test: test more platforms

.github/workflows/ci.yml

@@ -14,6 +14,10 @@ on:
   schedule:
     - cron: "1 0 */7 * *"
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   pre-commit:
     name: Format
@@ -40,7 +44,7 @@ jobs:
       fail-fast: false
       matrix:
         python-version: ["3.8", "3.9", "3.10", "3.11"]
-        runs-on: [ubuntu-latest]
+        runs-on: [ubuntu-latest, macos-latest]
 
     steps:
       - uses: actions/checkout@v3

tests/conftest.py

@@ -0,0 +1,44 @@
+from __future__ import annotations
+
+import os
+import shutil
+import subprocess
+import time
+
+import pytest
+
+
+@pytest.fixture(scope="module")
+def available_port():
+    """
+    Get an available port on localhost.
+    """
+    import socket
+
+    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
+        # Bind to port 0 to let the OS choose an available port
+        s.bind(("localhost", 0))
+        # Get the selected port
+        _, port = s.getsockname()
+    return port
+
+
+@pytest.fixture(scope="module")
+def server(tmpdir_factory, available_port):
+    srvdir = tmpdir_factory.mktemp("srv")
+    tmp_path = os.path.join(srvdir, "Folder")
+    os.mkdir(tmp_path)
+    xrootd_executable = shutil.which("xrootd")
+    proc = subprocess.Popen([xrootd_executable, "-p", str(available_port), str(srvdir)])
+    time.sleep(2)  # give it some startup
+    yield f"root://localhost:{available_port}/{tmp_path}", tmp_path
+    proc.terminate()
+    proc.wait(timeout=10)
+
+
+@pytest.fixture()
+def clear_server(server):
+    url, path = server
+    shutil.rmtree(path)
+    os.mkdir(path)
+    yield