add assertions

karma.conf.js

@@ -1,7 +1,7 @@
 module.exports = config => {
   config.set({
     basePath: '',
-    frameworks: ['mocha'],
+    frameworks: ['mocha', 'chai'],
     files: [
       'src/**/*.test.js',
     ],

package.json

@@ -9,12 +9,14 @@
     "babel-preset-es2015": "6.13.2",
     "babel-preset-es2016": "6.11.3",
     "babel-preset-stage-2": "6.13.0",
+    "chai": "3.5.0",
     "css-loader": "0.23.1",
     "eslint": "3.2.2",
     "eslint-config-kentcdodds": "^9.0.0",
     "ghooks": "1.3.2",
     "http-server": "0.9.0",
     "karma": "1.1.2",
+    "karma-chai": "0.1.0",
     "karma-chrome-launcher": "1.0.1",
     "karma-mocha": "1.1.1",
     "mocha": "3.0.1",

src/controller.test.js

@@ -1,8 +1,8 @@
 describe('test', () => {
   it('works', () => {
-    // test stuff
+    expect(true).to.be.true
   })
   it('works again', () => {
-    // other stuff
+    expect('hi').to.equal('hi')
   })
 })