spinner render unit test

squarenotsquare/__tests__/App-test.js

@@ -14,6 +14,7 @@ import NineKey from '../src/components/NineKey';
 import AdditionGame from '../src/screens/AdditionGame';
 import Score from '../src/screens/Score';
 import ScrollingPicker from '../src/components/ScrollingPicker';
+import Spinner from '../src/components/Spinner';
 
 it('renders square stack', () => {
   const mockStore = ConfigStore;
@@ -72,4 +73,8 @@ it('renders ninekey component', () => {
 
 it('renders scrolling picker component', () => {
   renderer.create(<ScrollingPicker mode='square' modeSetter={() => {return true}}/>)
+})
+
+it('renders spinner component', () => {
+  renderer.create(<Spinner/>)
 })