如何在笑话和测试/库中测试工具提示标题

Question

我想测试工具提示标题是否等于特定文本。这是我的工具提示，我想为其编写测试：

<Tooltip
  title={
     this.props.connection ? "Connected" : "Disconnected (Try again)"
         }>
  <Badge status="default" data-testid="connection-sign" />
</Tooltip>

这是我开玩笑的测试：

 test("Show error title in tooltip", async () => {
    baseDom = render(cardComponent);
    fireEvent.mouseMove(await baseDom.findByTestId("connection-sign")); //To hover element and show tooltip
    expect(
      baseDom.getByTitle(
        "Disconnected (Try again)"
      )
    ).toBeInTheDocument();
  });

但是这个测试失败了，无法找到具有此标题的元素。如何测试我的工具提示是否包含“已断开连接（重试）”？

Answer 1

您的测试中有多个错误。

1. 将组件类型而不是组件实例传递给

   render

// this is wrong, passing component type
baseDom = render(cardComponent);

// this is right, passing component instance created with JSX
baseDom = render(<cardComponent />);

2. 使用

   mouseMove

   代替

   mouseOver

   事件

3. 按标题搜索元素并传递文本，而不是按文本搜索

// wrong, because, the prop on the Tooltip is called 'title'
// but it is actually text as 'getByTitle' looks for HTML
// title attribute
baseDom.getByTitle("Disconnected (Try again)");

// right, because you are actually looking for text not
// HTML title attribute (but wrong see (4))
baseDom.getByText("Disconnected (Try again)");

4. 使用同步方法进行工具提示搜索而不是异步

// wrong, because, Tooltip is added dynamically to the DOM
baseDom.getByText("Disconnected (Try again)");

// right
await baseDom.findByText("Disconnected (Try again)");

总而言之，修正所有错误后，测试应该如下所示：

import React from "react";
import { render, fireEvent } from "@testing-library/react";
import App from "./App";

test("Show error title in tooltip", async () => {
  const baseDom = render(<cardComponent />);

  fireEvent.mouseOver(baseDom.getByTestId("connection-sign"));

  expect(
    await baseDom.findByText("Disconnected (Try again)")
  ).toBeInTheDocument();
});

Answer 2

我尝试了很多方法但没有成功，所以我尝试了 鼠标输入而不是mouseOver或mouseMove，它对我有用。 这是测试工具提示内容的解决方案，如下所示：

import { render, cleanup, waitFor, fireEvent, screen } from '@testing-library/react';

// Timeline component should render correctly with tool-tip
test('renders TimeLine component with mouse over(tool-tip)', async () => {

  const { getByTestId, getByText, getByRole } = render(
        <TimeLine
          items={timeLineItems()}
          currentItem={currentTimeLineItem()}
          onTimeLineItemChange={() => {}}
        />
    );

  const courseTitle = "Course collection-3";

  fireEvent.mouseEnter(getByRole('button'));

  await waitFor(() => getByText(courseTitle));
  expect(screen.getByText(courseTitle)).toBeInTheDocument();
});

Answer 3

除了接受的答案之外，重要的是要确保您是否为

getPopupContainer

工具提示设置了

Antd

属性，弹出窗口可能对反应测试库不可见，就像我的情况一样，因为 DOM 容器集可能会测试组件时，尤其是单元测试时，在主体中不可用。例如

就我而言，我有

<Popover
   getPopupContainer={() => document.getElementById('post--component-drawer')}
   content={<h1>Hello world</h1>}>
      <span data-testid="symbol-input--color-input">Click me</span>
</Popover>

div

post--component-drawer

不适用于该单元测试。所以我必须模拟

Popover

以确保我将 prop

getPopupContainer

覆盖为 null，以便弹出窗口可见

所以在我的测试文件的开头，我嘲笑了

Popover

jest.mock('antd', () => {
  const antd = jest.requireActual('antd');

  /** We need to mock Popover in order to override getPopupContainer to null. getPopContainer
   * sets the DOM container and if this prop is set, the popup div may not be available in the body
   */
  const Popover = (props) => {
    return <antd.Popover {...props} getPopupContainer={null} />;
  };

  return {
    __esModule: true,
    ...antd,
    Popover,
  };
});


test('popver works', async () => {
  render(<MyComponent/>);
  fireEvent.mouseOver(screen.getByTestId('symbol-input--color-input'));

  await waitFor(() => {
    expect(screen.getByRole('heading', {level: 1})).toBeInTheDocument();
  });
});

Answer 4

我发现这是最新的方式。您必须在测试中执行 async()，然后等待 findByRole，因为它不是即时的！

    render(<LogoBar />);
    fireEvent.mouseEnter(screen.getByLabelText('DaLabel'));
    await screen.findByRole(/tooltip/);
    expect(screen.getByRole(/tooltip/)).toBeInTheDocument();

Answer 5

我在类似的代码和 React 测试库中苦苦挣扎，使用外部组件，对我来说，诀窍是使用

fireEvent.focus(...component...)

相反。 希望它可以帮助一些人！

Answer 6

这是对 Akshay Pal 解决方案的轻微修改：

import { render, cleanup, waitFor, fireEvent, screen } from '@testing-library/react';

// Timeline component should render correctly with tool-tip
test('renders TimeLine component with mouse over(tool-tip)', async () => {

  render(
        <TimeLine
          items={timeLineItems()}
          currentItem={currentTimeLineItem()}
          onTimeLineItemChange={() => {}}
        />
    );

  const courseTitle = "Course collection-3";

  fireEvent.mouseEnter(screen.getByRole('button'));

  expect(await screen.getByText(courseTitle)).toBeTruthy();
});