Added expects for non-error cases

final/client/src/components/__tests__/button.tsx

@@ -1,3 +1,4 @@
+import React from 'react';
 import { render } from '../../enzyme';
 
 import { cleanup } from '../../test-utils';
@@ -8,6 +9,7 @@ describe('Button', () => {
   afterEach(cleanup);
 
   it('should render without error', () => {
-    render(<Button>Hello World</Button>);
+    var wrapper = render(<Button>Hello World</Button>);
+    expect(wrapper.html()).toContain('Hello World');
   });
 });

final/client/src/containers/__tests__/action-button.tsx

@@ -11,7 +11,8 @@ describe('action button', () => {
   afterEach(cleanup);
 
   it('should render without error', () => {
-    render(<ActionButton/>);
+    var wrapper = render(<ActionButton/>);
+    expect(wrapper.find('ActionButton')).not.toBeNull();
   });
 
   it('an empty cart should have a button with display message to add to cart', () => {

final/client/src/containers/__tests__/logout-button.tsx

@@ -12,11 +12,13 @@ describe('logout button', () => {
   afterEach(cleanup);
 
   it('should renders logout button', async () => {
-    await mount(
+    var wrapper = await mount(
         <MockedProvider
             cache={cache}>
           <LogoutButton />
         </MockedProvider>);
+
+      expect(wrapper.find('LogoutButton')).not.toBeNull();
   });
 
   it('on click of logout button, the user should be completely logout', async () => {