Skip unrar tests on Windows

tests/datasets/test_nwpu.py

@@ -1,6 +1,7 @@
 import os
 from pathlib import Path
 import shutil
+import sys
 from typing import Generator
 
 from _pytest.fixtures import SubRequest
@@ -26,6 +27,8 @@ def download_url(url: str, root: str, *args: str) -> None:
     shutil.copy(url, root)
 
 
+# TODO: figure out how to install unrar on Windows in GitHub Actions
+@pytest.mark.skipif(sys.platform == "win32", reason="requires unrar executable")
 class TestVHR10:
     @pytest.fixture(params=["positive", "negative"])
     def dataset(