add code coverage

.gitignore

@@ -12,6 +12,7 @@
 /.sass-cache
 /connect.lock
 /coverage/*
+!/coverage/coverage-summary.json
 /libpeerconnection.log
 npm-debug.log*
 yarn-error.log

coverage/coverage-summary.json

@@ -0,0 +1,4 @@
+{
+"total":{"lines":{"total":6,"covered":6,"skipped":0,"pct":100},"statements":{"total":6,"covered":6,"skipped":0,"pct":100},"functions":{"total":3,"covered":3,"skipped":0,"pct":100},"branches":{"total":2,"covered":2,"skipped":0,"pct":100},"linesCovered":{"1":1,"2":5,"3":10,"4":8,"5":4,"7":4}},
+"tests/dummy/app/resolver.js":{"lines":{"total":0,"covered":0,"skipped":0,"pct":100},"statements":{"total":0,"covered":0,"skipped":0,"pct":100},"functions":{"total":0,"covered":0,"skipped":0,"pct":100},"branches":{"total":0,"covered":0,"skipped":0,"pct":100},"linesCovered":{}},
+"addon/validators/sometimes.js":{"lines":{"total":6,"covered":6,"skipped":0,"pct":100},"statements":{"total":6,"covered":6,"skipped":0,"pct":100},"functions":{"total":3,"covered":3,"skipped":0,"pct":100},"branches":{"total":2,"covered":2,"skipped":0,"pct":100},"linesCovered":{"1":1,"2":5,"3":10,"4":8,"5":4,"7":4}}}

package.json

@@ -22,7 +22,8 @@
   "scripts": {
     "build": "ember build",
     "start": "ember server",
-    "test": "ember try:each"
+    "test": "ember try:each",
+    "test-with-coverage": "COVERAGE=true ember test -s"
   },
   "dependencies": {
     "ember-cli-babel": "^6.3.0"
@@ -33,6 +34,7 @@
     "ember-changeset": "^1.3.0",
     "ember-changeset-validations": "^1.2.8",
     "ember-cli": "~2.15.1",
+    "ember-cli-code-coverage": "^0.4.2",
     "ember-cli-dependency-checker": "^2.0.0",
     "ember-cli-eslint": "^3.0.0",
     "ember-cli-htmlbars": "^2.0.1",