fix(ui): return correct templates

Contents/Code/webapp.py

@@ -106,6 +106,11 @@
 database_cache_lock = Lock()
 
 
+responses = {
+    500: Response(response='Internal Server Error', status=500, mimetype='text/plain')
+}
+
+
 @babel.localeselector
 def get_locale():
     # type: () -> str
@@ -387,16 +392,15 @@
     --------
     >>> home()
     """
-    items = []
+    if not os.path.isfile(database_cache_file):
+        return render_template('home_db_not_cached.html', title='Home')
+
     try:
         items = json.loads(Core.storage.load(filename=database_cache_file, binary=False))
     except IOError:
-        pass
+        return responses[500]
 
-    if items:
-        return render_template('home.html', title='Home', items=items)
-    else:
-        return render_template('home_db_not_cached.html', title='Home')
+    return render_template('home.html', title='Home', items=items)
 
 
 @app.route("/<path:img>", methods=["GET"])

tests/functional/test_webapp.py

@@ -1,8 +1,26 @@
 # -*- coding: utf-8 -*-
 
+# standard imports
+import os
+
 # lib imports
 import pytest
 
+# local imports
+from Code import webapp
+
+
+@pytest.fixture(scope='function')
+def remove_themerr_db_cache_file():
+    _backup_file_name = "{}.bak".format(webapp.database_cache_file)
+
+    # rename the file, so it is not found
+    os.rename(webapp.database_cache_file, _backup_file_name)
+    yield
+
+    # rename the file back
+    os.rename(_backup_file_name, webapp.database_cache_file)
+
 
 def test_home(test_client):
     """
@@ -21,6 +39,23 @@ def test_home(test_client):
         response = test_client.get('/home')
         assert response.status_code == 200
 
+        assert 'id="section_' in response.data.decode('utf-8')
+
+
+def test_home_without_cache(remove_themerr_db_cache_file, test_client):
+    """
+    WHEN the '/' page is requested (GET)
+    THEN check that the response is valid
+    """
+    try:
+        response = test_client.get('/')
+    except AttributeError:
+        pytest.skip("cannot access Plex token/server")
+    else:
+        assert response.status_code == 200
+
+        assert 'Database is being cached' in response.data.decode('utf-8')
+
 
 def test_image(test_client):
     """