报错信息如下：  Jestencounteredanunexpectedtoken  Jestfailedtoparseafile.Thishappense.g.whenyourcodeoritsdependenciesusenon-standardJavaScriptsyntax,orwhenJestisnotconfiguredtosupportsuchsyntax.报错在这行import'highlight.js/styles/monokai.css'应该是js/css文件没有转换好， 处理方式如下：1.首先安装 babel-jest和 identity-obj-proxyyarnadd