34 lines
895 B
JavaScript
34 lines
895 B
JavaScript
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import { createFakeDateClass, DEFAULT_ARGS, useRealDate } from './fake_date';
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describe('spec/helpers/fake_date', () => {
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describe('createFakeDateClass', () => {
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let FakeDate;
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beforeAll(() => {
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useRealDate();
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});
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beforeEach(() => {
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FakeDate = createFakeDateClass(DEFAULT_ARGS);
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});
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it('should use default args', () => {
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expect(new FakeDate()).toEqual(new Date(...DEFAULT_ARGS));
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expect(FakeDate()).toEqual(Date(...DEFAULT_ARGS));
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});
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it('should have deterministic now()', () => {
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expect(FakeDate.now()).not.toBe(Date.now());
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expect(FakeDate.now()).toBe(new Date(...DEFAULT_ARGS).getTime());
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});
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it('should be instanceof Date', () => {
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expect(new FakeDate()).toBeInstanceOf(Date);
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});
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it('should be instanceof self', () => {
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expect(new FakeDate()).toBeInstanceOf(FakeDate);
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});
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});
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});
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