Basic skeleton

test/e2e/custom-assertions/elementCount.js

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+// A custom Nightwatch assertion.
+// the name of the method is the filename.
+// can be used in tests like this:
+//
+//   browser.assert.elementCount(selector, count)
+//
+// for how to write custom assertions see
+// http://nightwatchjs.org/guide#writing-custom-assertions
+exports.assertion = function (selector, count) {
+  this.message = 'Testing if element <' + selector + '> has count: ' + count
+  this.expected = count
+  this.pass = function (val) {
+    return val === this.expected
+  }
+  this.value = function (res) {
+    return res.value
+  }
+  this.command = function (cb) {
+    var self = this
+    return this.api.execute(function (selector) {
+      return document.querySelectorAll(selector).length
+    }, [selector], function (res) {
+      cb.call(self, res)
+    })
+  }
+}

test/e2e/nightwatch.conf.js

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+require('babel-register')
+var config = require('../../config')
+
+// http://nightwatchjs.org/guide#settings-file
+module.exports = {
+  "src_folders": ["test/e2e/specs"],
+  "output_folder": "test/e2e/reports",
+  "custom_assertions_path": ["test/e2e/custom-assertions"],
+
+  "selenium": {
+    "start_process": true,
+    "server_path": "node_modules/selenium-server/lib/runner/selenium-server-standalone-2.53.1.jar",
+    "host": "127.0.0.1",
+    "port": 4444,
+    "cli_args": {
+      "webdriver.chrome.driver": require('chromedriver').path
+    }
+  },
+
+  "test_settings": {
+    "default": {
+      "selenium_port": 4444,
+      "selenium_host": "localhost",
+      "silent": true,
+      "globals": {
+        "devServerURL": "http://localhost:" + (process.env.PORT || config.dev.port)
+      }
+    },
+
+    "chrome": {
+      "desiredCapabilities": {
+        "browserName": "chrome",
+        "javascriptEnabled": true,
+        "acceptSslCerts": true
+      }
+    },
+
+    "firefox": {
+      "desiredCapabilities": {
+        "browserName": "firefox",
+        "javascriptEnabled": true,
+        "acceptSslCerts": true
+      }
+    }
+  }
+}

test/e2e/runner.js

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+// 1. start the dev server using production config
+process.env.NODE_ENV = 'testing'
+var server = require('../../build/dev-server.js')
+
+// 2. run the nightwatch test suite against it
+// to run in additional browsers:
+//    1. add an entry in test/e2e/nightwatch.conf.json under "test_settings"
+//    2. add it to the --env flag below
+// or override the environment flag, for example: `npm run e2e -- --env chrome,firefox`
+// For more information on Nightwatch's config file, see
+// http://nightwatchjs.org/guide#settings-file
+var opts = process.argv.slice(2)
+if (opts.indexOf('--config') === -1) {
+  opts = opts.concat(['--config', 'test/e2e/nightwatch.conf.js'])
+}
+if (opts.indexOf('--env') === -1) {
+  opts = opts.concat(['--env', 'chrome'])
+}
+
+var spawn = require('cross-spawn')
+var runner = spawn('./node_modules/.bin/nightwatch', opts, { stdio: 'inherit' })
+
+runner.on('exit', function (code) {
+  server.close()
+  process.exit(code)
+})
+
+runner.on('error', function (err) {
+  server.close()
+  throw err
+})

test/e2e/specs/test.js

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+// For authoring Nightwatch tests, see
+// http://nightwatchjs.org/guide#usage
+
+module.exports = {
+  'default e2e tests': function (browser) {
+    // automatically uses dev Server port from /config.index.js
+    // default: http://localhost:8080
+    // see nightwatch.conf.js
+    const devServer = browser.globals.devServerURL
+
+    browser
+      .url(devServer)
+      .waitForElementVisible('#app', 5000)
+      .assert.elementPresent('.hello')
+      .assert.containsText('h1', 'Welcome to Your Vue.js App')
+      .assert.elementCount('img', 1)
+      .end()
+  }
+}