diff --git a/.gitignore b/.gitignore
index e009c02..394ff72 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 npm-debug.log
 node_modules
 /lib/
+/coverage/
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index 2e43219..3acf9fd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5,12 +5,21 @@
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+        "@babel/highlight": "7.0.0-beta.40"
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+    "@babel/highlight": {
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@@ -25,29 +34,29 @@
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@@ -571,7 +580,7 @@
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@@ -643,13 +652,13 @@
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@@ -668,14 +677,14 @@
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@@ -2942,16 +2951,16 @@
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@@ -5906,28 +5915,28 @@
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-        "acorn": "5.4.0",
+        "acorn": "5.4.1",
         "acorn-globals": "4.1.0",
         "array-equal": "1.0.0",
         "browser-process-hrtime": "0.1.2",
@@ -6823,9 +6842,9 @@
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       "dependencies": {
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-          "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.4.0.tgz",
-          "integrity": "sha512-bkLTrtPfRASTxDXFaih7SbeYSsQ8MjrqCQKMrgZ4Hc7kYI//WVU6rDTAIqVrAudjgMFQEGthYfodtaw8dTRJrg==",
+          "version": "5.4.1",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.4.1.tgz",
+          "integrity": "sha512-XLmq3H/BVvW6/GbxKryGxWORz1ebilSsUDlyC27bXhWGWAZWkGwS6FLHjOlwFXNFoWFQEO/Df4u0YYd0K3BQgQ==",
           "dev": true
         }
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@@ -10032,9 +10051,9 @@
       "dev": true
     },
     "pretty-format": {
-      "version": "22.1.0",
-      "resolved": "https://registry.npmjs.org/pretty-format/-/pretty-format-22.1.0.tgz",
-      "integrity": "sha512-0HHR5hCmjDGU4sez3w5zRDAAwn7V0vT4SgPiYPZ1XDm5sT3Icb+Bh+fsOP3+Y3UwPjMr7TbRj+L7eQyMkPAxAw==",
+      "version": "22.4.0",
+      "resolved": "https://registry.npmjs.org/pretty-format/-/pretty-format-22.4.0.tgz",
+      "integrity": "sha512-pvCxP2iODIIk9adXlo4S3GRj0BrJiil68kByAa1PrgG97c1tClh9dLMgp3Z6cHFZrclaABt0UH8PIhwHuFLqYA==",
       "dev": true,
       "requires": {
         "ansi-regex": "3.0.0",
@@ -10841,9 +10860,9 @@
       "integrity": "sha512-kKvNJn6Mm93gAczWVJg7wH+wGYWNrDHdWvpUmHyEsgCtIwwo3bqPtV4tR5tuPaUhTOo/kvhVwd8XwwOllGYkbg=="
     },
     "sane": {
-      "version": "2.3.0",
-      "resolved": "https://registry.npmjs.org/sane/-/sane-2.3.0.tgz",
-      "integrity": "sha512-6GB9zPCsqJqQPAGcvEkUPijM1ZUFI+A/DrscL++dXO3Ltt5q5mPDayGxZtr3cBRkrbb4akbwszVVkTIFefEkcg==",
+      "version": "2.4.1",
+      "resolved": "https://registry.npmjs.org/sane/-/sane-2.4.1.tgz",
+      "integrity": "sha512-fW9svvNd81XzHDZyis9/tEY1bZikDGryy8Hi1BErPyNPYv47CdLseUN+tI5FBHWXEENRtj1SWtX/jBnggLaP0w==",
       "dev": true,
       "requires": {
         "anymatch": "1.3.2",
@@ -12136,9 +12155,9 @@
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     },
     "test-exclude": {
-      "version": "4.1.1",
-      "resolved": "https://registry.npmjs.org/test-exclude/-/test-exclude-4.1.1.tgz",
-      "integrity": "sha512-35+Asrsk3XHJDBgf/VRFexPgh3UyETv8IAn/LRTiZjVy6rjPVqdEk8dJcJYBzl1w0XCJM48lvTy8SfEsCWS4nA==",
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/test-exclude/-/test-exclude-4.2.0.tgz",
+      "integrity": "sha512-8hMFzjxbPv6xSlwGhXSvOMJ/vTy3bkng+2pxmf6E1z6VF7I9nIyNfvHtaw+NBPgvz647gADBbMSbwLfZYppT/w==",
       "dev": true,
       "requires": {
         "arrify": "1.0.1",
@@ -12424,18 +12443,18 @@
       }
     },
     "ts-jest": {
-      "version": "22.0.2",
-      "resolved": "https://registry.npmjs.org/ts-jest/-/ts-jest-22.0.2.tgz",
-      "integrity": "sha512-11FP07YRE12atlByBq65uidNexL7/IZsdjaK36A9fSyirCy2zDmT1QGBgMrzd83KAn5bgE3CImdY4ery79H8yQ==",
+      "version": "22.0.4",
+      "resolved": "https://registry.npmjs.org/ts-jest/-/ts-jest-22.0.4.tgz",
+      "integrity": "sha512-cQlgWYCakArbHW5B5RgZvmBomepOuIBLCR972AdWuaK6VmLxbmCh8OCaGGcBChf7dv/8YNACYvC6jeebQDKgyA==",
       "dev": true,
       "requires": {
         "babel-core": "6.26.0",
         "babel-plugin-istanbul": "4.1.5",
         "babel-plugin-transform-es2015-modules-commonjs": "6.26.0",
-        "babel-preset-jest": "22.1.0",
+        "babel-preset-jest": "22.2.0",
         "cpx": "1.5.0",
         "fs-extra": "4.0.3",
-        "jest-config": "22.1.4",
+        "jest-config": "22.4.0",
         "pkg-dir": "2.0.0",
         "source-map-support": "0.5.3",
         "yargs": "11.0.0"
@@ -13338,13 +13357,13 @@
       "dev": true
     },
     "vue-jest": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/vue-jest/-/vue-jest-2.0.0.tgz",
-      "integrity": "sha512-q2qfdcTfBXv9vR3+kmy/aGhh+ep2Nxg7esmdfXFqnOrPiUTqs9OX8QNCo9IG1DKFuB1PMBNx7ADW8Nluns+Qgg==",
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/vue-jest/-/vue-jest-2.1.0.tgz",
+      "integrity": "sha512-7SYSqfXY6toB5Pr0vcD/AUS+vqTlnkxqS85n/kVGP4i7TShhVTwwJ/Rv+8s4xEeLMclS5qP0RVMAAKbY4BiUDw==",
       "dev": true,
       "requires": {
         "babel-plugin-transform-es2015-modules-commonjs": "6.26.0",
-        "chalk": "2.3.0",
+        "chalk": "2.3.1",
         "extract-from-css": "0.4.4",
         "find-babel-config": "1.1.0",
         "js-beautify": "1.7.5",
@@ -13365,29 +13384,29 @@
           }
         },
         "chalk": {
-          "version": "2.3.0",
-          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.3.0.tgz",
-          "integrity": "sha512-Az5zJR2CBujap2rqXGaJKaPHyJ0IrUimvYNX+ncCy8PJP4ltOGTrHUIo097ZaL2zMeKYpiCdqDvS6zdrTFok3Q==",
+          "version": "2.3.1",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.3.1.tgz",
+          "integrity": "sha512-QUU4ofkDoMIVO7hcx1iPTISs88wsO8jA92RQIm4JAwZvFGGAV2hSAA1NX7oVj2Ej2Q6NDTcRDjPTFrMCRZoJ6g==",
           "dev": true,
           "requires": {
             "ansi-styles": "3.2.0",
             "escape-string-regexp": "1.0.5",
-            "supports-color": "4.5.0"
+            "supports-color": "5.2.0"
           }
         },
         "has-flag": {
-          "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-2.0.0.tgz",
-          "integrity": "sha1-6CB68cx7MNRGzHC3NLXovhj4jVE=",
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
+          "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0=",
           "dev": true
         },
         "supports-color": {
-          "version": "4.5.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-4.5.0.tgz",
-          "integrity": "sha1-vnoN5ITexcXN34s9WRJQRJEvY1s=",
+          "version": "5.2.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.2.0.tgz",
+          "integrity": "sha512-F39vS48la4YvTZUPVeTqsjsFNrvcMwrV3RLZINsmHo+7djCvuUzSIeXOnZ5hmjef4bajL1dNccN+tg5XAliO5Q==",
           "dev": true,
           "requires": {
-            "has-flag": "2.0.0"
+            "has-flag": "3.0.0"
           }
         }
       }
diff --git a/package.json b/package.json
index 81b4374..cb774df 100644
--- a/package.json
+++ b/package.json
@@ -12,6 +12,7 @@
     "build": "tsc -p tsconfig.main.json && webpack --config webpack.config.js",
     "test": "jest",
     "test:watch": "jest --watch",
+    "test:coverage": "jest --coverage",
     "format": "prettier --write \"{src,test}/**/*.{ts,vue}\""
   },
   "repository": "https://github.com/ktsn/vue-designer",
@@ -58,6 +59,7 @@
       "json",
       "vue"
     ],
+    "collectCoverageFrom": ["src/**/*.{ts,vue}"],
     "globals": {
       "ts-jest": {
         "tsConfigFile": "tsconfig.test.json"
@@ -76,25 +78,25 @@
     "ws": "^4.0.0"
   },
   "devDependencies": {
-    "@types/babylon": "^6.16.2",
     "@types/babel-types": "^7.0.0",
+    "@types/babylon": "^6.16.2",
     "@types/jest": "^22.1.1",
     "@types/ws": "^4.0.0",
     "@vue/test-utils": "^1.0.0-beta.11",
     "css-loader": "^0.28.9",
-    "jest": "^22.1.4",
+    "jest": "^22.4.0",
     "node-sass": "^4.7.2",
     "npm-run-all": "^4.1.2",
     "prettier": "1.10.2",
     "sass-loader": "^6.0.6",
     "style-loader": "^0.20.1",
     "testdouble": "^3.5.0",
-    "ts-jest": "^22.0.2",
+    "ts-jest": "^22.0.4",
     "ts-loader": "^3.4.0",
     "typescript": "^2.7.1",
     "vscode": "^1.1.10",
     "vue": "^2.5.13",
-    "vue-jest": "^2.0.0",
+    "vue-jest": "^2.1.0",
     "vue-loader": "^14.1.1",
     "vuex": "github:ktsn/vuex#fc1f29b",
     "webpack": "^3.10.0",