31 lines
588 B
TypeScript
31 lines
588 B
TypeScript
import * as emitter from '@/scripts/event'
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test('add listener and emit event', () => {
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const mockA1 = jest.fn()
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const mockA2 = jest.fn()
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const mockB = jest.fn()
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emitter.on('a', mockA1)
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emitter.on('a', mockA2)
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emitter.on('b', mockB)
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emitter.emit('a')
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expect(mockA1).toBeCalledTimes(1)
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expect(mockA2).toBeCalledTimes(1)
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expect(mockB).not.toBeCalled()
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})
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test('not throw for un-existed event', () => {
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emitter.emit('c')
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})
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test('unsubscribe event', () => {
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const mock = jest.fn()
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const off = emitter.on('c', mock)
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off()
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expect(mock).not.toBeCalled()
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})
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