Start our own instance of fpserver for tests

tests/conftest.py

@@ -1,8 +1,42 @@
 import requests
 import pytest
+import subprocess
+import socket
 from urllib.parse import urljoin
 
 
+@pytest.fixture(scope='session')
+def server_port():
+    sock = socket.socket()
+    sock.bind(('', 0))
+    return sock.getsockname()[1]
+
+
+@pytest.fixture(scope='session')
+def server(server_port, tmp_path_factory):
+    tmp_dir = tmp_path_factory.mktemp("server")
+    data_dir = tmp_dir / 'data'
+    stderr = tmp_dir / 'server.stderr.log'
+    command = [
+        'zig-out/bin/fpindex',
+        '--dir', str(data_dir),
+        '--port', str(server_port),
+        '--log-level', 'debug',
+    ]
+    process = subprocess.Popen(
+        command,
+        stdin=subprocess.DEVNULL,
+        stdout=subprocess.DEVNULL,
+        stderr=stderr.open('w'),
+    )
+    yield
+    process.terminate()
+    retcode = process.wait()
+    if retcode != 0:
+        for line in stderr.read_text().splitlines():
+            print(line)
+
+
 @pytest.fixture
 def index_name():
     return 'testidx'
@@ -36,8 +70,8 @@ def session():
 
 
 @pytest.fixture
-def client(session):
-    return Client(session, 'http://localhost:8080')
+def client(session, server_port, server):
+    return Client(session, f'http://localhost:{server_port}')
 
 
 @pytest.fixture(autouse=True)