expect(received).toInclude(expected)

Expected string to include:
  "render() {"
Received:
  "./index.js:5:5
Parsing ecmascript source code failed
  3 | class ClassDefault extends React.Component {
  4 |   render()
> 5 |     return <h1>Default Export</h1>;
    |     ^^^^^^
  6 |   }
  7 | }
  8 |·
Expected '{', got 'return'"

  302 |     await session.assertHasRedbox()
  303 |
> 304 |     await expect(session.getRedboxSource()).resolves.toInclude('render() {')
      |                                                      ^
  305 |
  306 |     expect(await session.getRedboxSource()).toInclude(
  307 |       "throw new Error('nooo');"

  at Object.toInclude (../node_modules/.pnpm/expect@29.7.0/node_modules/expect/build/index.js:174:22)
  at Object.toInclude (development/acceptance/error-recovery.test.ts:304:54)