| 1 | const { AbortController, AbortSignal } = require('./AbortController')
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| 2 |
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| 3 | function flushInstantTimeouts () {
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| 4 | return new Promise(resolve => setTimeout(resolve, 0))
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| 5 | }
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| 6 |
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| 7 | describe('AbortController', () => {
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| 8 | it('has the expected shape', () => {
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| 9 | const controller = new AbortController()
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| 10 | expect(typeof controller.abort).toBe('function')
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| 11 | expect(controller.signal).toBeInstanceOf(AbortSignal)
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| 12 | })
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| 13 |
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| 14 | it('emits "abort" when abort() is called', async () => {
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| 15 | const controller = new AbortController()
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| 16 | const callback = jest.fn()
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| 17 |
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| 18 | controller.signal.addEventListener('abort', callback)
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| 19 | controller.abort()
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| 20 |
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| 21 | await flushInstantTimeouts()
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| 22 |
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| 23 | expect(callback).toHaveBeenCalled()
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| 24 | expect(callback.mock.calls[0][0]).toBeInstanceOf(Event)
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| 25 | })
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| 26 |
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| 27 | it('add and remove events', async () => {
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| 28 | const controller = new AbortController()
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| 29 | const callback = jest.fn()
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| 30 | const callback2 = jest.fn()
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| 31 |
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| 32 | controller.signal.addEventListener('abort', callback)
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| 33 | controller.signal.addEventListener('abort', callback2)
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| 34 | controller.signal.removeEventListener('abort', callback)
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| 35 | controller.abort()
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| 36 |
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| 37 | await flushInstantTimeouts()
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| 38 |
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| 39 | expect(callback2).toHaveBeenCalled()
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| 40 | expect(callback2.mock.calls[0][0]).toBeInstanceOf(Event)
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| 41 | expect(callback).not.toHaveBeenCalled()
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| 42 | })
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| 43 |
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| 44 | it('sets `signal.aborted` property when abort() is called', () => {
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| 45 | const controller = new AbortController()
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| 46 |
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| 47 | expect(controller.signal.aborted).toBe(false)
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| 48 | controller.abort()
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| 49 | expect(controller.signal.aborted).toBe(true)
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| 50 | })
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| 51 | })
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