chore(infrastructure): Set up continuous integration

* Add .travis.yml file to the repo, enabling TravisCI to run against PRs
  for master and branches of.
* Set up Sauce Labs running on the last two versions of every major
  browser (excluding Android 4 and Opera). Android 4 is quite old, and
  Opera is very similar to Chrome as it uses blink/chromium under the
  hood.
* Work around [SauceLabs PR restriction](https://docs.travis-ci.com/user/pull-requests#Pull-Requests-and-Security-Restrictions) by falling back to running
  tests on Chrome and FF latest only when PR comes from a repo fork. SL
  Tests are then run when the PR gets merged to master.
* Fix false negative in IE11 for mdl-auto-init test.

Part of #4464

.travis.yml

@@ -0,0 +1,26 @@
+sudo: required
+dist: trusty
+language: node_js
+node_js:
+  - node # stable
+  - '4' # LTS
+branches:
+  only:
+    - master
+before_install:
+  - '[ -n "$SAUCE_ACCESS_KEY" ] || echo "NON-SECURE BUILD. Falling back to Chrome + FF only.'
+  - '[ -n "$SAUCE_ACCESS_KEY" ] || export CHROME_BIN=/usr/bin/google-chrome'
+  - '[ -n "$SAUCE_ACCESS_KEY" ] || export DISPLAY=:99.0'
+  - '[ -n "$SAUCE_ACCESS_KEY" ] || sh -e /etc/init.d/xvfb start'
+  - '[ -n "$SAUCE_ACCESS_KEY" ] || sudo apt-get update'
+  - '[ -n "$SAUCE_ACCESS_KEY" ] || sudo apt-get install -y libappindicator1 fonts-liberation'
+  - '[ -n "$SAUCE_ACCESS_KEY" ] || wget https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb'
+  - '[ -n "$SAUCE_ACCESS_KEY" ] || sudo dpkg -i google-chrome*.deb'
+env:
+  global:
+    - SAUCE_USERNAME=material-sauce
+    -
+      secure: 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
+addons:
+  firefox: latest
+  sauce_connect: true

karma.conf.js

@@ -1,6 +1,85 @@
 const path = require('path');
 const webpackConfig = require('./webpack.config')[0];
 
+const USING_TRAVISCI = Boolean(process.env.TRAVIS);
+const USING_SL = Boolean(process.env.SAUCE_USERNAME && process.env.SAUCE_ACCESS_KEY);
+
+const SL_LAUNCHERS = {
+  'sl-chrome-stable': {
+    base: 'SauceLabs',
+    browserName: 'chrome',
+    version: '51'
+  },
+  'sl-chrome-beta': {
+    base: 'SauceLabs',
+    browserName: 'chrome',
+    version: 'beta'
+  },
+  'sl-chrome-previous': {
+    base: 'SauceLabs',
+    browserName: 'chrome',
+    version: '50'
+  },
+  'sl-firefox-stable': {
+    base: 'SauceLabs',
+    browserName: 'firefox'
+  },
+  'sl-firefox-previous': {
+    base: 'SauceLabs',
+    browserName: 'firefox',
+    version: '47'
+  },
+  // NOTE(traviskaufman): Tried adding Firefox beta but it was consistently flaky. Holding off on adding
+  // it in for now. If it proves to be less flaky in the future, we should add it.
+  'sl-safari-stable': {
+    base: 'SauceLabs',
+    browserName: 'safari',
+    version: '9',
+    platform: 'OS X 10.11'
+  },
+  'sl-safari-previous': {
+    base: 'SauceLabs',
+    browserName: 'safari',
+    version: '8',
+    platform: 'OS X 10.10'
+  },
+  'sl-ie': {
+    base: 'SauceLabs',
+    browserName: 'internet explorer',
+    version: '11',
+    platform: 'Windows 8.1'
+  },
+  'sl-edge': {
+    base: 'SauceLabs',
+    browserName: 'microsoftedge',
+    version: '13',
+    platform: 'Windows 10'
+  },
+  'sl-android-stable': {
+    base: 'SauceLabs',
+    browserName: 'android',
+    version: '5.0'
+  },
+  'sl-ios-safari-latest': {
+    base: 'SauceLabs',
+    browserName: 'iphone',
+    platform: 'OS X 10.10',
+    version: '9.1'
+  },
+  'sl-ios-safari-previous': {
+    base: 'SauceLabs',
+    browserName: 'iphone',
+    version: '8.4'
+  }
+};
+
+const TRAVISCI_FALLBACK_LAUNCHERS = {
+  'travisci-chrome': {
+    base: 'Chrome',
+    flags: ['--no-sandbox']
+  }
+};
+
 module.exports = function(config) {
   config.set({
     basePath: '',
@@ -15,8 +94,12 @@ module.exports = function(config) {
     port: 9876,
     colors: true,
     logLevel: config.LOG_INFO,
-    browsers: ['Chrome'],
+    browsers: getBrowsers(),
+    browserDisconnectTimeout: 20000,
+    browserNoActivityTimeout: 240000,
+    captureTimeout: 120000,
     concurrency: Infinity,
+    customLaunchers: USING_SL ? SL_LAUNCHERS : TRAVISCI_FALLBACK_LAUNCHERS,
 
     coverageReporter: {
       dir: 'coverage',
@@ -47,3 +130,10 @@ module.exports = function(config) {
     }
   });
 };
+
+function getBrowsers() {
+  if (USING_SL) {
+    return Object.keys(SL_LAUNCHERS);
+  }
+  return USING_TRAVISCI ? Object.keys(TRAVISCI_FALLBACK_LAUNCHERS).concat(['Firefox']) : ['Chrome'];
+}

package.json

@@ -38,6 +38,8 @@
     "karma": "^1.1.1",
     "karma-chrome-launcher": "^1.0.1",
     "karma-coverage": "^1.1.0",
+    "karma-firefox-launcher": "^1.0.0",
+    "karma-sauce-launcher": "^1.0.0",
     "karma-sourcemap-loader": "^0.3.7",
     "karma-tap": "^2.0.1",
     "karma-webpack": "^1.7.0",

test/unit/mdl-auto-init/mdl-auto-init.test.js

@@ -21,7 +21,7 @@ const createFixture = () => bel`
 
 const setupTest = () => {
   mdlAutoInit.deregisterAll();
-  mdlAutoInit.register(FakeComponent.name, FakeComponent);
+  mdlAutoInit.register('FakeComponent', FakeComponent);
   return createFixture();
 };