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LibJS: Implement Number.prototype.valueOf()
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5 changed files with 51 additions and 13 deletions
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@ -75,7 +75,10 @@ describe("correct behavior", () => {
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test("errors", () => {
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test("must be called with numeric |this|", () => {
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[true, [], {}, Symbol("foo"), "bar", 1n].forEach(value => {
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expect(() => Number.prototype.toString.call(value)).toThrow(TypeError);
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expect(() => Number.prototype.toString.call(value)).toThrowWithMessage(
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TypeError,
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"Number.prototype.toString() called with incompatible this target"
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);
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});
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});
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@ -0,0 +1,21 @@
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describe("correct behavior", () => {
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test("length", () => {
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expect(Number.prototype.valueOf).toHaveLength(0);
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});
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test("basic functionality", () => {
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expect(new Number(42).valueOf()).toBe(42);
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expect(Number.prototype.valueOf.call(42)).toBe(42);
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});
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});
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test("errors", () => {
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test("must be called with numeric |this|", () => {
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[true, [], {}, Symbol("foo"), "bar", 1n].forEach(value => {
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expect(() => Number.prototype.valueOf.call(value)).toThrowWithMessage(
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TypeError,
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"Number.prototype.valueOf() called with incompatible this target"
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);
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});
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});
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});
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