add unit test coverage for TowerLogo.jsx

__tests__/App.test.jsx

@@ -108,17 +108,6 @@ describe('<App />', () => {
     });
   });
 
-  test('onLogoClick sets selected nav back to defaults', () => {
-    const appWrapper = shallow(<App />);
-
-    appWrapper.setState({ activeGroup: 'foo', activeItem: 'bar' });
-    expect(appWrapper.state().activeItem).toBe('bar');
-    expect(appWrapper.state().activeGroup).toBe('foo');
-
-    appWrapper.instance().onLogoClick();
-    expect(appWrapper.state().activeGroup).toBe(DEFAULT_ACTIVE_GROUP);
-  });
-
   test('onLogout makes expected call to api client', async (done) => {
     const logout = jest.fn(() => Promise.resolve());
     const api = { logout };

__tests__/components/TowerLogo.test.jsx

@@ -29,11 +29,10 @@ describe('<TowerLogo />', () => {
   });
 
   test('adds navigation to route history on click', () => {
-    const onLogoClick = jest.fn();
     logoWrapper = mount(
       <MemoryRouter>
         <I18nProvider>
-          <TowerLogo onClick={onLogoClick} />
+          <TowerLogo linkTo="/" />
         </I18nProvider>
       </MemoryRouter>
     );
@@ -43,12 +42,26 @@ describe('<TowerLogo />', () => {
     expect(towerLogoElem.props().history.length).toBe(2);
   });
 
+  test('linkTo prop is optional', () => {
+    logoWrapper = mount(
+      <MemoryRouter>
+        <I18nProvider>
+          <TowerLogo />
+        </I18nProvider>
+      </MemoryRouter>
+    );
+    findChildren();
+    expect(towerLogoElem.props().history.length).toBe(1);
+    logoWrapper.simulate('click');
+    expect(towerLogoElem.props().history.length).toBe(1);
+  });
+
   test('handles mouse over and out state.hover changes', () => {
     const onLogoClick = jest.fn();
     logoWrapper = mount(
       <MemoryRouter>
         <I18nProvider>
-          <TowerLogo onClick={onLogoClick} />
+          <TowerLogo />
         </I18nProvider>
       </MemoryRouter>
     );