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/frame_constants.py

@@ -0,0 +1,74 @@
+"""Frame class and resolution constants.
+
+This module defines video resolution frame classes (480p, 720p, 1080p, 4K, 8K, etc.)
+and their nominal heights and typical widths.
+
+Also includes non-standard quality indicators that appear in filenames but don't
+represent specific resolutions.
+"""
+
+# Non-standard quality indicators that don't have specific resolution values
+# These are used in filenames to indicate quality but aren't proper frame classes
+# When found, we return None instead of trying to classify them
+# Note: We have specific frame classes like "2160p" (4K) and "4320p" (8K),
+# but when files use just "4K" or "8K" without the "p" suffix, we can't determine
+# the exact resolution, so we treat them as non-standard indicators
+NON_STANDARD_QUALITY_INDICATORS = ['SD', 'LQ', 'HD', 'QHD', 'FHD', 'FullHD', '4K', '8K']
+
+FRAME_CLASSES = {
+    "480p": {
+        "nominal_height": 480,
+        "typical_widths": [640, 704, 720],
+        "description": "Standard Definition (SD) - DVD quality",
+    },
+    "480i": {
+        "nominal_height": 480,
+        "typical_widths": [640, 704, 720],
+        "description": "Standard Definition (SD) interlaced - NTSC quality",
+    },
+    "360p": {
+        "nominal_height": 360,
+        "typical_widths": [480, 640],
+        "description": "Low Definition (LD) - 360p",
+    },
+    "576p": {
+        "nominal_height": 576,
+        "typical_widths": [720, 768],
+        "description": "PAL Standard Definition (SD) - European DVD quality",
+    },
+    "576i": {
+        "nominal_height": 576,
+        "typical_widths": [720, 768],
+        "description": "PAL Standard Definition (SD) interlaced - European quality",
+    },
+    "720p": {
+        "nominal_height": 720,
+        "typical_widths": [1280],
+        "description": "High Definition (HD) - 720p HD",
+    },
+    "1080p": {
+        "nominal_height": 1080,
+        "typical_widths": [1920],
+        "description": "Full High Definition (FHD) - 1080p HD",
+    },
+    "1080i": {
+        "nominal_height": 1080,
+        "typical_widths": [1920],
+        "description": "Full High Definition (FHD) interlaced - 1080i HD",
+    },
+    "1440p": {
+        "nominal_height": 1440,
+        "typical_widths": [2560],
+        "description": "Quad High Definition (QHD) - 1440p 2K",
+    },
+    "2160p": {
+        "nominal_height": 2160,
+        "typical_widths": [3840],
+        "description": "Ultra High Definition (UHD) - 2160p 4K",
+    },
+    "4320p": {
+        "nominal_height": 4320,
+        "typical_widths": [7680],
+        "description": "Ultra High Definition (UHD) - 4320p 8K",
+    },
+}