【Jest】jest 测试通过但测试覆盖率报告空白

问题描述

单元测试跑通了，但是去访问coverage测试报告时，没有代码覆盖率，控制台提示如下：

Handlebars: Access has been denied to resolve the property "statements" because it is not an "own property" of its parent.
You can add a runtime option to disable the check or this warning:
See https://handlebarsjs.com/api-reference/runtime-options.html#options-to-control-prototype-access for details

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原因分析：

handlebars 版本问题

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解决方案：

npm list handlebars //查看版本信息
npm uninstall -g handlebars //卸载当前版本
npm install handlebars@4.5.3 //安装