TypeError: Arguments to path.resolve must be strings

[llorllale]

Given() not working:

devDependencies:

  "devDependencies": {
    "chai": "4.2.0",
    "cucumber": "6.0.5",
    "karma": "4.4.1",
    "karma-chai": "0.1.0",
    "karma-chrome-launcher": "3.1.0",
    "karma-cucumber-js-latest": "1.0.5",
    "karma-mocha": "1.3.0",
    "mocha": "7.0.1",
    "puppeteer": "2.1.1"
  },

karma.conf.js:

process.env.CHROME_BIN = require('puppeteer').executablePath()

module.exports = function(config) {
    config.set({
        frameworks: ["mocha", "chai", "cucumber-js"],
        browsers: ["ChromeHeadless"],
        singleRun: true,
        files: [
            {pattern: "test/**/*.js", type: "module"},
            ...
            {pattern: "features/*.feature", included: false},
        ],
        plugins: [
            "karma-mocha",
            "karma-chai",
            "karma-chrome-launcher",
            "karma-cucumber-js-latest"
        ]
    })
}

test_steps:

const Given = Cucumber.Given
const When = Cucumber.When
const Then = Cucumber.Then

// ... some code ....

Given(/regex/, function() {
    // test code
})

Error:

21 02 2020 16:56:52.874:INFO [karma-server]: Karma v4.4.1 server started at http://0.0.0.0:9876/
21 02 2020 16:56:52.876:INFO [launcher]: Launching browsers ChromeHeadless with concurrency unlimited
21 02 2020 16:56:52.878:INFO [launcher]: Starting browser ChromeHeadless
21 02 2020 16:56:53.152:INFO [HeadlessChrome 80.0.3987 (Linux 0.0.0)]: Connected on socket iFJHo9Ucr6Sa13uLAAAA with id 6284202
HeadlessChrome 80.0.3987 (Linux 0.0.0) ERROR
  Uncaught TypeError: Arguments to path.resolve must be strings
  at node_modules/cucumber/dist/cucumber.js:47815:13
  
  TypeError: Arguments to path.resolve must be strings
      at Object.exports.resolve (node_modules/cucumber/dist/cucumber.js:47815:13)
      at Object.exports.relative (node_modules/cucumber/dist/cucumber.js:47876:18)
      at getDefinitionLineAndUri (node_modules/cucumber/dist/cucumber.js:64807:28)
      at buildStepDefinition (node_modules/cucumber/dist/cucumber.js:64773:32)
      at SupportCodeLibraryBuilder.defineStep (node_modules/cucumber/dist/cucumber.js:64956:67)
      at test/test_steps.js:45:1


npm ERR! Test failed.  See above for more details.

[mitcoding]

Just saw this. You don't need to import cucumber. it's already imported when karma has been configured correctly, meaning Given/When/Then already exists as global variables for all step files. take a look at my redux-forth project that use this karma plugin

https://github.com/mitcoding/redux-forth/blob/master/src/test/javascript/feature/redux.steps.js

https://github.com/mitcoding/redux-forth/blob/master/karma.config.js

[mitcoding]

The other thing that might be keeping the globals from working is the the step files for cucumeber need to be in a folder called steps "/steps/foo.js" or the file name needs to end in ".steps.js" e.g. foo.steps.js.