test: add tests for launch

tests/main.py

@@ -17,3 +17,4 @@
 import routes
 import test_secrets
 import test_stats
+import test_launch

tests/test_launch.py

@@ -0,0 +1,28 @@
+"""
+Test if PAPI launches correctly.
+
+Sometimes can fail, especially with the @repeat_every() task (fastapi_utils
+package error).
+"""
+
+import subprocess
+import requests
+import time
+
+
+server_process = subprocess.Popen(
+    ['uvicorn', 'ai4papi.main:app', '--host', '0.0.0.0', '--port', '8080'],
+    stdout=subprocess.DEVNULL,
+    stderr = subprocess.DEVNULL,
+    )
+time.sleep(15)  # wait for PAPI to start
+
+try:
+    response = requests.get("http://0.0.0.0:8080")
+    assert response.status_code == 200, "PAPI status code is not 200"
+except requests.exceptions.ConnectionError:
+    raise Exception("Failed to connect to the server")
+finally:
+    server_process.kill()
+
+print("PAPI launch tests successful!")