Adds tests for Custom Event polyfill
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title: Adds tests for custom event polyfill
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merge_request: 7996
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author:
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//= require lib/utils/custom_event_polyfill
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describe('Custom Event Polyfill', () => {
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it('should be defined', () => {
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expect(window.CustomEvent).toBeDefined();
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});
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it('should create a `CustomEvent` instance', () => {
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const e = new window.CustomEvent('foo');
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expect(e.type).toEqual('foo');
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expect(e.bubbles).toBe(false);
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expect(e.cancelable).toBe(false);
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expect(e.detail).toBe(null);
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});
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it('should create a `CustomEvent` instance with a `details` object', () => {
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const e = new window.CustomEvent('bar', { detail: { foo: 'bar' } });
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expect(e.type).toEqual('bar');
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expect(e.bubbles).toBe(false);
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expect(e.cancelable).toBe(false);
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expect(e.detail.foo).toEqual('bar');
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});
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it('should create a `CustomEvent` instance with a `bubbles` boolean', () => {
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const e = new window.CustomEvent('bar', { bubbles: true });
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expect(e.type).toEqual('bar');
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expect(e.bubbles).toBe(true);
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expect(e.cancelable).toBe(false);
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expect(e.detail).toBe(null);
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});
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it('should create a `CustomEvent` instance with a `cancelable` boolean', () => {
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const e = new window.CustomEvent('bar', { cancelable: true });
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expect(e.type).toEqual('bar');
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expect(e.bubbles).toBe(false);
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expect(e.cancelable).toBe(true);
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expect(e.detail).toBe(null);
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});
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});
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