Add unit test

Author: Johann-S

lib/__tests__/index.js

@@ -0,0 +1,20 @@
+const babel = require('babel-core')
+const plugin = require('../index.js')
+const options = {
+  presets: [
+    ["es2015", {
+      "modules": false
+    }]
+  ],
+  plugins: [plugin]
+}
+
+it('Imports stripped', () => {
+  var example = `
+    import fs from 'fs'
+    import path from 'path'
+  `
+
+  const {code} = babel.transform(example, options)
+  expect(code.length).toBe(0)
+})

package.json

@@ -20,5 +20,13 @@
   "repository": {
     "type": "git",
     "url": "https://github.com/bardiharborow/babel-plugin-transform-es2015-modules-strip.git"
+  },
+  "scripts": {
+    "test": "jest"
+  },
+  "devDependencies": {
+    "babel-core": "^6.25.0",
+    "babel-preset-es2015": "^6.24.1",
+    "jest": "^20.0.4"
   }
 }