Running @vue/cli-plugin-e2e-nightwatch tests in parallel

[pdrivom]

Version

5.0.8

Environment info

  System:
    OS: Linux 5.10 Ubuntu 20.04.5 LTS (Focal Fossa)
    CPU: (8) x64 11th Gen Intel(R) Core(TM) i7-1185G7 @ 3.00GHz
  Binaries:
    Node: 14.20.0 - /usr/bin/node
    Yarn: Not Found
    npm: 8.19.2 - /usr/bin/npm
  Browsers:
    Chrome: 105.0.5195.102
    Firefox: Not Found
  npmPackages:
    @intlify/vue-devtools:  9.2.2 
    @intlify/vue-i18n-loader: ^4.2.0 => 4.2.0 
    @oreliain/vue-i18n-extract-keys: ^2.1.1 => 2.1.1 
    @vue/babel-helper-vue-jsx-merge-props:  1.2.1 
    @vue/babel-helper-vue-transform-on:  1.0.2 
    @vue/babel-plugin-jsx:  1.1.1 
    @vue/babel-plugin-transform-vue-jsx:  1.2.1 
    @vue/babel-preset-app:  5.0.8 
    @vue/babel-preset-jsx:  1.3.0 
    @vue/babel-sugar-composition-api-inject-h:  1.3.0 
    @vue/babel-sugar-composition-api-render-instance:  1.3.0 
    @vue/babel-sugar-functional-vue:  1.2.2 
    @vue/babel-sugar-inject-h:  1.2.2 
    @vue/babel-sugar-v-model:  1.3.0 
    @vue/babel-sugar-v-on:  1.3.0 
    @vue/cli-overlay:  5.0.8 
    @vue/cli-plugin-babel: ^5.0.8 => 5.0.8 
    @vue/cli-plugin-e2e-nightwatch: ^5.0.8 => 5.0.8 
    @vue/cli-plugin-eslint: ^5.0.8 => 5.0.8 
    @vue/cli-plugin-router:  5.0.8 
    @vue/cli-plugin-vuex:  5.0.8 
    @vue/cli-service: ^5.0.8 => 5.0.8 
    @vue/cli-shared-utils:  5.0.8 
    @vue/compiler-core:  3.2.39 
    @vue/compiler-dom:  3.2.39 
    @vue/compiler-sfc: ^3.2.39 => 3.2.39 
    @vue/compiler-ssr:  3.2.39 
    @vue/component-compiler-utils:  3.3.0 
    @vue/devtools-api:  6.2.0 (6.2.1)
    @vue/reactivity:  3.2.39 
    @vue/reactivity-transform:  3.2.39 
    @vue/runtime-core:  3.2.39 
    @vue/runtime-dom:  3.2.39 
    @vue/server-renderer:  3.2.39 
    @vue/shared:  3.2.39 
    @vue/web-component-wrapper:  1.3.0 
    eslint-plugin-vue: ^8.7.1 => 8.7.1 
    vue: ^3.2.39 => 3.2.39 
    vue-eslint-parser:  8.3.0 
    vue-hot-reload-api:  2.3.4 
    vue-i18n: ^9.2.2 => 9.2.2 
    vue-input-autowidth: ^1.0.11 => 1.0.11 
    vue-loader:  17.0.0 (15.10.0)
    vue-router: ^4.1.5 => 4.1.5 
    vue-style-loader:  4.1.3 
    vue-template-es2015-compiler:  1.9.1 
    vuedraggable: ^4.1.0 => 4.1.0 
    vuex: ^4.0.2 => 4.0.2 

Steps to reproduce

Enabling test_workers on nightwatch.conf.js file and running script:

npm test:e2e

package.json
"test:e2e": "vue-cli-service test:e2e"

nightwatch.conf.js

...
default: {
  test_workers: true,
  desiredCapabilities: {
      browserName: 'chrome',
      'goog:chromeOptions': {
          args: ["--headless" ],
          w3c: false
      }
  }
  },
...

What is expected?

Several running tests workers should run without any connection issues to ChromeDriver (with same major version as Chrome).

INFO  Running end-to-end tests ...
Launching up to 8 concurrent test worker processes...
Starting ChromeDriver on auto-generated port...                                
ℹ Connected to ChromeDriver on port undefined (1168ms).  
...

What is actually happening?

All of the workers are unable to connect to ChromeDriver.

INFO  Running end-to-end tests ...
Launching up to 8 concurrent test worker processes...
...
⚠ Failed to connect to ChromeDriver on localhost with port 9515.

---

This started to happen after updating @vue/cli-plugin-e2e-nightwatch from v4 to v5.0.8 (Nightwatch updated from v1 to v2).
This package has Nightwatch as dependency with version 2.0.5 (current -> 2.3.7).
In the Nightwatch version 2.2.3 was fixed the following issue.