Create general database test

[joeflack4]

Description

Continue from here:

# class TestDB(unittest.TestCase):  # TODO: Adapt from tutorial.
#     """Test database functionality.
#
#     Tutorial: http://flask.pocoo.org/docs/0.12/testing/
#     """
#
#     def setUp(self):
#         """Set up: (1) Put Flask app in test mode, (2) Create temp DB."""
#         import tempfile
#         from manage import initdb
#         self.db_fd, app.config['DATABASE'] = tempfile.mkstemp()
#         app.testing = True
#         self.app = app.test_client()
#         with app.app_context():
#             initdb()
#
#     def tearDown(self):
#         """Tear down: (1) Close temp DB."""
#         os.close(self.db_fd)
#         os.unlink(app.config['DATABASE'])
#
#     def test_empty_db(self):
#         """Test empty database."""
#         resp = self.app.get('/')
#         assert b'No entries here so far' in resp.data