Add legend support to charts

Author: ekscentrysytet

src/index.js

@@ -196,6 +196,7 @@ class ChartComponent extends React.Component {
     const {options, legend, type, redraw, plugins} = this.props;
     const node = ReactDOM.findDOMNode(this);
     const data = this.memoizeDataProps();
+    options.legend = legend;
 
     this.chart_instance = new Chart(node, {
       type,

test/__tests__/Chart_spec.js

@@ -122,14 +122,15 @@ describe('<Chart />', () => {
   it('renders on props.options change', () => {
     const spy = sinon.spy(Chart.prototype, 'render');
     const wrapper = mountComponent({ options: {} });
+    const defaultLegendOpts = wrapper.prop('legend');  
 
     expect(spy.callCount).to.equal(1);
 
-    wrapper.setProps({ options: {} });
+    wrapper.setProps({ options: { legend: defaultLegendOpts } });
 
     expect(spy.callCount).to.equal(1);
 
-    wrapper.setProps({ options: { a: 1 } });
+    wrapper.setProps({ options: { legend: defaultLegendOpts, a: 1 } });
 
     expect(spy.callCount).to.equal(2);