Added pytest for testing, Added pytest and loguru packages to nix shell

shell.nix

@@ -11,8 +11,14 @@ pkgs.mkShell {
       # For SDK configuration
       python-dotenv
 
+      # Logging
+      loguru
+
       # HTTP client
       requests
+
+      # Testing
+      pytest
     ]))
   ];
 }

tests/conftest.py

@@ -0,0 +1,14 @@
+# Library imports
+import pytest
+
+####
+# Global fixtures
+####
+
+# App client for testing
+@pytest.fixture(scope='module')
+def client():
+    app = create_app(config_class='tests/testing_config.py')
+    with app.app_context():
+        yield app
+