字符回退映射预置表添加测试用例

src/pixel_font_knife/character_fallback_util/__init__.py

@@ -0,0 +1,24 @@
+from importlib import resources
+from os import PathLike
+from typing import TypeAlias, Literal
+
+import yaml
+
+_data_dir = resources.files(__package__).joinpath('data')
+
+PresetName: TypeAlias = Literal[
+    'cjk_unified_to_kangxi_radicals',
+    'cjk_unified_to_radicals_supplement',
+    'inherited_glyphs',
+]
+
+
+def load_yaml(
+        file_path: str | bytes | PathLike[str] | PathLike[bytes],
+) -> dict[int, list[int]]:
+    with open(file_path, 'rb') as file:
+        return yaml.safe_load(file)
+
+
+def load_preset(name: PresetName) -> dict[int, list[int]]:
+    return yaml.safe_load(_data_dir.joinpath(f'{name}.yaml').read_bytes())

tests/test_character_fallback_util.py

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+import unidata_blocks
+
+from pixel_font_knife import character_fallback_util
+
+_block_cjk_unified = unidata_blocks.get_block_by_name('CJK Unified Ideographs')
+_block_kangxi_radicals = unidata_blocks.get_block_by_name('Kangxi Radicals')
+_block_radicals_supplement = unidata_blocks.get_block_by_name('CJK Radicals Supplement')
+
+
+def test_preset_cjk_unified_to_kangxi_radicals():
+    mapping = character_fallback_util.load_preset('cjk_unified_to_kangxi_radicals')
+    for target, code_points in mapping.items():
+        assert target in _block_cjk_unified
+        for code_point in code_points:
+            assert code_point in _block_kangxi_radicals
+
+
+def test_preset_cjk_unified_to_radicals_supplement():
+    mapping = character_fallback_util.load_preset('cjk_unified_to_radicals_supplement')
+    for target, code_points in mapping.items():
+        assert target in _block_cjk_unified
+        for code_point in code_points:
+            assert code_point in _block_radicals_supplement
+
+
+def test_preset_inherited_glyphs():
+    mapping = character_fallback_util.load_preset('inherited_glyphs')
+    for target, code_points in mapping.items():
+        assert target in _block_cjk_unified
+        for code_point in code_points:
+            assert code_point in _block_cjk_unified