Upgrade to babel 6, migrate tests to ava

.babelrc

@@ -0,0 +1,3 @@
+{
+  "presets": ["es2015", "stage-2"]
+}

.gitignore

@@ -1,2 +1,4 @@
 node_modules
 coverage
+.nyc_output
+

.travis.yml

@@ -15,7 +15,7 @@ before_install:
 before_script:
   - npm prune
 script:
-  - npm run test:single
+  - npm run test:cover
   - npm run check-coverage
   - npm run build
 after_success:

package.json

@@ -8,11 +8,12 @@
     "build": "babel src/index.js -o dist/index.js",
     "postbuild": "cp src/starwars-names.json dist/starwars-names.json",
     "commit": "git-cz",
-    "check-coverage": "istanbul check-coverage --statements 100 --branches 100 --functions 100 --lines 100",
-    "report-coverage": "cat ./coverage/lcov.info | codecov",
+    "check-coverage": "nyc check-coverage --statements 100 --branches 100 --functions 100 --lines 100",
+    "report-coverage": "nyc report --reporter=text-lcov | codecov",
     "start": "npm run test",
-    "test": "mocha src/index.test.js -w --compilers js:babel/register",
-    "test:single": "istanbul cover -x *.test.js _mocha -- -R spec src/index.test.js --compilers js:babel/register",
+    "test": "ava src/**/*.test.js --require babel-register",
+    "test:watch": "nodemon -w src --exec 'npm t -- --verbose'",
+    "test:cover": "nyc --reporter=lcov --reporter=text npm t",
     "semantic-release": "semantic-release pre && npm publish && semantic-release post"
   },
   "repository": {
@@ -34,22 +35,27 @@
     "unique-random-array": "1.0.0"
   },
   "devDependencies": {
-    "babel": "5.8.21",
-    "chai": "3.3.0",
+    "ava": "0.9.1",
+    "babel-cli": "6.3.17",
+    "babel-core": "6.3.26",
+    "babel-preset-es2015": "6.3.13",
+    "babel-preset-stage-2": "6.3.13",
+    "babel-register": "6.3.13",
     "codecov.io": "0.1.6",
     "commitizen": "1.0.5",
     "cz-conventional-changelog": "1.1.2",
     "ghooks": "0.3.2",
-    "istanbul": "0.3.21",
-    "mocha": "2.2.5",
+    "is_js": "0.7.6",
+    "nodemon": "1.8.1",
+    "nyc": "5.3.0",
     "semantic-release": "4.3.5"
   },
   "czConfig": {
     "path": "node_modules/cz-conventional-changelog"
   },
   "config": {
     "ghooks": {
-      "pre-commit": "npm run test:single && npm run check-coverage"
+      "pre-commit": "npm run test && npm run check-coverage"
     }
   }
 }

src/index.test.js

@@ -1,35 +1,30 @@
-import {expect} from 'chai';
-import starWars from './index';
+import starWars from './index'
+import test from 'ava'
+import is from 'is_js'
 
-describe('starwars-names', function() {
-  describe('all', function() {
-    it('should be an array of strings', function() {
-      expect(starWars.all).to.satisfy(isArrayOfStrings);
+test('all is an array of strings', t => {
+  t.true(
+    starWars.all.every(item => typeof item === 'string')
+  )
+})
 
-      function isArrayOfStrings(array) {
-        return array.every(function(item) {
-          return typeof item === 'string';
-        });
-      }
-    });
+test(`all should contain 'Luke Skywalker'`, t => {
+  t.true(
+    is.inArray('Luke Skywalker', starWars.all)
+  )
+})
 
-    it('should contain `Luke Skywalker`', function() {
-      expect(starWars.all).to.include('Luke Skywalker');
-    });
-  });
+test('random should return a random item from the starWars.all', t => {
+  t.true(
+    is.inArray(starWars.random(), starWars.all)
+  )
+})
 
-  describe('random', function() {
-    it('should return a random item from the starWars.all', function() {
-      var randomItem = starWars.random();
-      expect(starWars.all).to.include(randomItem);
-    });
+test('random should return an array of random items when passed a number', t => {
+  const items = starWars.random(3)
+  t.true(items.length === 3)
+  t.true(
+    items.every(item => is.inArray(item, starWars.all))
+  )
+})
 
-    it('should return an array of random items if passed a number', function() {
-      var randomItems = starWars.random(3);
-      expect(randomItems).to.have.length(3);
-      randomItems.forEach(function(item) {
-        expect(starWars.all).to.include(item);
-      });
-    });
-  });
-});