Test that the environment variable was set.

test/config.py

@@ -0,0 +1,13 @@
+import unittest
+import os
+from dotenv import load_dotenv
+
+load_dotenv()
+
+class ConfigProject(unittest.TestCase):
+    def test_env_variables(self):
+        self.assertIsNotNone(os.getenv("DB_PASSWORD"))
+
+
+if __name__ == '__main__':
+    unittest.main()