chore(tests): increase speed by running tests in parallel

Author: alukach

.github/workflows/cicd.yaml

@@ -28,4 +28,4 @@ jobs:
       - uses: astral-sh/setup-uv@v4
         with:
           enable-cache: true
-      - run: uv run pytest
+      - run: uv run pytest -n auto

.vscode/settings.json

@@ -1,6 +1,8 @@
 {
   "python.testing.pytestArgs": [
-    "tests"
+    "tests",
+    "-n",
+    "auto"
   ],
   "python.testing.unittestEnabled": false,
   "python.testing.pytestEnabled": true

pyproject.toml

@@ -45,6 +45,7 @@ dev = [
   "pre-commit>=3.5.0",
   "pytest-asyncio>=0.25.1",
   "pytest-cov>=5.0.0",
+  "pytest-xdist>=3.6.1",
   "pytest>=8.3.3",
   "starlette-cramjam>=0.4.0",
 ]

tests/conftest.py

@@ -1,6 +1,7 @@
 """Pytest fixtures."""
 
 import os
+import socket
 import threading
 from typing import Any, AsyncGenerator
 from unittest.mock import DEFAULT, AsyncMock, MagicMock, patch
@@ -118,10 +119,14 @@ def source_api():
     return app
 
 
-@pytest.fixture(scope="session")
+@pytest.fixture()
 def source_api_server(source_api):
     """Run the source API in a background thread."""
-    host, port = "127.0.0.1", 9119
+    sock = socket.socket()
+    sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+    sock.bind(("", 0))
+    port = sock.getsockname()[1]
+    host = "127.0.0.1"
     server = uvicorn.Server(
         uvicorn.Config(
             source_api,