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53 lines
1.6 KiB
53 lines
1.6 KiB
2 years ago
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import { describe, expect, it, jest } from '@jest/globals'
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import { AbortController, AbortSignal } from './AbortController.js'
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function flushInstantTimeouts () {
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return new Promise(resolve => setTimeout(resolve, 0))
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}
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describe('AbortController', () => {
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it('has the expected shape', () => {
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const controller = new AbortController()
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expect(typeof controller.abort).toBe('function')
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expect(controller.signal).toBeInstanceOf(AbortSignal)
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})
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it('emits "abort" when abort() is called', async () => {
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const controller = new AbortController()
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const callback = jest.fn()
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controller.signal.addEventListener('abort', callback)
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controller.abort()
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await flushInstantTimeouts()
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expect(callback).toHaveBeenCalled()
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expect(callback.mock.calls[0][0]).toBeInstanceOf(Event)
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})
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it('add and remove events', async () => {
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const controller = new AbortController()
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const callback = jest.fn()
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const callback2 = jest.fn()
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controller.signal.addEventListener('abort', callback)
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controller.signal.addEventListener('abort', callback2)
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controller.signal.removeEventListener('abort', callback)
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controller.abort()
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await flushInstantTimeouts()
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expect(callback2).toHaveBeenCalled()
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expect(callback2.mock.calls[0][0]).toBeInstanceOf(Event)
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expect(callback).not.toHaveBeenCalled()
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})
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it('sets `signal.aborted` property when abort() is called', () => {
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const controller = new AbortController()
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expect(controller.signal.aborted).toBe(false)
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controller.abort()
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expect(controller.signal.aborted).toBe(true)
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})
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})
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