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May 19th, 2019
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  1. test('直接預設 store ,保管的 state 從 -3 開始', () => {
  2. const store = createStore(reducer, {
  3. count: -3,
  4. });
  5.  
  6. // 使用 renderWithRedux 回傳 render 後的結果
  7. const { getByText, getByTestId } = renderWithRedux(<Counter />, { store, });
  8.  
  9. // +2
  10. fireEvent.click(getByText('點我加 2'));
  11. expect(getByTestId('display_count').textContent).toBe('點了-1下');
  12. });
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