Karma Webpack error - path" argument must be of type string

Question

I'm trying to add Karma to a project and failing at the webpack step.

When I try configure webpack to be called by Karma I get an error:

07 09 2018 13:52:41.487:ERROR [karma]: TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string. Received type undefined
    at assertPath (path.js:39:11)
    at Object.join (path.js:434:7)
    at webpackPlugin.readFile (C:\Users\Toby\Documents\GitHub\cncjs-testing2\node_modules\karma-webpack\lib\karma-webpack.js:318:30)
    at Plugin.<anonymous> (C:\Users\Toby\Documents\GitHub\cncjs-testing2\node_modules\karma-webpack\lib\karma-webpack.js:276:17)
    at Plugin.readFile (C:\Users\Toby\Documents\GitHub\cncjs-testing2\node_modules\karma-webpack\lib\karma-webpack.js:293:9)
    at process._tickCallback (internal/process/next_tick.js:61:11)

I (think) I have narrowed this down to the following line:

let outputPath = webpackPlugin.outputs[filename];

Where

webpackPlugin.outputs = { 'test/web/tests.webpack.jsx': 'output.js' }

and

filename = test\web\tests.webpack.jsx

So the slashes are round the wrong way but I don't know what I've done to cause this in the configuration.

For anybody that's interested, the project is CNCjs

Karma Webpack error - path" argument must be of type string

0 Answers0