Cannot find module - VueSSRServerPlugin

[MadLittleMods]

• webpack@4.29.0
• mocha-webpack@2.0.0-beta.0

I was getting this error when running mocha-webpack -> Error: Cannot find module '> webapp\output\assets\js\server-bundle.js'

I was trying to re-use the server-side rendering Vue webpack config in testing, https://gitlab.com/gitlab-org/gitter/webapp/blob/49cc5b37f6691e500dcb23b9dc57fd338ef1a02d/public/js/webpack.server.config.js

But the problem is plugins: [new VueSSRServerPlugin()] which turns the entire output of the server build into a single JSON file.

I solved this by just creating a separate test config without that plugin. Following along with https://vue-test-utils.vuejs.org/guides/testing-single-file-components-with-mocha-webpack.html

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$ npm run mocha-webpack -- test\public-js\vue\left-menu\components\list-item-test.js

 WEBPACK  Compiled successfully in 1759ms

 MOCHA  Testing...

 RUNTIME EXCEPTION  Exception occurred while loading your tests

Error: Cannot find module '> webapp\output\assets\js\server-bundle.js'
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:581:15)
    at Function._resolveFilename (> webapp\node_modules\mocha-webpack\lib\util\registerRequireHook.js:44:34)
    at Function.Module._load (internal/modules/cjs/loader.js:507:25)
    at Module.require (internal/modules/cjs/loader.js:637:17)
    at require (internal/modules/cjs/helpers.js:22:18)
    at > webapp\node_modules\mocha\lib\mocha.js:250:27
    at Array.forEach (<anonymous>)
    at Mocha.loadFiles (> webapp\node_modules\mocha\lib\mocha.js:247:14)
    at Mocha.run (> webapp\node_modules\mocha\lib\mocha.js:576:10)
    at > webapp\node_modules\mocha-webpack\lib\runner\TestRunner.js:191:27
    at > webapp\node_modules\mocha-webpack\lib\webpack\compiler\registerReadyCallback.js:26:7
    at AsyncSeriesHook.eval [as callAsync] (eval at create (> webapp\node_modules\tapable\lib\HookCodeFactory.js:32:10), <anonymous>:27:1)
    at AsyncSeriesHook.lazyCompileHook (> webapp\node_modules\tapable\lib\Hook.js:154:20)
    at emitRecords.err (> webapp\node_modules\webpack\lib\Compiler.js:267:22)
    at Compiler.emitRecords (> webapp\node_modules\webpack\lib\Compiler.js:449:39)
    at emitAssets.err (> webapp\node_modules\webpack\lib\Compiler.js:261:10)
    at hooks.afterEmit.callAsync.err (> webapp\node_modules\webpack\lib\Compiler.js:435:14)
    at AsyncSeriesHook.eval [as callAsync] (eval at create (> webapp\node_modules\tapable\lib\HookCodeFactory.js:32:10), <anonymous>:9:1)
    at AsyncSeriesHook.lazyCompileHook (> webapp\node_modules\tapable\lib\Hook.js:154:20)
    at asyncLib.forEachLimit.err (> webapp\node_modules\webpack\lib\Compiler.js:432:27)
    at > webapp\node_modules\neo-async\async.js:2813:7
    at done (> webapp\node_modules\neo-async\async.js:3521:9)
    at MemoryFileSystem.writeFile (> webapp\node_modules\memory-fs\lib\MemoryFileSystem.js:328:9)
    at writeOut (> webapp\node_modules\webpack\lib\Compiler.js:415:30)
    at asyncLib.forEachLimit (> webapp\node_modules\webpack\lib\Compiler.js:426:7)
    at objectIteratorWithKey (> webapp\node_modules\neo-async\async.js:3508:9)
    at timesSync (> webapp\node_modules\neo-async\async.js:2292:7)
    at Object.eachLimit (> webapp\node_modules\neo-async\async.js:3463:5)
    at emitFiles (> webapp\node_modules\webpack\lib\Compiler.js:321:13)
    at Immediate._onImmediate (> webapp\node_modules\memory-fs\lib\MemoryFileSystem.js:288:4)
    at runCallback (timers.js:705:18)
    at tryOnImmediate (timers.js:676:5)
    at processImmediate (timers.js:658:5)

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https://gitlab.com/gitlab-org/gitter/webapp/merge_requests/1360