IE11 testing in CI via sauce labs

.eslintrc.js

@@ -23,6 +23,7 @@ module.exports = {
         '.template-lintrc.js',
         'ember-cli-build.js',
         'index.js',
+        'testem.ie11.js',
         'testem.js',
         'blueprints/*/index.js',
         'config/**/*.js',

.travis.yml

@@ -19,6 +19,7 @@ env:
     - JOBS=1
 
 stages:
+  - wip
   - 'Tests'
   - 'Additional Tests'
   - 'Canary Tests'
@@ -32,6 +33,15 @@ jobs:
 
   include:
     # runs linting and tests with current locked deps
+    - stage: 'wip'
+      name: 'Internet Explorer 11'
+      before_script:
+        - rm testem.js
+        - cp testem.ie11.js testem.js
+        - ember sauce:connect
+      script: ember test --test-port 7000
+      after_script:
+        - ember sauce:disconnect
 
     - stage: 'Tests'
       name: 'Tests'

package.json

@@ -29,6 +29,7 @@
     "ember-cli-htmlbars-inline-precompile": "2.1.0",
     "ember-cli-inject-live-reload": "2.0.1",
     "ember-cli-release": "1.0.0-beta.2",
+    "ember-cli-sauce": "^2.2.0",
     "ember-cli-template-lint": "1.0.0-beta.2",
     "ember-cli-test-loader": "2.2.0",
     "ember-cli-uglify": "2.1.0",

testem.ie11.js

@@ -0,0 +1,26 @@
+module.exports = {
+  test_page: 'tests/index.html?hidepassed',
+  disable_watching: true,
+
+  launch_in_ci: ['SL_Internet_Explorer_11_public'],
+
+  launch_in_dev: ['SL_Internet_Explorer_11_public'],
+
+  launchers: {
+    SL_Internet_Explorer_11_public: {
+      exe: 'ember',
+      args: [
+        'sauce:launch',
+        '---',
+        '-b',
+        'internet explorer',
+        '--visibility',
+        'public',
+        '--attach',
+        '--no-connect',
+        '--url'
+      ],
+      protocol: 'browser'
+    }
+  }
+};

testem.js

@@ -1,12 +1,11 @@
 module.exports = {
   test_page: 'tests/index.html?hidepassed',
   disable_watching: true,
-  launch_in_ci: [
-    'Chrome'
-  ],
-  launch_in_dev: [
-    'Chrome'
-  ],
+
+  launch_in_ci: ['Chrome'],
+
+  launch_in_dev: ['Chrome'],
+
   browser_args: {
     Chrome: {
       ci: [