feat: add pytest configuration and implement tests for file and metadata extraction

renamer/test/test_metadata_extractor.py

@@ -0,0 +1,38 @@
+import pytest
+from pathlib import Path
+from renamer.extractors.metadata_extractor import MetadataExtractor
+
+
+class TestMetadataExtractor:
+    @pytest.fixture
+    def test_file(self):
+        """Use the filenames.txt file for testing"""
+        return Path(__file__).parent / "filenames.txt"
+
+    def test_extract_title(self, test_file):
+        """Test extracting title from metadata"""
+        title = MetadataExtractor.extract_title(test_file)
+        # Text files don't have metadata, so should be None
+        assert title is None
+
+    def test_extract_duration(self, test_file):
+        """Test extracting duration from metadata"""
+        duration = MetadataExtractor.extract_duration(test_file)
+        # Text files don't have duration
+        assert duration is None
+
+    def test_extract_artist(self, test_file):
+        """Test extracting artist from metadata"""
+        artist = MetadataExtractor.extract_artist(test_file)
+        # Text files don't have artist
+        assert artist is None
+
+    def test_extract_all_metadata(self, test_file):
+        """Test extracting all metadata"""
+        metadata = MetadataExtractor.extract_all_metadata(test_file)
+        expected = {
+            'title': None,
+            'duration': None,
+            'artist': None
+        }
+        assert metadata == expected