test.js

 it('can pass advanced context to the child of mounted component', () => {
      const SimpleComponent = React.createClass({
        contextTypes: {
          ctx1: React.PropTypes.string.isRequired,
          ctx2: React.PropTypes.string.isRequired,
        },
        render() {
          return <div>{this.context.ctx1}{this.context.ctx2}</div>;
        },
      });
      const ComplexComponent = React.createClass({
        contextTypes: {
          ctx1: React.PropTypes.string.isRequired,
        },
        render() {
          return <div><SimpleComponent /><p>{this.context.ctx1}</p></div>;
        },
      });

      const advancedContext = { ctx1: 'ctx1', ctx2: 'ctx2' };
      const wrapper = mount(<ComplexComponent />, { context: advancedContext });
      expect(wrapper.find(SimpleComponent)).to.have.length(1);
    });