diff --git a/src/models/friend.js b/src/models/friend.js
new file mode 100644
index 0000000..774611d
--- /dev/null
+++ b/src/models/friend.js
@@ -0,0 +1,16 @@
+'use strict';
+
+module.exports = (sequelize, DataTypes) => {
+  var friend = sequelize.define('Friend', {
+    name: DataTypes.STRING,
+    email: DataTypes.STRING,
+    facebookId: DataTypes.INTEGER
+  }, {
+    classMethods: {
+      associate: (models) => {
+      }
+    }
+  });
+
+  return friend;
+};
diff --git a/src/models/post.js b/src/models/post.js
index 9f437cf..f47bb26 100644
--- a/src/models/post.js
+++ b/src/models/post.js
@@ -4,6 +4,7 @@ module.exports = (sequelize, DataTypes) => {
   var Post = sequelize.define('Post', {
     title: DataTypes.STRING,
     desc: DataTypes.STRING,
+    price: DataTypes.INTEGER
   }, {
     classMethods: {
       associate: (models) => {
diff --git a/test/unit/database/practice.test.js b/test/unit/database/practice.test.js
index 8918755..1cdaa0b 100644
--- a/test/unit/database/practice.test.js
+++ b/test/unit/database/practice.test.js
@@ -42,7 +42,7 @@ describe('practice', () => {
         price: 100,
       };
 
-      let result;
+      let result = await models.Post.create(input);
 
       result.title.should.be.eq('AAA');
       result.desc.should.be.eq('BBB');
@@ -74,7 +74,7 @@ describe('practice', () => {
     it('使用 sequelize 尋找 targetPost ', async (done) => {
       try {
 
-        let findTarget;
+        let findTarget = await models.Post.findById(targetPost.id);
 
         findTarget.id.should.be.eq(targetPost.id);
         done();
@@ -91,8 +91,11 @@ describe('practice', () => {
           price: 999,
         }
 
-        let findTarget;
-        let result;
+        let findTarget = await models.Post.findById(targetPost.id);
+        findTarget.title = input.title;
+        findTarget.desc = input.desc;
+        findTarget.price = input.price;
+        let result = await findTarget.save();
 
         result.title.should.be.eq(input.title);
         result.desc.should.be.eq(input.desc);
@@ -106,7 +109,8 @@ describe('practice', () => {
     it('使用 sequelize 刪除 targetPost', async (done) => {
       try {
 
-        let findTarget;
+        let findTarget = await models.Post.findById(targetPost.id);
+        await findTarget.destroy();
 
         let check = await models.Post.findAll();
         (check.length === 0).should.be.true;
diff --git a/test/unit/facebook/helper.test.js b/test/unit/facebook/helper.test.js
index 6856c56..68aa489 100644
--- a/test/unit/facebook/helper.test.js
+++ b/test/unit/facebook/helper.test.js
@@ -1,23 +1,83 @@
 import FacebookHelper from '../../../src/facebook/helper.js'
+import task1_initModel from '../../../src/database/task1';
 
 describe('facebook-helper', () => {
   let facebookHelper = null;
+  let models = null;
 
-  before((done) => {
-    let userId = "";
-    let token = "";
+  before(async (done) => {
+    let userId = "718927014853837";
+    let token = "EAACEdEose0cBANQIY2OfwDlxZAkTIQZCiiUcCjzbEfcrrAKmRws5qff9ebYEE1dE8pvbEOZAOh2fZCN0tTRbrnNF6mEGFjQOAuy8RuP3uIhkEDj8TMYZAKZBVHbWp1fl2oAco9i8CZCF10FId1YC3yoOOkrZBZBf9bWqSohkjdnLFKBHn9oiIsjCh";
     facebookHelper = new FacebookHelper({userId, token});
+    models = await task1_initModel();
     console.log(facebookHelper);
     done();
   });
 
-  it("get friends list", async (done) => {
+  it("get friends list and save in database", async (done) => {
     try {
       let friends = await facebookHelper.getFriends();
       console.log("friends", friends);
       (friends != null).should.be.true;
       friends.should.be.Array;
       friends[0].should.have.keys("name", "id");
+      
+      friends.forEach((e, i) => {
+        e.facebookId = e.id;
+        e.id = undefined;
+      });
+      await models.Friend.bulkCreate(friends);
+      done();
+    } catch (e) {
+      done(e);
+    }
+  });
+  
+  it("get friends list in database", async (done) => {
+    try {
+      let friends = await models.Friend.findAll();
+      friends.should.be.Array;
+      friends[0].toJSON().should.has.keys(
+        'id',
+        'name',
+        'email',
+        'facebookId',
+        'createdAt',
+        'updatedAt'
+      );
+      done();
+    } catch (e) {
+      done(e);
+    }
+  });
+  
+  it("update one of friend's email in database", async (done) => {
+    try {
+      let friend = await models.Friend.findOne();
+      friend.email = 'hellojs@trunk.studio';
+      let result = await friend.save();
+      result.email.should.be.eq('hellojs@trunk.studio');
+      done();
+    } catch (e) {
+      done(e);
+    }
+  });
+  
+  it("delete the friend who has trunk.studio email in database", async (done) => {
+    try {
+      let friend = await models.Friend.findOne({
+        where: {
+          email: 'hellojs@trunk.studio'
+        }
+      });
+      await friend.destroy();
+      
+      let result = await models.Friend.findOne({
+        where: {
+          email: 'hellojs@trunk.studio'
+        }
+      });
+      (result === null).should.be.true;
       done();
     } catch (e) {
       done(e);