2 files changed, 80 insertions, 1 deletions
diff --git a/part4/blog/tests/list_helper.test.js b/part4/blog/tests/list_helper.test.js
index e10f374..a2a8f94 100644
--- a/part4/blog/tests/list_helper.test.js
+++ b/part4/blog/tests/list_helper.test.js
@@ -6,3 +6,69 @@ test('dummy returns one', () => {
   const result = listHelper.dummy(blogs)
   expect(result).toBe(1)
 })
+
+describe('total likes', () => {
+  const blogs = [
+  {
+        _id: "5a422a851b54a676234d17f7",
+        title: "React patterns",
+        author: "Michael Chan",
+        url: "https://reactpatterns.com/",
+        likes: 7,
+        __v: 0
+      
+  },
+    {
+          _id: "5a422aa71b54a676234d17f8",
+          title: "Go To Statement Considered Harmful",
+          author: "Edsger W. Dijkstra",
+          url: "http://www.u.arizona.edu/~rubinson/copyright_violations/Go_To_Considered_Harmful.html",
+          likes: 5,
+          __v: 0
+        
+    },
+    {
+          _id: "5a422b3a1b54a676234d17f9",
+          title: "Canonical string reduction",
+          author: "Edsger W. Dijkstra",
+          url: "http://www.cs.utexas.edu/~EWD/transcriptions/EWD08xx/EWD808.html",
+          likes: 12,
+          __v: 0
+        
+    },
+    {
+          _id: "5a422b891b54a676234d17fa",
+          title: "First class tests",
+          author: "Robert C. Martin",
+          url: "http://blog.cleancoder.com/uncle-bob/2017/05/05/TestDefinitions.htmll",
+          likes: 10,
+          __v: 0
+        
+    },
+    {
+          _id: "5a422ba71b54a676234d17fb",
+          title: "TDD harms architecture",
+          author: "Robert C. Martin",
+          url: "http://blog.cleancoder.com/uncle-bob/2017/03/03/TDD-Harms-Architecture.html",
+          likes: 0,
+          __v: 0
+        
+    },
+    {
+          _id: "5a422bc61b54a676234d17fc",
+          title: "Type wars",
+          author: "Robert C. Martin",
+          url: "http://blog.cleancoder.com/uncle-bob/2016/05/01/TypeWars.html",
+          likes: 2,
+          __v: 0
+        
+    }  
+  ] //end of list  blogs
+
+  test('multiple blogs in a list, returns the sum of all the likes', () => {
+    const result = listHelper.totalLikes(blogs)
+    expect(result).toBe(36)
+  })
+
+
+})
diff --git a/part4/blog/utils/list_helper.js b/part4/blog/utils/list_helper.js
index e52c23c..871bbc3 100644
--- a/part4/blog/utils/list_helper.js
+++ b/part4/blog/utils/list_helper.js
@@ -1,5 +1,18 @@
+const logger = require('../utils/logger.js')
 const dummy = (blogs) => {
   return 1
 }
 
-module.exports = {dummy}
+
+const totalLikes = (blogs) => {
+  likes = 0
+  for (const blog of blogs) {
+    likes += blog.likes
+  }
+
+  return likes
+}
+
+module.exports = {
+  dummy, totalLikes
+}