uses the version of vue-cli 3.2.1
creates a new project via vue-cli
does not select jest unit tests when selecting preset plug-ins
while vue-cli3.0 can add plug-ins after the project is created
execute the following command on the command line
vue add @vue/cli-plugin-unit-jest
but misreported
this error message is very strange. On the one hand, you have successfully installed the plug-in, on the other hand, you are asked whether you have forgotten to install the plug-in
and the following command does not work
vue add @vue/unit-jest
vue invoke @vue/cli-plugin-unit-jest
vue invoke @vue/unit-jest
how exactly is this plug-in installed