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useQuery.test.js
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useQuery.test.js
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import {
render,
act,
waitForElement,
fireEvent,
} from '@testing-library/react'
import * as React from 'react'
import { useQuery, queryCache } from '../index'
import { sleep } from './utils'
describe('useQuery', () => {
afterEach(() => {
queryCache.clear()
})
// See https://github.com/tannerlinsley/react-query/issues/105
it('should allow to set default data value', async () => {
function Page() {
const { data = 'default' } = useQuery('test', async () => {
await sleep(10)
return 'test'
})
return (
<div>
<h1>{data}</h1>
</div>
)
}
const rendered = render(<Page />)
rendered.getByText('default')
await waitForElement(() => rendered.getByText('test'))
})
// See https://github.com/tannerlinsley/react-query/issues/137
it('should not override initial data in dependent queries', async () => {
function Page() {
const first = useQuery(false && 'first', () => 'data', {
initialData: 'init',
})
const second = useQuery(false && 'second', () => 'data', {
initialData: 'init',
})
return (
<div>
<h2>First Data: {first.data}</h2>
<h2>Second Data: {second.data}</h2>
<div>First Status: {first.status}</div>
<div>Second Status: {second.status}</div>
</div>
)
}
const rendered = render(<Page />)
rendered.getByText('First Data: init')
rendered.getByText('Second Data: init')
rendered.getByText('First Status: success')
rendered.getByText('Second Status: success')
})
// See https://github.com/tannerlinsley/react-query/issues/170
it('should start with status success if falsey query key is supplied', async () => {
function Page() {
const first = useQuery(false && 'first', () => 'data')
const second = useQuery('second', () => 'data')
return (
<div>
<div>First Status: {first.status}</div>
<div>Second Status: {second.status}</div>
</div>
)
}
const rendered = render(<Page />)
// use "act" to wait for state update and prevent console warning
rendered.getByText('First Status: success')
await waitForElement(() => rendered.getByText('Second Status: loading'))
await waitForElement(() => rendered.getByText('Second Status: success'))
})
// See https://github.com/tannerlinsley/react-query/issues/217
it('should start with status success if a null query key is supplied', async () => {
function Page() {
const first = useQuery(null && 'first', () => 'data')
const second = useQuery('second', () => 'data')
return (
<div>
<div>First Status: {first.status}</div>
<div>Second Status: {second.status}</div>
</div>
)
}
const rendered = render(<Page />)
rendered.getByText('First Status: success')
await waitForElement(() => rendered.getByText('Second Status: loading'))
await waitForElement(() => rendered.getByText('Second Status: success'))
})
// See https://github.com/tannerlinsley/react-query/issues/144
it('should be in "loading" state by default', async () => {
function Page() {
const { status } = useQuery('test', async () => {
await sleep(10)
return 'test'
})
return (
<div>
<h1 data-testid="status">{status}</h1>
</div>
)
}
const { getByTestId } = render(<Page />)
await waitForElement(() => getByTestId('status'))
act(() => {
expect(getByTestId('status').textContent).toBe('loading')
})
})
// See https://github.com/tannerlinsley/react-query/issues/144
it('should be in "success" state by default in manual mode', async () => {
function Page() {
const { status } = useQuery(
'test',
async () => {
await sleep(10)
return 'test'
},
{
manual: true,
}
)
return (
<div>
<h1>{status}</h1>
</div>
)
}
const rendered = render(<Page />)
rendered.getByText('success')
})
// See https://github.com/tannerlinsley/react-query/issues/147
it('should not pass stringified variables to query function', async () => {
const queryFn = jest.fn()
queryFn.mockImplementation(() => sleep(10))
const variables = { number: 5, boolean: false, object: {}, array: [] }
function Page() {
useQuery(['test', variables], queryFn)
return null
}
render(<Page />)
expect(queryFn).toHaveBeenCalledWith('test', variables)
})
// See https://github.com/tannerlinsley/react-query/issues/161
it('should not fetch query when `manual` is set to `true`', async () => {
const queryFn = jest.fn()
function Page() {
const { data = 'default' } = useQuery('test', queryFn, { manual: true })
return (
<div>
<h1>{data}</h1>
</div>
)
}
const rendered = render(<Page />)
await waitForElement(() => rendered.getByText('default'))
expect(queryFn).not.toHaveBeenCalled()
})
it('should not refetch query on focus when `manual` is set to `true`', async () => {
const queryFn = jest.fn()
function Page() {
const { data = 'default' } = useQuery('test', queryFn, { manual: true })
return (
<div>
<h1>{data}</h1>
</div>
)
}
const rendered = render(<Page />)
await waitForElement(() => rendered.getByText('default'))
act(() => {
window.dispatchEvent(new FocusEvent('focus'))
})
expect(queryFn).not.toHaveBeenCalled()
})
it('should set status to error if queryFn throws', async () => {
function Page() {
const { status, error } = useQuery(
'test',
() => {
return Promise.reject('Error test')
},
{ retry: false }
)
return (
<div>
<h1>{status}</h1>
<h2>{error}</h2>
</div>
)
}
const rendered = render(<Page />)
await waitForElement(() => rendered.getByText('error'))
await waitForElement(() => rendered.getByText('Error test'))
})
it('should retry specified number of times', async () => {
const queryFn = jest.fn()
queryFn.mockImplementation(() => {
return Promise.reject('Error test')
})
function Page() {
const { status, failureCount } = useQuery('test', queryFn, {
retry: 1,
retryDelay: 1,
})
return (
<div>
<h1>{status}</h1>
<h2>Failed {failureCount} times</h2>
</div>
)
}
const rendered = render(<Page />)
await waitForElement(() => rendered.getByText('loading'))
await waitForElement(() => rendered.getByText('error'))
// query should fail `retry + 1` times, since first time isn't a "retry"
await waitForElement(() => rendered.getByText('Failed 2 times'))
expect(queryFn).toHaveBeenCalledTimes(2)
})
it('should not retry if retry function `false`', async () => {
const queryFn = jest.fn()
queryFn.mockImplementationOnce(() => {
return Promise.reject('Error test')
})
queryFn.mockImplementation(() => {
return Promise.reject('NoRetry')
})
function Page() {
const { status, failureCount, error } = useQuery('test', queryFn, {
retryDelay: 1,
retry: (failureCount, error) => error !== 'NoRetry',
})
return (
<div>
<h1>{status}</h1>
<h2>Failed {failureCount} times</h2>
<h2>{error}</h2>
</div>
)
}
const rendered = render(<Page />)
await waitForElement(() => rendered.getByText('loading'))
await waitForElement(() => rendered.getByText('error'))
await waitForElement(() => rendered.getByText('Failed 2 times'))
await waitForElement(() => rendered.getByText('NoRetry'))
expect(queryFn).toHaveBeenCalledTimes(2)
})
it('should garbage collect queries without data immediately', async () => {
function Page() {
const [filter, setFilter] = React.useState('')
const { data } = useQuery(
['todos', { filter }],
async (key, { filter } = {}) => {
await sleep(10)
return `todo ${filter}`
}
)
return (
<div>
<div>{data}</div>
<button onClick={() => setFilter(filter + 'a')}>update</button>
</div>
)
}
const rendered = render(<Page />)
await waitForElement(() => rendered.getByText('update'))
fireEvent.click(rendered.getByText('update'))
fireEvent.click(rendered.getByText('update'))
fireEvent.click(rendered.getByText('update'))
fireEvent.click(rendered.getByText('update'))
expect(Object.keys(queryCache.queries).length).toEqual(5)
await waitForElement(() => rendered.getByText('todo aaaa'))
expect(Object.keys(queryCache.queries).length).toEqual(1)
})
// See https://github.com/tannerlinsley/react-query/issues/160
it('should continue retry after focus regain', async () => {
const originalVisibilityState = document.visibilityState
function mockVisibilityState(value) {
Object.defineProperty(document, 'visibilityState', {
value,
configurable: true,
})
}
// make page unfocused
mockVisibilityState('hidden')
function Page() {
const query = useQuery('test', () => Promise.reject('fetching error'), {
retry: 3,
retryDelay: 1,
})
return (
<div>
<div>status {query.status}</div>
<div>failureCount {query.failureCount}</div>
</div>
)
}
const rendered = render(<Page />)
await waitForElement(() => rendered.getByText('failureCount 1'))
await waitForElement(() => rendered.getByText('status loading'))
act(() => {
// reset visibilityState to original value
mockVisibilityState(originalVisibilityState)
window.dispatchEvent(new FocusEvent('focus'))
})
await waitForElement(() => rendered.getByText('failureCount 4'))
await waitForElement(() => rendered.getByText('status error'))
})
// See https://github.com/tannerlinsley/react-query/issues/195
it('should not refetch immediately after a prefetch', async () => {
const queryFn = jest.fn()
queryFn.mockImplementation(() => sleep(10))
const prefetchQueryFn = jest.fn()
prefetchQueryFn.mockImplementation(() => sleep(10))
function Page() {
const query = useQuery('test', queryFn)
return (
<div>
<div>status {query.status}</div>
</div>
)
}
await queryCache.prefetchQuery('test', prefetchQueryFn)
await queryCache.prefetchQuery('test', prefetchQueryFn)
const rendered = render(<Page />)
await waitForElement(() => rendered.getByText('status success'))
expect(prefetchQueryFn).toHaveBeenCalledTimes(1)
expect(queryFn).toHaveBeenCalledTimes(0)
})
// See https://github.com/tannerlinsley/react-query/issues/190
it('should reset failreCount on successful fetch', async () => {
function Page() {
let counter = 0
const query = useQuery(
'test',
async () => {
if (counter === 0) {
counter++
throw new Error('error')
} else {
return 'data'
}
},
{ retryDelay: 50 }
)
return (
<div>
<div>failureCount {query.failureCount}</div>
</div>
)
}
const rendered = render(<Page />)
await waitForElement(() => rendered.getByText('failureCount 1'))
await waitForElement(() => rendered.getByText('failureCount 0'))
})
// See https://github.com/tannerlinsley/react-query/issues/199
it('should use prefetched data for dependent query', async () => {
function Page() {
const [key, setKey] = React.useState(false)
const [isPrefetched, setPrefetched] = React.useState(false)
const query = useQuery(key, () => {})
React.useEffect(() => {
async function prefetch() {
await queryCache.prefetchQuery('key', () =>
Promise.resolve('prefetched data')
)
setPrefetched(true)
}
prefetch()
}, [])
return (
<div>
{isPrefetched && <div>isPrefetched</div>}
<button onClick={() => setKey('key')}>setKey</button>
<div>{query.data}</div>
</div>
)
}
const rendered = render(<Page />)
await waitForElement(() => rendered.getByText('isPrefetched'))
fireEvent.click(rendered.getByText('setKey'))
await waitForElement(() => rendered.getByText('prefetched data'))
})
it('should support a function that resolves a query key', async () => {
function Page() {
const { status, data, query } = useQuery(
() => 'key',
() => 'data'
)
return (
<div>
<div>Status: {status}</div>
<div>Data: {data}</div>
<div>Key: {query.queryKey}</div>
</div>
)
}
const rendered = render(<Page />)
rendered.getByText('Status: loading')
await waitForElement(() => rendered.getByText('Status: success'))
rendered.getByText('Data: data')
rendered.getByText('Key: key')
})
it('should support dependent query keys via returng falsy in a query key function', async () => {
function Page() {
const [shouldFetch, setShouldFetch] = React.useState(false)
const query = useQuery(
() => shouldFetch && 'key',
() => 'data'
)
return (
<div>
<div>Status: {query.status}</div>
<h2>Data: {query.data || 'no data'}</h2>
{query.isStale ? (
<button onClick={() => setShouldFetch(true)}>fetch</button>
) : null}
</div>
)
}
const rendered = render(<Page />)
rendered.getByText('Status: success')
rendered.getByText('Data: no data')
fireEvent.click(rendered.getByText('fetch'))
await waitForElement(() => rendered.getByText('Status: loading'))
await waitForElement(() => [
rendered.getByText('Status: success'),
rendered.getByText('Data: data'),
])
})
it('should support dependent query keys via throwing in a query key function', async () => {
function Page() {
const [shouldFetch, setShouldFetch] = React.useState()
const query = useQuery(
() => shouldFetch.on && 'key',
() => 'data'
)
return (
<div>
<div>Status: {query.status}</div>
<h2>Data: {query.data || 'no data'}</h2>
{query.isStale ? (
<button onClick={() => setShouldFetch({ on: true })}>fetch</button>
) : null}
</div>
)
}
const rendered = render(<Page />)
rendered.getByText('Status: success')
rendered.getByText('Data: no data')
fireEvent.click(rendered.getByText('fetch'))
await waitForElement(() => rendered.getByText('Status: loading'))
await waitForElement(() => [
rendered.getByText('Status: success'),
rendered.getByText('Data: data'),
])
})
it('should not mark query as fetching, when using initialData', async () => {
function Page() {
const query = useQuery('key', () => {}, { initialData: 'data' })
return (
<div>
<div>{query.data}</div>
<div data-testid="isFetching">{`${query.isFetching}`}</div>
</div>
)
}
const rendered = render(<Page />)
rendered.getByText('data')
expect(rendered.getByTestId('isFetching').textContent).toBe('false')
})
it('should initialize state properly, when initialData is falsy', async () => {
function Page() {
const query = useQuery('key', () => {}, { initialData: 0 })
return (
<div>
<div>{query.data}</div>
<div data-testid="isFetching">{`${query.isFetching}`}</div>
<div data-testid="status">{query.status}</div>
</div>
)
}
const rendered = render(<Page />)
rendered.getByText('0')
expect(rendered.getByTestId('isFetching').textContent).toBe('false')
expect(rendered.getByTestId('status').textContent).toBe('success')
})
// See https://github.com/tannerlinsley/react-query/issues/214
it('should not cause infinite loop after query key is changed to falsy', async () => {
const callback = jest.fn()
function Page() {
const [shouldFetch, setShouldFetch] = React.useState(true)
const query = useQuery(shouldFetch && 'key', () => 'fetched data', {
initialData: shouldFetch ? 'initial' : 'initial falsy',
})
const { data } = query
React.useEffect(() => {
callback()
}, [query])
return (
<div>
<div>{data}</div>
<button onClick={() => setShouldFetch(false)}>
setShouldFetch(false)
</button>
</div>
)
}
const rendered = render(<Page />)
await waitForElement(() => rendered.getByText('initial'))
fireEvent.click(rendered.getByText('setShouldFetch(false)'))
rendered.getByText('initial falsy')
// wait for infinite loop to call mock function a bit
await act(() => sleep(200))
expect(callback.mock.calls.length).toBeLessThan(5)
})
it('it should support falsy queryKey in query object syntax', async () => {
const queryFn = jest.fn()
queryFn.mockImplementation(() => 'data')
function Page() {
useQuery({
queryKey: false && 'key',
queryFn,
})
return null
}
render(<Page />)
const cachedQueries = Object.keys(queryCache.queries).length
expect(queryFn).not.toHaveBeenCalled()
expect(cachedQueries).toEqual(0)
})
it('it should throw when using query syntax and missing required keys', async () => {
// mock console.error to avoid the wall of red text,
// you could also do this on beforeEach/afterEach
jest.spyOn(console, 'error')
console.error.mockImplementation(() => {})
function Page() {
useQuery({})
return null
}
expect(() => render(<Page />)).toThrowError(/queryKey|queryFn/)
console.error.mockRestore()
})
test('should schedule stale timeout by default', async () => {
function Page() {
const query = useQuery('test', () => 'fetched data')
return (
<div>
<div>{query.data}</div>
<div data-testid="isStale">{`${query.isStale}`}</div>
<div data-testid="staleTimeout">{`${query.query.staleTimeout}`}</div>
</div>
)
}
const rendered = render(<Page />)
await waitForElement(() => rendered.getByText('fetched data'))
expect(rendered.getByTestId('isStale').textContent).toBe('true')
expect(rendered.getByTestId('staleTimeout').textContent).not.toBe(
'undefined'
)
})
test('should not schedule stale timeout, if staleTime is set to `Infinity`', async () => {
function Page() {
const query = useQuery('test', () => 'fetched data', {
staleTime: Infinity,
})
return (
<div>
<div>{query.data}</div>
<div data-testid="isStale">{`${query.isStale}`}</div>
<div data-testid="staleTimeout">{`${query.query.staleTimeout}`}</div>
</div>
)
}
const rendered = render(<Page />)
await waitForElement(() => rendered.getByText('fetched data'))
expect(rendered.getByTestId('isStale').textContent).toBe('false')
expect(rendered.getByTestId('staleTimeout').textContent).toBe('undefined')
})
})