some(value => value > 2)).toBeTrue();
});
BIGINT_TYPED_ARRAYS.forEach(T => {
const typedArray = new T([2n, 4n, 6n]);
expect(typedArray.some(value => value === 2n)).toBeTrue();
expect(typedArray.some(value => value === 4n)).toBeTrue();
expect(typedArray.some(value => value === 6n)).toBeTrue();
expect(typedArray.some(value => value % 2n === 0n)).toBeTrue();
expect(typedArray.some(value => value % 2n === 1n)).toBeFalse();
expect(typedArray.some(value => value < 2n)).toBeFalse();
expect(typedArray.some(value => value > 2n)).toBeTrue();
});
});