feat(v2): complete v2 reimplementation

tests/unit/test_exclusions.py

@@ -0,0 +1,25 @@
+from __future__ import annotations
+
+import pytest
+from backup_tool.exclusions import ExclusionError, matches
+
+
+@pytest.mark.parametrize(
+    ("path", "patterns", "expected"),
+    [
+        ("notes.tmp", ["*.tmp"], True),
+        ("nested/notes.tmp", ["*.tmp"], True),
+        ("cache/item.txt", ["cache/"], True),
+        ("cache/keep.txt", ["cache/", "!cache/keep.txt"], False),
+        ("data/keep.txt", ["data/**"], True),
+        ("data.txt", ["data/**"], False),
+    ],
+)
+def test_gitignore_like_exclusions(path: str, patterns: list[str], expected: bool) -> None:
+    assert matches(path, patterns) is expected
+
+
+@pytest.mark.parametrize("value", ["../escape", "/absolute", "windows\\path", ""])
+def test_exclusions_reject_unsafe_paths(value: str) -> None:
+    with pytest.raises(ExclusionError):
+        matches("safe.txt", [value])