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import { StrictMode, Suspense, version as reactVersion, useState } from 'react'import { fireEvent, render, waitFor } from '@testing-library/react'import { atom, useAtomValue, useSetAtom } from 'jotai'import { abortableAtom } from 'jotai/utils'import { getTestProvider, itSkipIfVersionedWrite } from '../testUtils'
const Provider = getTestProvider()
// Doesn't work with 16.8.6 maybe because of some React bugs?// Curious, though. Feel free to dig into it if someone gets interested.const describeExceptFor1686 =  reactVersion !== '16.8.6' ? describe : describe.skip
describeExceptFor1686('abortable atom test', () => {  itSkipIfVersionedWrite('can abort with signal.aborted', async () => {    const countAtom = atom(0)    let abortedCount = 0    const derivedAtom = abortableAtom(async (get, { signal }) => {      const count = get(countAtom)      await new Promise((r) => setTimeout(r, 100))      if (signal.aborted) {        ++abortedCount      }      return count    })
    const Component = () => {      const count = useAtomValue(derivedAtom)      return <div>count: {count}</div>    }
    const Controls = () => {      const setCount = useSetAtom(countAtom)      return (        <>          <button onClick={() => setCount((c) => c + 1)}>button</button>        </>      )    }
    const { findByText, getByText } = render(      <StrictMode>        <Provider>          <Suspense fallback="loading">            <Component />            <Controls />          </Suspense>        </Provider>      </StrictMode>    )
    await findByText('loading')    await findByText('count: 0')    expect(abortedCount).toBe(0)
    fireEvent.click(getByText('button'))    fireEvent.click(getByText('button'))    await findByText('count: 2')    expect(abortedCount).toBe(1)
    fireEvent.click(getByText('button'))    await findByText('count: 3')    expect(abortedCount).toBe(1)  })
  itSkipIfVersionedWrite('can abort with event listener', async () => {    const countAtom = atom(0)    let abortedCount = 0    const derivedAtom = abortableAtom(async (get, { signal }) => {      const count = get(countAtom)      const callback = () => {        ++abortedCount      }      signal.addEventListener('abort', callback)      await new Promise((r) => setTimeout(r, 100))      signal.removeEventListener('abort', callback)      return count    })
    const Component = () => {      const count = useAtomValue(derivedAtom)      return <div>count: {count}</div>    }
    const Controls = () => {      const setCount = useSetAtom(countAtom)      return (        <>          <button onClick={() => setCount((c) => c + 1)}>button</button>        </>      )    }
    const { findByText, getByText } = render(      <StrictMode>        <Provider>          <Suspense fallback="loading">            <Component />            <Controls />          </Suspense>        </Provider>      </StrictMode>    )
    await findByText('loading')    await findByText('count: 0')    expect(abortedCount).toBe(0)
    fireEvent.click(getByText('button'))    fireEvent.click(getByText('button'))    await findByText('count: 2')    expect(abortedCount).toBe(1)
    fireEvent.click(getByText('button'))    await findByText('count: 3')    expect(abortedCount).toBe(1)  })
  itSkipIfVersionedWrite('can abort on unmount', async () => {    const countAtom = atom(0)    let abortedCount = 0    const derivedAtom = abortableAtom(async (get, { signal }) => {      const count = get(countAtom)      await new Promise((r) => setTimeout(r, 100))      if (signal.aborted) {        ++abortedCount      }      return count    })
    const Component = () => {      const count = useAtomValue(derivedAtom)      return <div>count: {count}</div>    }
    const Parent = () => {      const setCount = useSetAtom(countAtom)      const [show, setShow] = useState(true)      return (        <>          {show ? <Component /> : 'hidden'}          <button onClick={() => setCount((c) => c + 1)}>button</button>          <button onClick={() => setShow((x) => !x)}>toggle</button>        </>      )    }
    const { findByText, getByText } = render(      <StrictMode>        <Provider>          <Suspense fallback="loading">            <Parent />          </Suspense>        </Provider>      </StrictMode>    )
    await findByText('loading')    await findByText('count: 0')    expect(abortedCount).toBe(0)
    fireEvent.click(getByText('button'))    fireEvent.click(getByText('toggle'))    await findByText('hidden')    await waitFor(() => {      expect(abortedCount).toBe(1)    })  })
  it('throws aborted error (like fetch)', async () => {    const countAtom = atom(0)    const derivedAtom = abortableAtom(async (get, { signal }) => {      const count = get(countAtom)      await new Promise((r) => setTimeout(r, 100))      if (signal.aborted) {        throw new Error('aborted')      }      return count    })
    const Component = () => {      const count = useAtomValue(derivedAtom)      return <div>count: {count}</div>    }
    const Controls = () => {      const setCount = useSetAtom(countAtom)      return (        <>          <button onClick={() => setCount((c) => c + 1)}>button</button>        </>      )    }
    const { findByText, getByText } = render(      <StrictMode>        <Provider>          <Suspense fallback="loading">            <Component />            <Controls />          </Suspense>        </Provider>      </StrictMode>    )
    await findByText('loading')    await findByText('count: 0')
    fireEvent.click(getByText('button'))    fireEvent.click(getByText('button'))    await findByText('count: 2')
    fireEvent.click(getByText('button'))    await findByText('count: 3')  })})