Unit
Test
Unit testing is used to test a small unit
of code.
MS
Unit Test - Build with Visual Studio
NUnit
Test - Can be downloaded from http://www.nunit.org/index.php?p=download
and referred from the Visual Studio Project
MS
Unit Test VS NUnit Test
|
MS
Unit Test
|
NUnit
Test
|
|
Take
more time to run your test suite
|
Faster
|
|
Uses
much resources
|
Uses
Less resources
|
|
Not
Integrated fully with Visual Studio (You may try integrated runners including
Resharper and TestDriven.NET however, some attributes may not be supported)
|
Fully
Integrated with Visual Studio
|
|
NUnit
has frequent version updates
|
MS-Test
has only one per VS version
|
|
Exception
message assertion - can be done using attribute in NUnit
|
Must
be done using Try-Catch in MS-Test
|
|
NUnit
wins for Unit Testing
|
MS
Test has much better abilities for integration based testing and team testing
|
Now let us implement NUnit and MSUnit Testing to test
Addition and Subtraction methods in the following Project:
1.
Open Visual
Studio Create a Console Application
named NUnitTestSample
2.
Paste the following
code in Program.cs file
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace NUnitTestSample
{
class Program
{
static void Main(string[]
args)
{
try
{
// Get two numbers
Console.WriteLine("Enter two numbers \n");
Console.WriteLine("First number --> Press Enter --> Second
number --> Press
Enter\n");
int number1;
int number2;
number1 = int.Parse(Console.ReadLine());
Console.WriteLine("\n");
number2 = int.Parse(Console.ReadLine());
// Create an onject for the class MathsHelper
MathsHelper
helper = new MathsHelper();
// Call the Add method
int x =
helper.Add(number1, number2);
Console.WriteLine("\nThe sum of " + number1 +
" and "
+ number2 + " is " + x);
Console.ReadKey();
// Call the Subtract function
int y =
helper.Subtract(number1, number2);
Console.WriteLine("\nThe difference between " +
number1 + " and "
+ number2 + " is "
+ y);
ConsoleKeyInfo
info = Console.ReadKey();
if (info.Key == ConsoleKey.Enter)
goto Finish;
// Throw any Exception
throw
new
System.Exception();
Finish:
Console.WriteLine("\nThank you\n");
}
// Catch the exception
catch
{
Console.WriteLine("Please Enter a valid number following the
instruction\n");
}
}
}
// Class which contains a method to add and subtract
public class
MathsHelper
{
public
MathsHelper() { }
// Add method
public int Add(int a, int b)
{
int x = a + b;
return
x;
}
// Subtract method
public int Subtract(int a, int b)
{
int x = a - b;
return
x;
}
}
}
3.
Right Click
NUnitTestSample Solution and add a new class Library and give it the name ClassLibrary.Test (this
is the NUnitTest project)
4. Pate the following code in the created TestClass.cs file listed within
ClassLibrary.Test
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace NUnitTestSample
{
class Program
{
static void Main(string[]
args)
{
try
{
// Get two numbers
Console.WriteLine("Enter two numbers \n");
Console.WriteLine("First number --> Press Enter --> Second
number --> Press
Enter\n");
int number1;
int number2;
number1 = int.Parse(Console.ReadLine());
Console.WriteLine("\n");
number2 = int.Parse(Console.ReadLine());
// Create an onject for the class MathsHelper
MathsHelper
helper = new MathsHelper();
// Call the Add method
int x =
helper.Add(number1, number2);
Console.WriteLine("\nThe sum of " + number1 +
" and " + number2 + " is "
+ x);
Console.ReadKey();
// Call the Subtract function
int y =
helper.Subtract(number1, number2);
Console.WriteLine("\nThe difference between " +
number1 + " and "
+ number2 + " is "
+ y);
ConsoleKeyInfo
info = Console.ReadKey();
if (info.Key == ConsoleKey.Enter)
goto Finish;
// Throw any Exception
throw
new
System.Exception();
Finish:
Console.WriteLine("\nThank you\n");
}
// Catch the exception
catch
{
Console.WriteLine("Please Enter a valid number following the
instruction\n");
}
}
}
// Class which contains a method to add and subtract
public class
MathsHelper
{
public
MathsHelper() { }
// Add method
public int Add(int a, int b)
{
int x = a + b;
return
x;
}
// Subtract method
public int Subtract(int a, int b)
{
int x = a - b;
return
x;
}
}
}
5.
Right click NUnitTestSample
and click Add New Project search Unit test in the Installed section and add a
new Unit test Project called MSUnitTests
6.
Rename the class file listed within MSUnitTest
as MSUnitTest.cs
and paste the following code inside it
using System;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using NUnitTestSample;
namespace MSUnitTests
{
[TestClass]
public class
MSUnitTest
{
[TestMethod]
public
void
Add()
{
MathsHelper
helper = new MathsHelper();
int result =
helper.Add(20, 10);
// Check if the add function return 30
Assert.AreEqual(result,30);
}
[TestMethod]
public
void
Sub()
{
MathsHelper
helper = new MathsHelper();
int result =
helper.Subtract(20, 10);
// Check if the sub function return 10
Assert.AreEqual(result,10);
}
}
}
7.
Now the Reference
needed to added for both the Unit Test Projects
8.
For MSUnitTests
Right click “References” and then “Add reference” now browse and and Click
NUnitTestSample, this allows you to use the MathsHelper methods in the test Project.
9.
Install the
downloaded and install the NUnitTest stable
release (win) from http://www.nunit.org/index.php?p=download
10. Now you need to add a reference to the NUnit Test
framework from the ClassLibrary.Test (NUnitTest) project.
11. Right click References of the ClassLibrary.Test Project,
click Add Reference, Browse to the location where the NUnit stable release is
installed in your PC, (in my case it is C:\Program Files (x86)\NUnit 2.6.3\bin\)
and reference all the dll required.
12. Press Control + F5 to run the application
13. To run the MSUnitTests , Open Test – Window – Test Explorer
and run all tests
14. To Run ClassLibrary.Test (NUnit Test ) open the NUnit Stable version
installed.
15. Click File – Open Project and browse the ClassLibrary
.Test project and click Run.
16. This how you can test an application using NUnit and
MSUnit testing framework. Now it is your personal preference about which you like
to choose.
This project will be uploaded to https://github.com/shaliniac/ShaliniNETSamples/tree/master
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