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LibJS: Implement Temporal.Calendar.prototype.fields()
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describe("correct behavior", () => {
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test("length is 1", () => {
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expect(Temporal.Calendar.prototype.fields).toHaveLength(1);
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});
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test("basic functionality", () => {
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const calendar = new Temporal.Calendar("iso8601");
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const array = ["foo", "bar", "baz"];
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const fields = calendar.fields(array);
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expect(fields).toEqual(array);
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expect(fields).not.toBe(array);
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});
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});
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describe("errors", () => {
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test("this value must be a Temporal.Calendar object", () => {
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expect(() => {
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Temporal.Calendar.prototype.fields.call("foo");
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}).toThrowWithMessage(TypeError, "Not a Temporal.Calendar");
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});
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test("iterator values must be strings", () => {
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const calendar = new Temporal.Calendar("iso8601");
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for (const value of [123, null, undefined, true, {}]) {
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expect(() => {
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calendar.fields([value]);
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}).toThrowWithMessage(TypeError, "FIXME: Add a string for this error.");
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}
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});
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});
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