fix: improve code coverage-cangjie_stdx-AtomGit

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已合并

fix: improve code coverage #742

kangyi创建于 8月3日从Mr_Kang_Yi/cangjie_stdx： bugfix_add_api_and_test_case 合入到 Cangjie/cangjie_stdx： main

fix: improve code coverage #742

已合并

kangyi创建于 8月3日

从Mr_Kang_Yi/cangjie_stdx bugfix_add_api_and_test_case合入到Cangjie/cangjie_stdx main