67 lines
2.4 KiB
JavaScript
67 lines
2.4 KiB
JavaScript
test("basic functionality", () => {
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expect(ArrayBuffer).toHaveLength(1);
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expect(ArrayBuffer.name).toBe("ArrayBuffer");
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expect(ArrayBuffer.prototype.constructor).toBe(ArrayBuffer);
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expect(new ArrayBuffer()).toBeInstanceOf(ArrayBuffer);
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expect(typeof new ArrayBuffer()).toBe("object");
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});
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test("ArrayBuffer constructor must be invoked with 'new'", () => {
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expect(() => {
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ArrayBuffer();
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}).toThrowWithMessage(TypeError, "ArrayBuffer constructor must be called with 'new'");
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});
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describe("resizable array buffer", () => {
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test("construct with options", () => {
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expect(new ArrayBuffer(5, { maxByteLength: 5 })).toBeInstanceOf(ArrayBuffer);
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});
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test("resizable when provided max byte length", () => {
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expect(new ArrayBuffer(1).resizable).toEqual(false);
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expect(new ArrayBuffer(1, {}).resizable).toEqual(false);
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expect(new ArrayBuffer(1, { maxByteLength: undefined }).resizable).toEqual(false);
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expect(new ArrayBuffer(1, { maxByteLength: 1 }).resizable).toEqual(true);
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});
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test("byte length must be shorter than max byte length", () => {
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expect(() => {
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new ArrayBuffer(1, { maxByteLength: 0 });
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}).toThrowWithMessage(RangeError, "Byte length exceeds maxByteLength option");
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});
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test("max byte length cannot be too large", () => {
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expect(() => {
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new ArrayBuffer(0, { maxByteLength: 9007199254740992 });
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}).toThrowWithMessage(RangeError, "Index must be a positive integer");
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});
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test("max byte length cannot be negative", () => {
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expect(() => {
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new ArrayBuffer(0, { maxByteLength: -1 });
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}).toThrowWithMessage(RangeError, "Index must be a positive integer");
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});
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test("invalid max byte length object", () => {
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expect(() => {
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new ArrayBuffer(0, {
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maxByteLength: {
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toString: function () {
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return {};
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},
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valueOf: function () {
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return {};
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},
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},
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});
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}).toThrowWithMessage(TypeError, "Cannot convert object to number");
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expect(() => {
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new ArrayBuffer(0, {
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get maxByteLength() {
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throw "Exception";
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},
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});
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}).toThrow();
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});
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});
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