feat: introduced pytest powered tests

tests/conftest.py

@@ -0,0 +1,17 @@
+import sys
+from pathlib import Path
+
+import pytest
+from fastapi.testclient import TestClient
+
+sys.path.insert(0, str(Path(__file__).resolve().parents[1]))
+
+from main import app
+
+
+@pytest.fixture
+def client():
+    app.dependency_overrides.clear()
+    with TestClient(app, raise_server_exceptions=False) as test_client:
+        yield test_client
+    app.dependency_overrides.clear()