-

const input = TestUtils.renderIntoDocument(<input onChange={sinon.spy()} />);
        const p = new Promise(function(resolve, reject) {
            TestUtils.Simulate.change(React.findDOMNode(input));
            resolve(true);
        });
        p.then(function(result) {
            expect(result).to.be.true;
            expect(input.props.onChange).has.been.calledOnce;
        }).then(done, done);