react单测

// tests/index.test.js
import React from "react";

describe("test", () => {
  test("equal", () => {
    expect(<div />).toEqual(<div />);
  });
});
 
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import React from "react";

describe("test", () => {

  test("test1", () => {
    expect(1).toBe(1)
  });

  describe("group", () => {
    test("test1", () => {
      expect(1).toBe(1)
    });

    test("test2", () => {
      expect(2).toBe(2)
    });
  });
});

 
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test("test1", () => {
  expect(1).toBe(1)
});
 
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it("test1", () => {
  expect(1).toBe(1)
});
 
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expect(1).toBe(1)
 
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expect({name: "hdy"}).toEqual({name: "hdy"})
 
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test("test1", () => {
  expect(1 > 3).toBeFalsy();
});

test("test1", () => {
  expect(1 === 1).toBeTruthy();
});
 
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import React from 'react'
import '@testing-library/jest-dom'
import { render, screen } from '@testing-library/react'

test('has correct welcome text', () => {
  render(<div>hello world!</div>)
  expect(screen.getByText(/hello/i)).toHaveTextContent('hello world')
})
 
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import React from 'react'
import '@testing-library/jest-dom'
import { render, screen } from '@testing-library/react'

test('has correct welcome text', () => {
  render(
    <div>
      hello
      <div><div>hello world!</div></div>
    </div>
  )
  expect(screen.getByText(/hello world!/)).toBeInTheDocument()
})
 
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