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LibJS: Implement Atomics.sub

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Timothy Flynn 2021-07-11 13:28:52 -04:00 • committed by Linus Groh
parent f9d8e234b2
commit d2f6255b91
3 changed files with 94 additions and 0 deletions
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74
Userland/Libraries/LibJS/Tests/builtins/Atomics/Atomics.sub.js Normal file
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test("invariants", () => {
expect(Atomics.sub).toHaveLength(3);
});
test("error cases", () => {
expect(() => {
Atomics.sub("not an array", 0, 1);
}).toThrow(TypeError);
expect(() => {
const bad_array_type = new Float32Array(4);
Atomics.sub(bad_array_type, 0, 1);
}).toThrow(TypeError);
expect(() => {
const bad_array_type = new Uint8ClampedArray(4);
Atomics.sub(bad_array_type, 0, 1);
}).toThrow(TypeError);
expect(() => {
const array = new Int32Array(4);
Atomics.sub(array, 100, 1);
}).toThrow(RangeError);
});
test("basic functionality (non-BigInt)", () => {
[Int8Array, Int16Array, Int32Array, Uint8Array, Uint16Array, Uint32Array].forEach(ArrayType => {
const array = new ArrayType(4);
array[0] = 1;
array[1] = 2;
array[2] = 3;
array[3] = 4;
expect(Atomics.sub(array, 0, 1)).toBe(1);
expect(array).toEqual([0, 2, 3, 4]);
expect(Atomics.sub(array, 1, 1)).toBe(2);
expect(array).toEqual([0, 1, 3, 4]);
expect(Atomics.sub(array, 1, 1)).toBe(1);
expect(array).toEqual([0, 0, 3, 4]);
expect(Atomics.sub(array, 2, 3.14)).toBe(3);
expect(array).toEqual([0, 0, 0, 4]);
expect(Atomics.sub(array, 3, "1")).toBe(4);
expect(array).toEqual([0, 0, 0, 3]);
});
});
test("basic functionality (BigInt)", () => {
[BigInt64Array, BigUint64Array].forEach(ArrayType => {
const array = new ArrayType(4);
array[0] = 1n;
array[1] = 2n;
array[2] = 3n;
array[3] = 4n;
expect(Atomics.sub(array, 0, 1n)).toBe(1n);
expect(array).toEqual([0n, 2n, 3n, 4n]);
expect(Atomics.sub(array, 1, 1n)).toBe(2n);
expect(array).toEqual([0n, 1n, 3n, 4n]);
expect(Atomics.sub(array, 1, 1n)).toBe(1n);
expect(array).toEqual([0n, 0n, 3n, 4n]);
expect(Atomics.sub(array, 2, 3n)).toBe(3n);
expect(array).toEqual([0n, 0n, 0n, 4n]);
expect(Atomics.sub(array, 3, 1n)).toBe(4n);
expect(array).toEqual([0n, 0n, 0n, 3n]);
});
});