我正在使用Gatsby和Jest进行测试 . 默认情况下,Gatsby处理GraphQL数据获取,并且从我发现它没有提供任何解决方案来测试单元测试中的GraphQL查询 .

有没有办法做到这一点?现在我只是模拟测试组件本身的查询,但我希望能够在GraphiQL中手动测试查询工作 .

这是我的代码的样子:

PageContent.jsx

import PropTypes from 'prop-types';
import React from 'react';

const PageContent = ({ data: { markdownRemark: { html } } }) => (
  <div>
    {html}
  </div>
);

PageContent.propTypes = {
  data: PropTypes.shape({
    markdownRemark: PropTypes.shape({
      html: PropTypes.string.isRequired,
    }).isRequired,
  }).isRequired,
};

export const query = graphql`
  query PageContent($id: ID!) {
    markdownRemark(frontmatter: { id: $id }) {
      html
    }
  }
`;

export default PageContent;

PageContent.test.jsx

import PageContent from 'templates/PageContent';

describe("<PageContent>", () => {
  let mountedComponent;
  let props;

  const getComponent = () => {
    if (!mountedComponent) {
      mountedComponent = shallow(<PageContent {...props} />);
    }
    return mountedComponent;
  };

  beforeEach(() => {
    mountedComponent = undefined;
    props = {
      data: {
        markdownRemark: {
          html: '<div>test</div>',
        },
      },
    };
  });

  it("renders a <div> as the root element", () => {
    expect(getComponent().is('div')).toBeTruthy();
  });

  it("renders `props.data.markdownRemark.html`", () => {
    expect(getComponent().contains(props.data.markdownRemark.html)).toBeTruthy();
  });
});