misc: configure test environment and code coverage

Add code coverage reporting (console, HTML), prepare Travis CI config file for Codecov integration, update Node.js version used by Travis CI.

.gitignore

@@ -1,6 +1,11 @@
 .DS_Store
+
 node_modules
 npm-debug.log
+
+.nyc_output
+coverage
+
 example/build
 dist
 lib

.travis.yml

@@ -1,4 +1,5 @@
 language: node_js
 node_js:
-  - "5.1.0"
-script: npm run test
+  - "6.2.0"
+script: npm run test:production
+after_success: npm run coverage:production

package.json

@@ -5,14 +5,30 @@
   "main": "lib/index.js",
   "scripts": {
     "lint": "$(npm bin)/eslint src",
-    "test": "npm run lint",
+    "test": "NODE_ENV=development npm run lint && npm run spec",
+    "test:production": "NODE_ENV=production npm run lint && npm run spec",
+    "spec": "NODE_PATH=src nyc --all --silent --require babel-core/register mocha --plugins transform-inline-environment-variables --recursive spec/*.spec.js",
+    "spec:watch": "NODE_ENV=development npm run spec -- --watch",
+    "coverage": "nyc report",
+    "coverage:html": "nyc report --reporter=html && (http-server -p 8077 ./coverage & open-url http://localhost:8077/)",
+    "coverage:production": "nyc report --reporter=text-lcov > coverage.lcov && codecov",
     "clean": "$(npm bin)/rimraf dist lib",
     "build:lib": "$(npm bin)/babel src --out-dir lib",
     "build:umd": "LIBRARY_NAME=reduxLogger NODE_ENV=development $(npm bin)/webpack src/index.js dist/index.js --config webpack.build.js",
     "build:umd:min": "LIBRARY_NAME=reduxLogger NODE_ENV=production $(npm bin)/webpack -p src/index.js dist/index.min.js --config webpack.build.js",
     "build": "npm run build:lib && npm run build:umd && npm run build:umd:min",
     "prepublish": "npm run clean && npm run test && npm run build"
   },
+  "nyc": {
+    "exclude": [
+      "node_modules",
+      "spec",
+      "example",
+      "lib",
+      "dist",
+      "webpack.*.js"
+    ]
+  },
   "files": [
     "dist",
     "lib",
@@ -42,11 +58,18 @@
     "babel-eslint": "6.0.4",
     "babel-loader": "6.2.0",
     "babel-plugin-add-module-exports": "0.1.1",
+    "babel-plugin-transform-inline-environment-variables": "6.3.13",
     "babel-preset-es2015": "6.3.13",
     "babel-preset-react": "6.3.13",
     "babel-preset-stage-0": "6.3.13",
+    "chai": "3.5.0",
+    "codecov": "1.0.1",
     "eslint": "2.10.2",
     "eslint-plugin-react": "5.1.1",
+    "http-server": "0.9.0",
+    "mocha": "2.4.5",
+    "nyc": "6.4.4",
+    "open-url": "2.0.2",
     "rimraf": "2.4.4",
     "webpack": "1.12.9"
   },

spec/index.spec.js

@@ -0,0 +1,11 @@
+import { expect } from 'chai';
+
+import { repeat } from 'helpers';
+
+context(`Helpers`, () => {
+  describe(`'repeat'`, () => {
+    it(`should repeat a string the number of indicated times`, () => {
+      expect(repeat(`teacher`, 3)).to.equal(`teacherteacherteacher`);
+    });
+  });
+});

src/helpers.js

@@ -1,6 +1,6 @@
-const repeat = (str, times) => (new Array(times + 1)).join(str);
+export const repeat = (str, times) => (new Array(times + 1)).join(str);
 
-const pad = (num, maxLength) => repeat(`0`, maxLength - num.toString().length) + num;
+export const pad = (num, maxLength) => repeat(`0`, maxLength - num.toString().length) + num;
 
 export const formatTime = (time) => `${pad(time.getHours(), 2)}:${pad(time.getMinutes(), 2)}:${pad(time.getSeconds(), 2)}.${pad(time.getMilliseconds(), 3)}`;