Intern-cucumber plugin error: A plugin named "cucumber" has not been registered

Question

I'm trying to get the intern-cucumber plugin working. I get the following error:

Error: A plugin named "cucumber" has not been registered
  at Node.BaseExecutor.getPlugin @ src\lib\executors\Executor.ts:387:12
  @ tests\addition.js:6:29
  at runFactory @ node_modules\dojo\dojo.js:1134:43
  at execModule @ node_modules\dojo\dojo.js:1262:5
  at execModule @ node_modules\dojo\dojo.js:1253:12
  @ node_modules\dojo\dojo.js:1297:6
  at guardCheckComplete @ node_modules\dojo\dojo.js:1277:5
  at checkComplete @ node_modules\dojo\dojo.js:1292:4
  at contextRequire @ node_modules\dojo\dojo.js:835:6
  at req @ node_modules\dojo\dojo.js:124:11
  @ src\loaders\dojo.ts:36:8
  at new Promise @ anonymous
  at Node._loader @ src\loaders\dojo.ts:29:13
  at Node._loadFunctionalSuites @ src\lib\executors\Node.ts:593:29
  @ src\lib\executors\Node.ts:882:24
  @ node_modules\@theintern\common\index.js:16:7174

Any ideas on how to solve this? My intern.json configuration file looks like:

{
  "loader": {
    "script": "dojo",
    "options": {
      "packages": [
        {
          "name": "features",
          "location": "features"
        },
        {
          "name": "models",
          "location": "models"
        },
        {
          "name": "dojo", 
          "location":  "node_modules/dojo"
        }
      ]
    }
  },
  "functionalSuites": "tests/**.js",
  "environments": [ "chrome" ],
  "browser": {
    "plugins": [
      "node_modules/intern-cucumber/browser/plugin.js"
    ]
  },
  "node": {
    "plugins": "node_modules/intern-cucumber/plugin.js"
  }

}

And my test file, where the error is happening, addition.js looks like:

define([
    'models/calculator',
    'dojo/text!features/addition.feature'
], function (calculator, featureSrc) {

    const cucumber = intern.getPlugin('cucumber');
    const assert = intern.getPlugin('chai').assert; 

    cucumber.registerCucumber('Calculator addition', featureSrc, function () {

        cucumber.Given('the calculator is cleared', function () {

        });

        cucumber.When(/^I add (\d+) and (\d+)$/, function (x, y) {
            var calc = new Calculator(x, y)

        })

        cucumber.Then(/^the result should be (\d+)$/, function (z) {
            var result = calc.sum();
            assert.equal(z,result,'Expected result to be: ' + z)
        })
    }

    )
}

)

Does anyone have ANY idea how to solve this? No idea why the plugin wouldn't work, is there something wrong with my intern.json file??

Answer 1

The code is calling intern.getPlugin('cucumber'). It should actually be calling intern.getPlugin('interface.cucumber') or intern.getInterface('cucumber') (the former is preferred).

Intern has an API specifically for registering and retrieving interfaces (registerInterface and getInterface). However, it's just a thin wrapper around the general plugin API (registerPlugin and getPlugin) that adds interface. to the plugin name. The interface API will likely be removed in the future in favor of just having the single plugin API.