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The Unit Test

Code Block

language	c#

using NUnit.Framework;
using file_loader_service;

namespace file_loader_tests
{
    public class FileLoaderTests
    {
        [Test]
  package com.celestial.mockito.filetodb;

import static org.junit.jupiter.api.Assertions.assertEquals;
import org.junit.jupiter.api.Test;


/**
 *
 * @author selvy
 */
public class LiveFileLoaderTest 
{
    // The inital design is described in this test
    /*
     The weakness should be obvious?  The file to be loaded and it's location
     I use a shared network drive to run this code from different machines, normally
     dev-ing from a PC.  When I ran the code on the laptop from a cafe it 
     immediately failed because the C: on the laptop was completely different
     to the PC, so the original file C:/tmp/KeyboardHandler.txt did not exist
    
     THIS IS A GREAT EXAMPLE OF WHY THE UNIT TEST AND CUT SHOULD NOT BE STRONGLY
     LINKED TO ANY IO - NETWORK, DB, AND FILE SYSTEM
    */
     @Test
     public void load_all_of_file_using_inbuilt_Files_type() 
       {
            // arrange
          String  string fileToLoad = "c:/tmp/KeyboardHandler.java.txt";
 
          FileLoader cut = new FileLoader(fileToLoad);

           int expectedBytesRead = 1383;
         
         // act
            int bytesRead = cut.LoadFileloadFile(fileToLoad);
         
         // assert
            Assert.AreEqualassertEquals(expectedBytesRead, bytesRead);
        }
    }
}

The CUT FileLoader

Code Block

language	c#

using Systempackage com.celestial.mockito.filetodb;
using
import Systemjava.Collectionsio.GenericIOException;
using System.IOimport java.nio.charset.StandardCharsets;

namespace file_loader_service
{
    public class FileLoader
    {
    import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.*;


/**
 *
 * @author selvy
 */
public class FileLoader 
{
   private string fileData;class IntWrapper
   {
   IEnumerable<string> lines = newpublic List<string>();  int value;
   }
  public FileLoader()
   String fileToLoad;
   {List<String> lines = Collections.emptyList();

   public }FileLoader(String fileToLoad) 
   {
   public int LoadFile(string fname) this.fileToLoad = fileToLoad;
   }

{   int loadFile(String fname) 
   {
  try     try
       {
                lines = File.ReadLinesFiles.readAllLines(Paths.get(fname), StandardCharsets.UTF_8);
            }
   
        catch (IOException e) { }



          return CalculateFileSizecalculateFileSize();
    
   }    

    private int CalculateFileSizecalculateFileSize()
        {
       IntWrapper     int result = new 0IntWrapper();

            foreach (string line in lines)
            lines.forEach(line -> {
                result.value += line.Lengthlength();
            });

  

        return result;
        }
.value;
   }
}

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The Unit Test

The CUT FileLoader