Question

我的问题是我们如何开玩笑地掩盖这些行？

export const mapDispatchToProps = dispatch => {
    return {
        submitClaimsForm: form => {
            dispatch(submitClaimsForm(form));
        }
    };
};

在我的组件中，这是redux连接区域的外观：

export function mapStateToProps(state) {
    return {
        formNonMember: state.form,
        submissionSuccess: state.claimSubmission.submissionSuccess
    };
}

export const mapDispatchToProps = dispatch => {
    return {
        submitClaimsForm: form => {
            dispatch(submitClaimsForm(form));
        }
    };
};

let AdditionalDetailsFormConnect = reduxForm({
    form: 'AdditionalDetails',
    destroyOnUnmount: false
})(AdditionalDetailsForm);

export default connect(
    mapStateToProps,
    mapDispatchToProps
)(AdditionalDetailsFormConnect);

这是分派动作的使用方式：

onSubmit() {
    this.props.submitClaimsForm(this.props.formattedForm);
}

接下来，这是实际动作：

import {postClaimsForm} from '../shared/services/api';

export const Actions = {
    SET_SUBMISSION_STATUS: 'SET_SUBMISSION_STATUS'
};

export const submitClaimsForm = form => dispatch => {
    return postClaimsForm(form)
        .then(res => {
            // console.log('promise returned:', res);
            return dispatch({
                type: Actions.SET_SUBMISSION_STATUS,
                submissionSuccess: true
            });
        })
        .catch(error => {
            // console.log('error returned:', error);
            return dispatch({
                type: Actions.SET_SUBMISSION_STATUS,
                submissionSuccess: false
            });
        });
};

到目前为止，我已经尝试过：

it('mapDispatchToProps works as expected', () => {
    const actionProps = mapDispatchToProps({
        submitClaimsForm: jest.fn()
    });
    actionProps.submitClaimsForm();
    expect(submitClaimsForm).toHaveBeenCalled();
});

但是这个错误告诉我dispatch未定义。

我也有此测试通过，它告诉我submitClaimsForm已被调用，但它仅涵盖onSubmit的行：

it('onSubmit is called on submit', function() {
    const spyOnSubmit = jest.spyOn(wrapper.instance(), 'onSubmit');
    const mockHandleSubmit = jest.fn(wrapper.instance().onSubmit);
    const submitClaimsForm = jest.fn(wrapper.instance().submitClaimsForm);

    wrapper.setProps({
        handleSubmit: mockHandleSubmit,
        submitClaimsForm
    });

    wrapper.find('MyForm').simulate('submit');

    expect(mockHandleSubmit).toHaveBeenCalled();
    expect(spyOnSubmit).toHaveBeenCalled();
    expect(submitClaimsForm).toHaveBeenCalled();  // <--
});

Answer 1

您的mapDispatchToProps works as expected测试失败的原因是，mapDispatchToProps希望传递dispatch函数，而不是映射本身（这就是mapDispatchToProps returns < / em>）。

这应该有效：

jest.mock('./actions'); import * as actions from './actions'; it('mapDispatchToProps calls the appropriate action', async () => { // mock the 'dispatch' object const dispatch = jest.fn(); const actionProps = mapDispatchToProps(dispatch); const formData = { ... }; actionProps.submitClaimsForm(formData); // verify the appropriate action was called expect(actions.submitClaimsForm).toHaveBeenCalled(formData); });

如何用Jest覆盖mapDispatchToProps中的行？

1 个答案: