try add test file

package.json

@@ -7,7 +7,7 @@
   "scripts": {
     "dev": "cross-env NODE_ENV=development rollup -c -m -w",
     "build": "cross-env NODE_ENV=production rollup -c",
-    "test": "cross-env NODE_ENV=test test"
+    "test": "cross-env NODE_ENV=test ava"
   },
   "repository": {
     "type": "git",
@@ -28,9 +28,12 @@
     "@babel/plugin-external-helpers": "^7.0.0",
     "@babel/plugin-transform-runtime": "^7.1.0",
     "@babel/preset-env": "^7.1.0",
+    "@babel/register": "^7.0.0",
     "@babel/runtime": "^7.1.2",
-    "babel-core": "^7.0.0-bridge.0",
     "autoprefixer": "^9.3.1",
+    "ava": "1.0.0-rc.1",
+    "babel-core": "^7.0.0-bridge.0",
+    "browser-env": "^3.2.5",
     "cross-env": "^5.2.0",
     "cssnano": "^4.1.7",
     "node-sass": "^4.9.4",
@@ -50,5 +53,11 @@
     "option-validator": "^1.1.0",
     "screenfull": "^3.3.3",
     "tiny-emitter": "^2.0.2"
+  },
+  "ava": {
+    "require": [
+      "./test/helpers/register.js",
+      "./test/helpers/setup-browser-env.js"
+    ]
   }
 }