Error "Cannot find module 'mem-fs-editor'" when invoking the run-function

[manuth]

Since mem-fs-editor is not a dependency of yeoman-test, this piece of code causes an error sometimes:

yeoman-test/lib/run-result.js

Line 4 in af0e8f1

const MemFsEditor = require('mem-fs-editor');

Me, in my case, I have yeoman-test installed (for testing) and yeoman-environment for injecting version ^3.0.0 into yeoman-test (as recommended in the README).

For me, mem-fs-editor is being installed here: node_modules/yeoman-environment/node_modules/mem-fs-editor
yeoman-test, naturally, is being installed here: node_modules/yeoman-test.

When trying to run yeoman-test I get an error: Cannot find module 'mem-fs-editor'

yeoman-test assumes that mem-fs-editor is located directly in my node_modules folder, but that's not the case for me.
Personally I'd say the problem can be solved by adding mem-fs-editor to the dependencies of yeoman-test. I don't really want to fiddle around with my package-lock.json file

[mshima]

Fixed in 5.1.0