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In FindHighestNumber project create a new package that ends with .topicmanager
Create a new setup the new test class as shown here (remember you will have errors)

Code Block

language	c#

namespace TopicManagerTests
{
    package xx.yy.zz.topicmanagerservice

public class TopicManagerTests
   
{

       @Test
 
      public void find_heighest_score_in_empty_array_return_empty_array()
        {
            // Arrange
 
          int[] array = {};
   
        TopicManager cut = new TopicManager();

           int[] expectedResult = {};

            // Act
            Topic[] result = cut.findTopicHighScores(array);


           // Assert
            Assert.That(result, Is.EqualTo(result));
   
    }
    }
}

Create a new class called TopicManager in the FindHighestNumberService project
Clean the code up so that the class is in a package called TopicManagerService topicmanagerservice
Lines 9, 11, and 14 give us enough information to allow us to start thinking about what we are trying to design here. Based on the requirements, we want to pass into the method findTopicHighScores an array of Topics and their accompanying scores. It should return the top topic score of each Topic, we will call this TopicTopScore. Each item in the array being passed into the findTopicHighScores will be called TopicScores (plural I know, but it matches the context, you may want to lose the ‘s' at the end of the class name). Let’s refactor the code to reflect what we have outlined here.

Code Block

language	c#

    public class TopicManagerTests
    {
        @Test
        public   void  find_heighest_score_in_empty_array_return_empty_array()
        {
            // Arrange
            ArrayList<TopicScores> array = new ArrayList<>();
            TopicManager cut = new TopicManager();
            ArrayList<TopicTopScore> expectedResult = new ArrayList<>();
      
            // Act
            ArrayList<TopicTopScore> result = cut.findTopicHighScores( array );
      
            // Assert
            assertEquals( expectedResult, result );
        
        }      
    }

We are now in a good position to get VS to generate the findTopicHighScores with the correct signature

Code Block

language	c#

class TopicManager
{
   ArrayList<TopicTopScore> findTopicHighScores(ArrayList<TopicScores> array)
   {
      return new ArrayList<>();
   }
}

Now we need to complete the first piece of implementation code to pass the test
So you will also need the following pieces of code

Code Block

package com.s2s.demos.topicmanager;

class Topic
{
   private  String topicName;
   int      score;
   
   public   Topic( String topicName, int score)
   {
      this.topicName = topicName;
      this.score = score;
   }

   public String getTopicName()
   {
      return topicName;
   }

   public int getScore()
   {
      return score;
   }
}

Code Block
public class TopicTopScore { }
Code Block
public class TopicScores { }

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