59 lines
2 KiB
JavaScript
59 lines
2 KiB
JavaScript
describe("errors", () => {
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test("first argument must be coercible to object", () => {
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expect(() => {
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new AggregateError();
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}).toThrowWithMessage(TypeError, "ToObject on null or undefined");
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});
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test("@@iterator throws", () => {
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expect(() => {
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new AggregateError({
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[Symbol.iterator]() {
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throw Error("oops!");
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},
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});
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}).toThrowWithMessage(Error, "oops!");
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});
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});
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describe("normal behavior", () => {
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test("length is 2", () => {
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expect(AggregateError).toHaveLength(2);
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});
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test("name is AggregateError", () => {
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expect(AggregateError.name).toBe("AggregateError");
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});
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test("Prototype of the AggregateError constructor is the Error constructor", () => {
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expect(Object.getPrototypeOf(AggregateError)).toBe(Error);
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});
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test("Prototype of AggregateError.prototype is Error.prototype", () => {
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expect(Object.getPrototypeOf(AggregateError.prototype)).toBe(Error.prototype);
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});
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test("basic functionality", () => {
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expect(AggregateError([])).toBeInstanceOf(AggregateError);
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expect(new AggregateError([])).toBeInstanceOf(AggregateError);
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expect(new AggregateError([]).toString()).toBe("AggregateError");
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expect(new AggregateError([], "Foo").toString()).toBe("AggregateError: Foo");
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expect(new AggregateError([]).hasOwnProperty("errors")).toBeTrue();
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const errors = [1, 2, 3];
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expect(new AggregateError(errors).errors).toEqual(errors);
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expect(new AggregateError(errors).errors).not.toBe(errors);
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expect(
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new AggregateError({
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[Symbol.iterator]: (i = 0) => ({
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next() {
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if (i < 3) {
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i++;
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return { value: i };
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}
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return { value: null, done: true };
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},
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}),
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}).errors
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).toEqual(errors);
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});
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});
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