allow parallel envs with cucumber

lib/runner/cli/cli.js

@@ -293,7 +293,7 @@ class CliRunner {
 
       if (plugins.length > 0) {
         plugins.forEach((plugin) => {
-          if (plugin.globals && Utils.isFunction(plugin.globals.registerEventHandlers)){
+          if (plugin.globals && Utils.isFunction(plugin.globals.registerEventHandlers)) {
             plugin.globals.registerEventHandlers(NightwatchEventHub);
           }
         });
@@ -450,7 +450,11 @@ class CliRunner {
   }
 
   isTestWorkersEnabled() {
-    const testWorkers =  this.test_settings.testWorkersEnabled && !singleSourceFile(this.argv);
+    if (this.testRunner.supportsParallelTestSuiteRun === false) {
+      return false;
+    }
+
+    const testWorkers = this.test_settings.testWorkersEnabled && !singleSourceFile(this.argv);
     if (!testWorkers) {
 
       if (this.argv.debug) {
@@ -466,7 +470,7 @@ class CliRunner {
 
       if (isMobile(desiredCapabilities) && !this.usingServer(this.testEnvSettings[env])) {
 
-        if  (Concurrency.isWorker()) {
+        if (Concurrency.isWorker()) {
           Logger.info('Disabling parallelism while running tests on mobile platform');
         }
 

lib/runner/test-runners/cucumber.js

@@ -246,6 +246,10 @@ class CucumberSuite extends TestSuite {
 
 class CucumberRunnner extends Runner {
   get supportsConcurrency() {
+    return true;
+  }
+
+  get supportsParallelTestSuiteRun() {
     return false;
   }
 

test/cucumber-integration-tests/testCucumberTestsInParallel.js

@@ -5,17 +5,17 @@ const commandMocks = require('../lib/command-mocks.js');
 const common = require('../common.js');
 const MockServer = require('../lib/mockserver.js');
 
-describe('Cucumber integration - parallel running single formatter', function() {
-  beforeEach(function(done) {
+describe('Cucumber integration - parallel running single formatter', function () {
+  beforeEach(function (done) {
     this.server = MockServer.init(null, {port: 10190});
     this.server.on('listening', () => done());
   });
 
-  afterEach(function(done) {
+  afterEach(function (done) {
     Globals.afterEach.call(this, done);
   });
 
-  it('testCucumberSampleTests in parallel with single formatter', function() {
+  it('testCucumberSampleTests in parallel with single formatter', function () {
     const source = [
       path.join(__dirname, './sample_cucumber_tests/parallel/testSample.js')
     ];
@@ -41,7 +41,7 @@ describe('Cucumber integration - parallel running single formatter', function()
       });
   });
 
-  it('testCucumberSampleTests in parallel with multiple step definition files', function() {
+  it('testCucumberSampleTests in parallel with multiple step definition files', function () {
 
     commandMocks.elementText('5cc459b8-36a8-3042-8b4a-258883ea642b', 'xx');
 
@@ -56,6 +56,7 @@ describe('Cucumber integration - parallel running single formatter', function()
       parallel: true,
       verbose: true,
       timeout: 10,
+      env: 'chrome',
       silent: false,
       tags: ['not @fail'],
       format: 'progress',
@@ -71,4 +72,36 @@ describe('Cucumber integration - parallel running single formatter', function()
         assert.strictEqual(errorOrFailed, false);
       });
   });
-});
+
+  it('testCucumberSampleTests in parallel environments with multiple step definition files', function () {
+
+    commandMocks.elementText('5cc459b8-36a8-3042-8b4a-258883ea642b', 'xx');
+
+    const source = [
+      path.join(__dirname, './sample_cucumber_tests/parallelWithMultipleDefinition')
+    ];
+
+    const {runTests} = common.require('index.js');
+
+    return runTests({
+      source,
+      parallel: true,
+      verbose: true,
+      timeout: 10,
+      env: 'chrome,firefox',
+      silent: false,
+      tags: ['not @fail'],
+      format: 'progress',
+      config: path.join(__dirname, '../extra/cucumber-config-parallel.js'),
+      'format-options': '',
+      ['retry-interval']: 5,
+      ['persist-globals']: true,
+      ['webdriver-host']: 'localhost',
+      ['start-process']: false,
+      ['webdriver-port']: 10190
+    }, {})
+      .then(errorOrFailed => {
+        assert.strictEqual(errorOrFailed, false);
+      });
+  });
+});

test/extra/cucumber-config-parallel.js

@@ -26,6 +26,19 @@ module.exports = {
       feature_path: path.join(__dirname, '../cucumber-integration-tests/sample_cucumber_tests/parallel/sample.feature')
     }
   },
+
+  test_settings: {
+    chrome: {
+      desiredCapabilities: {
+        browserName: 'chrome'
+      }
+    },
+    firefox: {
+      desiredCapabilities: {
+        browserName: 'firefox'
+      }
+    }
+  },
   output: false,
   silent: false
-}
+};