如何在玩笑和测试/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 antd 工具提示，我想为此编写一个测试：

<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();
  });

但此测试失败，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（再试一次）”？

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

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

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

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

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

4. 使用同步方法进行工具提示搜索而不是异步

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

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

总而言之，修复了所有错误后，测试应如下所示：

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奏效，因此我尝试使用 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();
});