Added base testing

tests/fixtures/client.py

+import pytest
+from starlette.testclient import TestClient
+from app import app
+
+
+@pytest.fixture
+def sti() -> TestClient:
+    """ Starlette TestClient Instance, wrapped in fixture """
+    return TestClient(app)

tests/test_service.py

+import httpx as httpx
+from tests.fixtures.client import sti
+
+
+def test_ping(sti):
+    resp: httpx.Response = sti.get("/ping")
+    print(resp.text)
+    data = resp.json()
+    assert data == {"ok": True, "data": {}}