install deps and karma init

karma.conf.js

@@ -0,0 +1,17 @@
+module.exports = config => {
+  config.set({
+    basePath: '',
+    frameworks: ['mocha'],
+    files: [
+      'src/**/*.test.js',
+    ],
+    reporters: ['progress'],
+    port: 9876,
+    colors: true,
+    logLevel: config.LOG_INFO,
+    autoWatch: false,
+    browsers: ['Chrome'],
+    singleRun: true,
+    concurrency: Infinity,
+  })
+}

package.json

@@ -14,6 +14,10 @@
     "eslint-config-kentcdodds": "^9.0.0",
     "ghooks": "1.3.2",
     "http-server": "0.9.0",
+    "karma": "1.1.2",
+    "karma-chrome-launcher": "1.0.1",
+    "karma-mocha": "1.1.1",
+    "mocha": "3.0.1",
     "npm-run-all": "2.3.0",
     "opt-cli": "1.5.1",
     "rimraf": "2.5.4",
@@ -38,7 +42,9 @@
     "debug": "node-nightly --inspect --debug-brk node_modules/.bin/webpack --env.debug",
     "debug:dev": "npm run debug -- --env.dev",
     "debug:prod": "npm run debug -- --env.prod",
-    "validate": "npm-run-all --parallel lint build",
+    "test": "karma start",
+    "watch:test": "npm test -- --auto-watch --no-single-run",
+    "validate": "npm-run-all --parallel lint build test",
     "lint": "eslint ."
   }
 }

src/controller.test.js

@@ -0,0 +1,8 @@
+describe('test', () => {
+  it('works', () => {
+    // test stuff
+  })
+  it('works again', () => {
+    // other stuff
+  })
+})