Add comprehensive tests for formatter classes, services, and utilities

- Introduced tests for various formatter classes including TextFormatter, DurationFormatter, SizeFormatter, DateFormatter, and more to ensure correct formatting behavior.
- Added tests for service classes such as FileTreeService, MetadataService, and RenameService, covering directory validation, metadata extraction, and file renaming functionalities.
- Implemented utility tests for LanguageCodeExtractor, PatternExtractor, and FrameClassMatcher to validate their extraction and matching capabilities.
- Updated test cases to use datasets for better maintainability and clarity.
- Enhanced error handling tests to ensure robustness against missing or invalid data.

renamer/constants/media_constants.py

@@ -0,0 +1,46 @@
+"""Media type constants for supported video formats.
+
+This module defines all supported video container formats and their metadata.
+"""
+
+MEDIA_TYPES = {
+    "mkv": {
+        "description": "Matroska multimedia container",
+        "meta_type": "Matroska",
+        "mime": "video/x-matroska",
+    },
+    "mk3d": {
+        "description": "Matroska 3D multimedia container",
+        "meta_type": "Matroska",
+        "mime": "video/x-matroska",
+    },
+    "avi": {
+        "description": "Audio Video Interleave",
+        "meta_type": "AVI",
+        "mime": "video/x-msvideo",
+    },
+    "mov": {
+        "description": "QuickTime movie",
+        "meta_type": "QuickTime",
+        "mime": "video/quicktime",
+    },
+    "mp4": {
+        "description": "MPEG-4 video container",
+        "meta_type": "MP4",
+        "mime": "video/mp4",
+    },
+    "wmv": {
+        "description": "Windows Media Video",
+        "meta_type": "ASF",
+        "mime": "video/x-ms-wmv",
+    },
+    "flv": {"description": "Flash Video", "meta_type": "FLV", "mime": "video/x-flv"},
+    "webm": {
+        "description": "WebM multimedia",
+        "meta_type": "WebM",
+        "mime": "video/webm",
+    },
+    "m4v": {"description": "MPEG-4 video", "meta_type": "MP4", "mime": "video/mp4"},
+    "3gp": {"description": "3GPP multimedia", "meta_type": "MP4", "mime": "video/3gpp"},
+    "ogv": {"description": "Ogg Video", "meta_type": "Ogg", "mime": "video/ogg"},
+}