js-diff单元测试用例
该测试用例基于OpenHarmony系统下，采用原库测试用例 进行单元测试
单元测试用例覆盖情况
| 接口名 | 是否通过 | 备注 |
|---|---|---|
| diffChars | pass | |
| diffWords | pass | |
| diffWordsWithSpace | pass | |
| diffLines | pass | |
| diffTrimmedLines | pass | |
| diffSentences | pass | |
| diffCss | pass | |
| diffJson | pass | |
| diffArrays | pass | |
| createPatch | pass | |
| createTwoFilesPatch | pass | |
| structuredPatch | pass | |
| parsePatch | pass | |
| convertChangesToXML | pass | |
| canonicalize | pass | |
| merge | pass | |
| applyPatch | pass | |
| applyPatches | pass |