chore: rm duplicated tests (#914)

* chore: remove original duplicated tests

* chore: remove original duplicated tests

* update test

Author: huozhi

test/use-swr-int.test.tsx test/use-swr-integration.test.tsx

@@ -294,4 +294,61 @@ describe('useSWR - refresh', () => {
     expect(fetcherWithToken).toBeCalledTimes(5)
     expect(fetcherWithToken).toHaveBeenLastCalledWith('1')
   })
+
+  it('the previous interval timer should not call onSuccess callback if key changes too fast', async () => {
+    const fetcherWithToken = jest.fn(async token => {
+      await sleep(200)
+      return token
+    })
+    const onSuccess = jest.fn((data, key) => {
+      return `${data} ${key}`
+    })
+    function Page() {
+      const [count, setCount] = useState(0)
+      const { data } = useSWR(`${count.toString()}-hash`, fetcherWithToken, {
+        refreshInterval: 100,
+        dedupingInterval: 50,
+        onSuccess
+      })
+      return (
+        <button
+          onClick={() => setCount(count + 1)}
+        >{`click me ${data}`}</button>
+      )
+    }
+    const { container } = render(<Page />)
+
+    // initial revalidate
+    await act(() => sleep(200))
+    expect(fetcherWithToken).toBeCalledTimes(1)
+    expect(onSuccess).toBeCalledTimes(1)
+    expect(onSuccess).toHaveLastReturnedWith(`0-hash 0-hash`)
+    // first refresh
+    await act(() => sleep(100))
+    expect(fetcherWithToken).toBeCalledTimes(2)
+    expect(fetcherWithToken).toHaveBeenLastCalledWith('0-hash')
+    await act(() => sleep(200))
+    expect(onSuccess).toBeCalledTimes(2)
+    expect(onSuccess).toHaveLastReturnedWith(`0-hash 0-hash`)
+
+    // second refresh start
+    await act(() => sleep(100))
+    expect(fetcherWithToken).toBeCalledTimes(3)
+    expect(fetcherWithToken).toHaveBeenLastCalledWith('0-hash')
+    // change the key during revalidation
+    // The second refresh will not start a new timer
+    fireEvent.click(container.firstElementChild)
+
+    // first refresh with new key 1
+    await act(() => sleep(100))
+    expect(fetcherWithToken).toBeCalledTimes(4)
+    expect(fetcherWithToken).toHaveBeenLastCalledWith('1-hash')
+    await act(() => sleep(210))
+    expect(onSuccess).toBeCalledTimes(3)
+    expect(onSuccess).toHaveLastReturnedWith(`1-hash 1-hash`)
+
+    // second refresh with new key 1
+    expect(fetcherWithToken).toBeCalledTimes(5)
+    expect(fetcherWithToken).toHaveBeenLastCalledWith('1-hash')
+  })
 })