diff --git a/packages/comment-to-assert/.gitignore b/packages/comment-to-assert/.gitignore
index 3ab6a7b..0dfab2a 100644
--- a/packages/comment-to-assert/.gitignore
+++ b/packages/comment-to-assert/.gitignore
@@ -80,3 +80,5 @@ crashlytics.properties
 crashlytics-build.properties
 
 
+
+lib
\ No newline at end of file
diff --git a/packages/comment-to-assert/example/example.js b/packages/comment-to-assert/example/example.js
new file mode 100644
index 0000000..60fa00e
--- /dev/null
+++ b/packages/comment-to-assert/example/example.js
@@ -0,0 +1,10 @@
+// LICENSE : MIT
+"use strict";
+var assert = require("assert");
+var toAssert = require("comment-to-assert");
+var resultOfPrimitive = toAssert.commentToAssertFromCode("1;// => 1");
+assert.equal(resultOfPrimitive, 'assert.equal(1, 1);');
+var resultOfObject = toAssert.commentToAssertFromCode("[1];// => [1]");
+assert.equal(resultOfPrimitive, 'assert.deepEqual([1], [1]);');
+var resultOfIdentifier = toAssert.commentToAssertFromCode("var foo=1;foo;// => 1");
+assert.equal(resultOfPrimitive, 'assert.equal(foo, 1);');
diff --git a/packages/comment-to-assert/package.json b/packages/comment-to-assert/package.json
index ee222b2..d36d33d 100644
--- a/packages/comment-to-assert/package.json
+++ b/packages/comment-to-assert/package.json
@@ -13,12 +13,18 @@
   },
   "version": "1.0.0",
   "description": "convert single line comment to assert.",
-  "main": "index.js",
+  "main": "lib/comment-to-assert.js",
+  "files": [
+    "lib"
+  ],
   "directories": {
     "test": "test"
   },
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "build": "babel src --out-dir lib --source-maps",
+    "watch": "babel src --out-dir lib --watch --source-maps",
+    "test": "mocha test/*",
+    "example": "npm i && npm run build && cd example && npm test"
   },
   "keywords": [
     "ast",
diff --git a/packages/comment-to-assert/src/comment-to-assert.js b/packages/comment-to-assert/src/comment-to-assert.js
index 215a19f..85e69b4 100644
--- a/packages/comment-to-assert/src/comment-to-assert.js
+++ b/packages/comment-to-assert/src/comment-to-assert.js
@@ -8,7 +8,15 @@ import {
     wrapAssert
     } from "./ast-utils"
 export function commentToAssertFromCode(code) {
-    return code;
+    var parseOption = {
+        loc: true,
+        range: true,
+        comment: true,
+        attachComment: true
+    };
+    var AST = parse(code, parseOption);
+    var modifiedAST = commentToAssertFromAST(AST);
+    return generate(modifiedAST);
 }
 export function commentToAssertFromAST(ast) {
     estraverse.replace(ast, {
diff --git a/packages/comment-to-assert/test/comment-to-assert-test.js b/packages/comment-to-assert/test/comment-to-assert-test.js
index 8193e7b..8e4add7 100644
--- a/packages/comment-to-assert/test/comment-to-assert-test.js
+++ b/packages/comment-to-assert/test/comment-to-assert-test.js
@@ -2,7 +2,7 @@ import assert from "power-assert"
 import {
     commentToAssertFromCode,
     commentToAssertFromAST
-} from "../src/comment-to-assert"
+    } from "../src/comment-to-assert"
 import {parse} from "esprima"
 import {astEqual} from "./lib/ast-equal"
 
@@ -29,6 +29,11 @@ describe("comment-to-assert", function () {
             assert(typeof result === "string");
             astEqual(result, code);
         });
+        it("should keep code mean", function () {
+            var code = "1;// => 1";
+            var result = commentToAssertFromCode(code);
+            assert.equal(result, "assert.equal(1, 1);");
+        });
     });
     describe("#commentToAssertFromAST", function () {
         it("should return AST", function () {