Add Vue jest plugin, move test

jest.config.js

@@ -0,0 +1,26 @@
+module.exports = {
+  moduleFileExtensions: [
+    'js',
+    'jsx',
+    'json',
+    'vue'
+  ],
+  transform: {
+    '^.+\\.vue$': 'vue-jest',
+    '.+\\.(css|styl|less|sass|scss|svg|png|jpg|ttf|woff|woff2)$': 'jest-transform-stub',
+    '^.+\\.jsx?$': 'babel-jest'
+  },
+  transformIgnorePatterns: [
+    '/node_modules/'
+  ],
+  moduleNameMapper: {
+    '^@/(.*)$': '<rootDir>/src/$1'
+  },
+  snapshotSerializers: [
+    'jest-serializer-vue'
+  ],
+  testMatch: [
+    '**/tests/unit/**/*.spec.(js|jsx|ts|tsx)|**/__tests__/*.(js|jsx|ts|tsx)'
+  ],
+  testURL: 'http://localhost/'
+}