Add the conftest file

tests/conftest.py

@@ -0,0 +1,21 @@
+from pathlib import Path
+
+import pytest
+from packaging.version import Version
+
+from ruff_lsp.server import _find_ruff_binary, _get_global_defaults, uris
+
+
+@pytest.fixture(scope="session")
+def ruff_version() -> Version:
+    # Use the ruff-lsp directory as the workspace
+    workspace_path = Path(__file__).parent.parent
+
+    settings = {
+        **_get_global_defaults(),  # type: ignore[misc]
+        "cwd": None,
+        "workspacePath": workspace_path,
+        "workspace": uris.from_fs_path(workspace_path),
+    }
+
+    return _find_ruff_binary(settings, version_requirement=None).version