64 lines
2 KiB
JavaScript
64 lines
2 KiB
JavaScript
test("invariants", () => {
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expect(Atomics.compareExchange).toHaveLength(4);
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});
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test("error cases", () => {
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expect(() => {
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Atomics.compareExchange("not an array", 0, 0, 0);
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}).toThrow(TypeError);
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expect(() => {
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const bad_array_type = new Float32Array(4);
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Atomics.compareExchange(bad_array_type, 0, 0, 0);
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}).toThrow(TypeError);
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expect(() => {
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const bad_array_type = new Uint8ClampedArray(4);
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Atomics.compareExchange(bad_array_type, 0, 0, 0);
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}).toThrow(TypeError);
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expect(() => {
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const array = new Int32Array(4);
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Atomics.compareExchange(array, 100, 0, 0);
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}).toThrow(RangeError);
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});
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test("basic functionality (non-BigInt)", () => {
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[Int8Array, Int16Array, Int32Array, Uint8Array, Uint16Array, Uint32Array].forEach(ArrayType => {
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const array = new ArrayType(2);
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array[0] = 1;
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array[1] = 2;
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expect(Atomics.compareExchange(array, 0, 0, 5)).toBe(1);
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expect(array).toEqual([1, 2]);
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expect(Atomics.compareExchange(array, 0, 1, "5")).toBe(1);
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expect(array).toEqual([5, 2]);
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expect(Atomics.compareExchange(array, 0, "5", 6)).toBe(5);
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expect(array).toEqual([6, 2]);
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expect(Atomics.compareExchange(array, 1, 2, 3.14)).toBe(2);
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expect(array).toEqual([6, 3]);
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});
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});
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test("basic functionality (BigInt)", () => {
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[BigInt64Array, BigUint64Array].forEach(ArrayType => {
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const array = new ArrayType(2);
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array[0] = 1n;
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array[1] = 2n;
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expect(Atomics.compareExchange(array, 0, 0n, 5n)).toBe(1n);
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expect(array).toEqual([1n, 2n]);
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expect(Atomics.compareExchange(array, 0, 1n, 5n)).toBe(1n);
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expect(array).toEqual([5n, 2n]);
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expect(Atomics.compareExchange(array, 0, 5n, 6n)).toBe(5n);
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expect(array).toEqual([6n, 2n]);
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expect(Atomics.compareExchange(array, 1, 2n, 3n)).toBe(2n);
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expect(array).toEqual([6n, 3n]);
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});
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});
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