overleaf/services/web/test/frontend/shared/hooks/use-callback-handlers.test.js

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import sinon from 'sinon'
import { renderHook } from '@testing-library/react-hooks'
import useCallbackHandlers from '../../../../frontend/js/shared/hooks/use-callback-handlers'
describe('useCallbackHandlers', function () {
it('adds, removes and calls all handlers without duplicate', async function () {
const handler1 = sinon.stub()
const handler2 = sinon.stub()
const handler3 = sinon.stub()
const { result } = renderHook(() => useCallbackHandlers())
result.current.addHandler(handler1)
result.current.deleteHandler(handler1)
result.current.addHandler(handler1)
result.current.addHandler(handler2)
result.current.deleteHandler(handler2)
result.current.addHandler(handler3)
result.current.addHandler(handler3)
result.current.callHandlers('foo')
result.current.callHandlers(1337)
sinon.assert.calledTwice(handler1)
sinon.assert.calledWith(handler1, 'foo')
sinon.assert.calledWith(handler1, 1337)
sinon.assert.notCalled(handler2)
sinon.assert.calledTwice(handler3)
})
})