CI: added code coverage

.gitignore

@@ -7,3 +7,7 @@ npm-debug.log*
 node_modules
 .npm
 .yarn-integrity
+
+# Coverage reports
+coverage
+.nyc_output

.nycrc

@@ -0,0 +1,8 @@
+{
+	"exclude": [
+		"tests"
+	],
+	"reporter": [
+		"text-summary"
+	]
+}

.travis.yml

@@ -8,4 +8,6 @@ before_script: yarn run lint
 script:
   - yarn run test
   - yarn run build
+after_success: yarn run coverage
+
 cache: yarn

README.md

@@ -1,6 +1,7 @@
 # ![Naja.js](doc/naja_type.png)
 
 [![Build Status](https://img.shields.io/travis/jiripudil/Naja.svg)](https://travis-ci.org/jiripudil/Naja)
+[![Code Coverage](https://img.shields.io/codecov/c/github/jiripudil/Naja.svg)](https://codecov.io/gh/jiripudil/Naja)
 [![npm version](https://img.shields.io/npm/v/naja.svg)](https://npmjs.com/package/naja)
 [![npm monthly downloads](https://img.shields.io/npm/dm/naja.svg)](https://npmjs.com/package/naja)
 [![npm downloads](https://img.shields.io/npm/dt/naja.svg)](https://npmjs.com/package/naja)

package.json

@@ -26,18 +26,21 @@
     "babel-preset-es2015": "^6.16.0",
     "babel-register": "^6.16.3",
     "chai": "^3.5.0",
+    "codecov": "^2.1.0",
     "eslint": "^3.15.0",
     "jsdom": "^9.9.1",
     "jsdom-global": "^2.1.1",
     "mocha": "^3.1.2",
+    "nyc": "^10.1.2",
     "path": "^0.12.0",
     "sinon": "^1.17.6",
     "webpack": "^2.2.1",
     "webpack-dev-server": "^1.15.0"
   },
   "scripts": {
     "build": "NODE_ENV=production webpack --config webpack.config.js",
-    "test": "mocha --require babel-register tests",
+    "test": "nyc mocha --require babel-register tests",
+    "coverage": "nyc report --reporter=text-lcov > coverage.lcov && codecov",
     "lint": "node_modules/.bin/eslint src"
   },
   "repository": {