test: fix windows path separator

Make list of files in a stable order for comparison.

Author: krerkkiat

tests/test_cli.py

@@ -1,4 +1,5 @@
 import json
+import sys
 from pathlib import Path
 
 from click.testing import CliRunner
@@ -33,8 +34,11 @@ def test_collect_autograding_tests_command():
 
         result = runner.invoke(collect_autograding_tests_command)
         assert result.exit_code == 0
-        assert result.output == "processing lorem-ipsum/problem.toml\n"
-        expected_file_path = Path("./.github/classroom/autograding.json")
+        if sys.platform == "win32":
+            assert result.output == "processing lorem-ipsum\\problem.toml\n"
+        else:
+            assert result.output == "processing lorem-ipsum/problem.toml\n"
+        expected_file_path = Path(".github") / "classroom" / "autograding.json"
         assert expected_file_path.exists()
         with open(expected_file_path) as f:
             data = json.load(f)

tests/test_common.py

@@ -92,7 +92,8 @@ def test_populate_folder_with_filenames():
         expected_files = ["a", "b", "c"]
         populate_folder_with_filenames(tmpdir, expected_files)
 
-        result_names = [item.name for item in tmpdir_path.iterdir()]
+        # Order should not matter, we just want check that all files are created.
+        result_names = sorted([item.name for item in tmpdir_path.iterdir()])
 
         assert result_names == expected_files