describe("errors", () => { test("called on non-TypedArray", () => { expect(() => { Atomics.notify(Symbol.hasInstance, 0, 0); }).toThrowWithMessage(TypeError, "Not an object of type TypedArray"); }); test("detached buffer", () => { expect(() => { const typedArray = new Int32Array(4); detachArrayBuffer(typedArray.buffer); Atomics.notify(typedArray, 0, 0); }).toThrowWithMessage( TypeError, "TypedArray contains a property which references a value at an index not contained within its buffer's bounds" ); }); test("invalid TypedArray type", () => { expect(() => { const typedArray = new Float32Array(4); Atomics.notify(typedArray, 0, 0); }).toThrowWithMessage( TypeError, "Typed array Float32Array element type is not Int32 or BigInt64" ); }); test("invalid index", () => { expect(() => { const buffer = new SharedArrayBuffer(4 * Int32Array.BYTES_PER_ELEMENT); const typedArray = new Int32Array(buffer); Atomics.notify(typedArray, 4, 0); }).toThrowWithMessage(RangeError, "Index 4 is out of range of array length 4"); }); test("invalid count", () => { expect(() => { const buffer = new SharedArrayBuffer(4 * Int32Array.BYTES_PER_ELEMENT); const typedArray = new Int32Array(buffer); Atomics.notify(typedArray, 0, Symbol.hasInstance); }).toThrowWithMessage(TypeError, "Cannot convert symbol to number"); }); }); test("basic functionality", () => { test("invariants", () => { expect(Atomics.notify).toHaveLength(3); }); test("non-shared ArrayBuffer", () => { const typedArray = new Int32Array(4); const waiters = Atomics.notify(typedArray, 0, 0); expect(waiters).toBe(0); }); });