fixes #1189, fixes nav tests so that the app will actually redeploy

Author: catarak

client/components/Nav.jsx

@@ -663,7 +663,9 @@ Nav.propTypes = {
   setAllAccessibleOutput: PropTypes.func.isRequired,
   newFile: PropTypes.func.isRequired,
   newFolder: PropTypes.func.isRequired,
-  rootFile: PropTypes.func.isRequired
+  rootFile: PropTypes.shape({
+    id: PropTypes.string.isRequired
+  }).isRequired
 };
 
 Nav.defaultProps = {

client/components/__test__/Nav.test.jsx

@@ -39,7 +39,12 @@ describe('Nav', () => {
     },
     startSketch: jest.fn(),
     stopSketch: jest.fn(),
-    setAllAccessibleOutput: jest.fn()
+    setAllAccessibleOutput: jest.fn(),
+    showToast: jest.fn(),
+    setToastText: jest.fn(),
+    rootFile: {
+      id: 'root-file'
+    }
   };
   const getWrapper = () => shallow(<NavComponent {...props} />);