fix(chips): id shuold be required prop

packages/chips/ChipSet.tsx

@@ -160,7 +160,11 @@ export default class ChipSet extends React.Component<ChipSetProps, ChipSetState>
   };
 
   renderChip = (chip: any) => {
-    const {filter} = this.props;
+    const {choice, filter, input} = this.props;
+    if ((choice || filter || input) && !chip.props.id) {
+      throw new Error('Chip variant missing required property: id.');
+    }
+
     const {selectedChipIds} = this.state;
     const selected = selectedChipIds.indexOf(chip.props.id) > -1;
     const {handleInteraction, handleSelect, handleRemove, ...chipProps} = chip.props;

test/unit/chips/ChipSet.test.tsx

@@ -414,6 +414,31 @@ test('chip is rendered with computeBoundingRect method prop if is not filter var
   assert.equal(chip.props.computeBoundingRect, null);
 });
 
+test('basic variant ChipSet will not throw error if chip missing id', () => {
+  const stub = (<Chip/>);
+  const wrapper = shallow<ChipSet>(<ChipSet/>);
+  assert.doesNotThrow(() => wrapper.instance().renderChip(stub));
+});
+
+
+test('filter variant ChipSet will throw error if chip missing id', () => {
+  const stub = (<Chip/>);
+  const wrapper = shallow<ChipSet>(<ChipSet filter />);
+  assert.throws(() => wrapper.instance().renderChip(stub));
+});
+
+test('choice variant ChipSet will throw error if chip missing id', () => {
+  const stub = (<Chip/>);
+  const wrapper = shallow<ChipSet>(<ChipSet choice />);
+  assert.throws(() => wrapper.instance().renderChip(stub));
+});
+
+test('input variant of ChipSet will throw error if chip missing id', () => {
+  const stub = (<Chip/>);
+  const wrapper = shallow<ChipSet>(<ChipSet input />);
+  assert.throws(() => wrapper.instance().renderChip(stub));
+});
+
 test('#componentWillUnmount destroys foundation', () => {
   const wrapper = shallow<ChipSet>(<ChipSet><Chip id='1' /></ChipSet>);
   const foundation = wrapper.state().foundation;