Added appUpdates reducer test

test/app/reducers/appUpdates.test.ts

@@ -0,0 +1,30 @@
+import reducer, {
+  APP_UPDATE_AVAILABLE,
+  RESET_APP_UPDATE,
+  appUpdateAvailable,
+  resetAppUpdate,
+} from '../../../src/app/reducers/appUpdates';
+
+describe('appUpdatesReducer', () => {
+  describe('reducer', () => {
+    it('returns true on APP_UPDATE_AVAILABLE', () => {
+      expect(reducer(undefined, { type: APP_UPDATE_AVAILABLE })).toEqual(true);
+    });
+
+    it('returns false on RESET_APP_UPDATE', () => {
+      expect(reducer(undefined, { type: RESET_APP_UPDATE })).toEqual(false);
+    });
+  });
+
+  describe('appUpdateAvailable', () => {
+    test('creates expected action', () => {
+      expect(appUpdateAvailable()).toEqual({ type: APP_UPDATE_AVAILABLE });
+    });
+  });
+
+  describe('resetAppUpdate', () => {
+    test('creates expected action', () => {
+      expect(resetAppUpdate()).toEqual({ type: RESET_APP_UPDATE });
+    });
+  });
+});