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Testing is an essential aspect of any programming language. Testing for chúng tôi applications is possible with the help of Visual Studio.
Visual Studio is used to create test code. It is also used to run the test code for an chúng tôi application. In this way, it becomes simple to check for any errors in an chúng tôi application. In Visual Studio, the testing module comes with an out of box functionality. One can straightaway perform a test for an chúng tôi project.
In this tutorial, you will learn-
Introduction to testing for ASP.NetThe first level of testing an chúng tôi project is unit level testing. This test is the functionality of an application. The testing is conducted to ensure that the application behaves as expected. In chúng tôi the first task is to create a test project in Visual Studio. The test project will contain the necessary code to test the application.
Let’s consider the below web page. In the page, we have the message “Guru99 – ASP.Net” displayed. Now how can we confirm that the correct message is displayed when an chúng tôi project runs. This is done by adding a test project to the chúng tôi solution (used to develop web-based applications). This test project would ensure that the right message is displayed to the user.
Let’s look into more detail now and see how we can work on testing in ASP.Net.
Creating a .NET Unit Testing Project
Before we create a test project, we need to perform the below high-level steps.
Use our ‘DemoApplication’ used in the earlier sections. This will be our application which needs to be tested.
We will add a new class to the DemoApplication. This class will contain a string called ‘Guru99 – ASP.Net.’ This string will be tested in our testing project.
Finally, we will create a testing project. This is used to test the chúng tôi application.
So let’s follow the above high-level steps and see how to implement testing.
Step 1) Ensure the DemoApplication is open in Visual Studio.
Step 2) Let’s now add a new class to the DemoApplication. This class will contain a string called ‘Guru99 – ASP.Net.’ This string will be tested in our testing project.
Follow below step to add a new class.
Step 3) In this step,
Give a name ‘Tutorial.cs’ for the new class.
Now, a new class is added to file “DemoApplication.”
Step 4) Open the new chúng tôi file from “DemoApplication”. Add the string “Guru99 – ASP.Net.”
The file will have some default code already written. Do not bother about that code, just add the below line of code.
namespace DemoApplication { public class Tutorial { public String Name; public Tutorial() { Name = "Guru99 - ASP.Net"; } } }Code Explanation:-
The Name variable is of type string.
Finally in, the constructor of the Tutorial class, assign the value of the Name variable. The value is assigned to “Guru99 – ASP.Net”
Step 5) Now go to the chúng tôi file and add the lines of code to display the text “Guru99 – ASP.Net.”
Code Explanation:-
The first line create’s an object of the class ‘Tutorial’. This is the first step when working with classes and objects. The name given to the object is ‘tp’.
Finally we call ‘tutorial.cs’ from chúng tôi file. It displays the value of the Name variable.
When you run the above program in Visual Studio, you will get the following output.
Output:-
From the output, you see the message “Guru99 – ASP.Net” displayed.
Step 6) Now let’s add our test project to the Demo Application. This is done with the help of Visual Studio.
In the context menu, choose the option ‘New Project’.
Step 7) The step involves the addition of the Unit Test project to the demo application.
Choose the item as ‘Unit Test Project’ from the list, which appears in the center part of the dialog box.
Give a name for the test project. In our case, the name given is ‘DemoTest’.
You will eventually see the DemoTest project added to the solution explorer. With this, you can also see other files like chúng tôi properties, etc. are generated by default.
Running the Test Project
The test project created in the earlier section is used to test our chúng tôi application. In the following steps, we are going to see how to run the Test project.
The first step would be to add a reference to the chúng tôi project. This step is carried out so that the test project has access to the chúng tôi project.
Then we will write our test code.
Finally, we will run the test using Visual Studio.
Step 1) To test our Demo Application, first test project needs to reference the Demo Application. Add a reference to the chúng tôi solution.
Step 2) The next step is to add a reference to the DemoApplication.
Select the Projects option from the left-hand side of the dialog box
This will allow a demotest project to test our DemoApplication.
Step 3) Now it’s time to add the test code to our test project.
This is the file which will be run to test the chúng tôi project.
You will see the below code added by Visual Studio in the chúng tôi file. This is the basic code needed for the test project to run.
Step 4) The next step is to add the code which is used to test the string “Guru99 – ASP.Net.”
using System; using Microsoft.VisualStudio.TestTools.UnitTesting; using DemoApplication; namespace DemoTest { [TestClass] public class UnitTestl { [TestMethod] public void TestMethodl() { Tutorial tp = new Tutorial(); Assert.AreEqual(tp.Name,"Guru99 - ASP.Net"); } } }
Create a new object called ‘tp’ of the type Tutorial
The Assert.AreEqual method is used in .Net to test if a value is equal to something. So in our case, we are comparing the values of chúng tôi to Guru99 – ASP.Net.
Output:-
A test Explorer window will appear in Visual Studio. This will show the above result and display that a successful test was run in Visual Studio.
Summary
ASP.Net can add Unit Testing for applications.
To test an application, you need to add a Unit Test project to the chúng tôi solution.
All tests can be made to run in Visual Studio. A test explorer will show the results of all of the tests.
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