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33 lines
1.3 KiB
JavaScript
33 lines
1.3 KiB
JavaScript
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test("Error.isError length is 1", () => {
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expect(Error.isError).toHaveLength(1);
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});
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test("Error.isError arguments that evaluate to false", () => {
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expect(Error.isError()).toBeFalse();
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expect(Error.isError("1")).toBeFalse();
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expect(Error.isError("foo")).toBeFalse();
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expect(Error.isError(1)).toBeFalse();
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expect(Error.isError(1, 2, 3)).toBeFalse();
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expect(Error.isError(undefined)).toBeFalse();
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expect(Error.isError(null)).toBeFalse();
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expect(Error.isError(Infinity)).toBeFalse();
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expect(Error.isError({})).toBeFalse();
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});
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test("Error.isError arguments that evaluate to true", () => {
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expect(Error.isError(new Error())).toBeTrue();
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expect(Error.isError(new EvalError())).toBeTrue();
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expect(Error.isError(new RangeError())).toBeTrue();
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expect(Error.isError(new ReferenceError())).toBeTrue();
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expect(Error.isError(new SyntaxError())).toBeTrue();
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expect(Error.isError(new TypeError())).toBeTrue();
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expect(Error.isError(new URIError())).toBeTrue();
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expect(Error.isError(new SuppressedError())).toBeTrue();
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class MySuppressedError extends SuppressedError {}
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expect(Error.isError(new MySuppressedError())).toBeTrue();
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class MyTypeError extends TypeError {}
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expect(Error.isError(new MyTypeError())).toBeTrue();
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});
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