javascript - 在类方法中测试静态方法调用时出现TypeError

Question

我在 React 组件中有一个静态方法，例如:

class DeliveryAddressScreen extends Component {
  static isAddressReady(address) {
    return !!(address)
  }

  sendAddress(address) {
    if(this.isAddressReady(address)) {
     // DO SOMETHING
    }

  }
}

还有我的测试:

  it('sample tests', () => {
    const component = shallow(<DeliveryAddressScreen />)
    component.instance().sendAddress('Address')
    expect(true).toBe(true) // Just a sample
  })

反馈是:

TypeError: this.isAddressReady is not a function

有没有正确的方法来模拟这个方法或类似的东西？

Answer 1

应使用类名调用静态方法。

class DeliveryAddressScreen extends React.Component {
  static isAddressReady(address) {
    return !!(address)
  }

  sendAddress(address) {
    if(DeliveryAddressScreen.isAddressReady(address)) {
        console.log(address)
    }
  }
}

const subject = new DeliveryAddressScreen()
subject.sendAddress("test")

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>