reactjs - 在 react-testing-library 中使用“screen”找不到任何东西

Question

每当我尝试找到元素时，expect(screen.getByRole("heading", { level: 2 })).toBeInTheDocument(); 我都会收到消息：

TestingLibraryElementError: Unable to find an accessible element with the role "heading"

但是，如果我这样做

const { getByRole } = render(<NewCommentForm />);
expect(getByRole("heading", { level: 2 })).toBeInTheDocument();

有用。

这是我的 package.json 文件：

{
  "name": "client",
  "version": "0.1.0",
  "private": true,
  "proxy": "http://localhost:3001/",
  "dependencies": {
    "@testing-library/jest-dom": "^5.11.5",
    "@testing-library/user-event": "^7.1.2",
    "axios": "^0.21.1",
    "jest-axe": "^4.0.0",
    "moment": "^2.29.0",
    "prettier": "^2.2.1",
    "react": "^16.13.1",
    "react-dom": "^16.13.1",
    "react-scripts": "3.4.1"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject"
  },
  "eslintConfig": {
    "extends": "react-app"
  },
  "browserslist": {
    "production": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ],
    "development": [
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version"
    ]
  },
  "devDependencies": {
    "@testing-library/dom": "^7.28.1",
    "@testing-library/react": "^11.2.5"
  }
}

和setupTests.js

import "@testing-library/jest-dom/extend-expect";

你能告诉我为什么screen在调用方法时不能正常工作getByRole吗？似乎screen.getByText工作正常。

标签： reactjsunit-testingreact-testing-library