add test and update webpack config

[new] add test config
[new] add breadcrumb test
[change] update package.json
[new] util.js copied from  element
[unresolved] see test/unit/index.js @todo

package.json

@@ -25,7 +25,8 @@
     "dist:prod": "webpack --config build/webpack.dist.prod.config.js",
     "dist": "npm run dist:style && npm run dist:dev && npm run dist:prod",
     "lint": "eslint --fix --ext .js,.vue src",
-    "test": "npm run dist && npm run lint",
+    "unit": "cross-env BABEL_ENV=test karma start test/unit/karma.conf.js --single-run",
+    "test": "npm run unit",
     "prepublish": "npm run dist"
   },
   "repository": {
@@ -54,11 +55,14 @@
     "babel-plugin-transform-runtime": "^6.12.0",
     "babel-preset-es2015": "^6.9.0",
     "babel-runtime": "^6.11.6",
+    "chai": "^3.5.0",
+    "cross-env": "^3.1.4",
     "css-loader": "^0.23.1",
     "eslint": "^3.12.2",
     "eslint-plugin-html": "^1.7.0",
     "extract-text-webpack-plugin": "^2.0.0",
     "file-loader": "^0.8.5",
+    "friendly-errors-webpack-plugin": "^1.6.1",
     "gulp": "^3.9.1",
     "gulp-autoprefixer": "^3.1.1",
     "gulp-clean-css": "^2.0.13",
@@ -66,8 +70,21 @@
     "gulp-rename": "^1.2.2",
     "html-loader": "^0.3.0",
     "html-webpack-plugin": "^2.28.0",
+    "karma": "^1.4.1",
+    "karma-coverage": "^1.1.1",
+    "karma-mocha": "^1.3.0",
+    "karma-phantomjs-launcher": "^1.0.2",
+    "karma-sinon-chai": "^1.2.4",
+    "karma-sourcemap-loader": "^0.3.7",
+    "karma-spec-reporter": "0.0.26",
+    "karma-webpack": "^2.0.2",
     "less": "^2.7.1",
     "less-loader": "^2.2.3",
+    "lolex": "^1.5.2",
+    "mocha": "^3.2.0",
+    "phantomjs-prebuilt": "^2.1.13",
+    "sinon": "^1.17.7",
+    "sinon-chai": "^2.8.0",
     "style-loader": "^0.13.1",
     "url-loader": "^0.5.7",
     "vue": "^2.2.1",
@@ -80,5 +97,9 @@
     "webpack": "^2.2.1",
     "webpack-dev-server": "^2.4.1",
     "webpack-merge": "^3.0.0"
+  },
+  "engines": {
+    "node": ">= 4.0.0",
+    "npm": ">= 3.0.0"
   }
 }