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Showing content from https://enzymejs.github.io/enzyme/docs/api/ShallowWrapper/shallow.html below:

shallow([options]) · Enzyme

Shallow renders the root node and returns a shallow wrapper around it. It must be a single-node wrapper.

1. options (Object [optional]):
   • options.context: (Object [optional]): Context to be passed into the component
   • options.disableLifecycleMethods: (Boolean [optional]): If set to true, componentDidMount is not called on the component, and componentDidUpdate is not called after setProps and setContext. Default to false.

ShallowWrapper: A new wrapper that wraps the node after it's been shallow rendered.

function Bar() {
  return (
    <div>
      <div className="in-bar" />
    </div>
  );
}

function Foo() {
  return (
    <div>
      <Bar />
    </div>
  );
}

const wrapper = shallow(<Foo />);
expect(wrapper.find('.in-bar')).to.have.lengthOf(0);
expect(wrapper.find(Bar)).to.have.lengthOf(1);
expect(wrapper.find(Bar).shallow().find('.in-bar')).to.have.lengthOf(1);

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