Initial release: cd-browser v0.1.0

tests/test_filesystem.py

@@ -0,0 +1,46 @@
+from pathlib import Path
+
+import pytest
+
+from app.filesystem import DirectoryEntry, has_subdirectories, list_directories
+
+
+def test_has_subdirectories_detects_nested_directory(tmp_path: Path) -> None:
+    parent = tmp_path / "parent"
+    child = parent / "child"
+    child.mkdir(parents=True)
+
+    assert has_subdirectories(parent) is True
+
+
+def test_has_subdirectories_returns_false_without_nested_directories(
+    tmp_path: Path,
+) -> None:
+    directory = tmp_path / "empty"
+    directory.mkdir()
+    (directory / "file.txt").write_text("content", encoding="utf-8")
+
+    assert has_subdirectories(directory) is False
+
+
+def test_list_directories_returns_sorted_directory_metadata(tmp_path: Path) -> None:
+    alpha = tmp_path / "alpha"
+    beta = tmp_path / "Beta"
+    file_path = tmp_path / "notes.txt"
+
+    alpha.mkdir()
+    beta.mkdir()
+    (beta / "nested").mkdir()
+    file_path.write_text("ignore me", encoding="utf-8")
+
+    assert list_directories(tmp_path) == [
+        DirectoryEntry(name="alpha", path=alpha, has_children=False),
+        DirectoryEntry(name="Beta", path=beta, has_children=True),
+    ]
+
+
+def test_list_directories_raises_for_missing_directory(tmp_path: Path) -> None:
+    missing_path = tmp_path / "missing"
+
+    with pytest.raises(FileNotFoundError):
+        list_directories(missing_path)