MyCustomComponent.js

export function MyCustomComponent(props) {
  return (
    <div>
      <p>MyCustomComponent paragraph 1</p>
      <p>MyCustomComponent paragraph 2</p>
    </div>
  )
}

ParentComponent.js

export function ParentComponent(props) {
  return (
    <div>
      <p>Just a paragraph</p>
      <MyCustomComponent/>
    </div>
  );
}

ParentComponent.unit.test.js.snap

// Jest Snapshot v1, https://goo.gl/fbAQLP

exports[`renders ParentComponent`] = `
  <div>
    <p>Just a paragraph</p>
    <MyCustomComponent/>
  </div>
`;