Unit testing In Web API

Atul Rawat

10y24.4k12100Article

12 Comments

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Bharat Pandey9y ago
Very sorry to say. but it is not a way to test your controllers. What you have done, has defeated the sole purpose of the Unit Test. The Unit test should be written to test the business logic, but you have written test which are handled in Try/Catch block which further require you to test this method for the cases when the configuration etc not loaded and code block comes to catch block. You should have gone through with approach of DI+IoC in Controllers and EF layer so that you can easily mock them at your test layer.
Ipsita Sethi10y ago
Good one
- Atul Rawat10y ago
  Thanx for reading
Mohammed Ibrahim10y ago
nice
Atul Rawat10y ago
thanx Rahul Saxena sir
Rahul Kumar Saxena10y ago
Good Show
Sonu Chaudhary10y ago
nice
- Atul Rawat10y ago
  thanx for reading
Vivek Kumar10y ago
Nice sharing
- Atul Rawat10y ago
  thanx for reading
Bhuvanesh Mohankumar10y ago
Good one
Vignesh Mani10y ago
nice

Introduction

Unit testing plays a very important role in software development processes. With the help of unit testing we will test individual methods, if I am to perform unit testing on a method, it not affect the any other methods. A unit is smallest testable part of the application example- function, interface, procedure, classes.

The unit testing basically comes after Integration testing depicted in below figure.

Let Create Unit Testing in Web API Step by Step.

Create MVC Application

Step 1

Go to File, New, then Project.

Step 2

Choose "ASP.NET MVC 4 Web Application" from the list, then provide the application name as "UnitTestingProj" and set the path in the location input where you want to create the application.

Step 3

Now choose the Project Template "Web API".

Step 4

Add API empty controller and Class

public class unittestController : ApiController
{
public List<city> Getcitylist()
{
List<city> Lts = new List<city>();
Lts.Add(new city { cityid = 1, cityname = "noida", Address = "e-block" });
Lts.Add(new city { cityid = 2, cityname = "Roorkee", Address = "Iqbalpur" });
Lts.Add(new city { cityid = 3, cityname = "Delhi", Address = "Rohini" });
Lts.Add(new city { cityid = 4, cityname = "haridwar", Address = "shaket" });
return Lts;
}
public class city
{
public int cityid { get; set; }
public string cityname { get; set; }
public string Address { get; set; }
}
}

For unit testing we need to add nuget package, Right-click on Your project and select Manage NuGet Packages as in the following

Find and install the Microsoft ASP.NET Web API 2.2 Core package as in the depicted figure.

Create another class TestClass

public class testclass
{
[TestMethod]
public void testGetCityList()
{
try
{
var config = new HttpConfiguration();
var Controller = new unittestController();
var Route = config.Routes.MapHttpRoute("DefaultApi", "api/unittest");
var RouteData = new HttpRouteData(Route, new HttpRouteValueDictionary { { "controller", "unittest" } });
var Request = new HttpRequestMessage(HttpMethod.Get, "http://localhost:58068/api/unittest/9/9/9");
Controller.ControllerContext = new System.Web.Http.Controllers.HttpControllerContext(config, RouteData, Request);
Controller.Request = Request;
Controller.Request.Properties[HttpPropertyKeys.HttpConfigurationKey] = config;
GetUserProfileIdForErrorLog objUserProfileId = new GetUserProfileIdForErrorLog();
objUserProfileId.UserProfileIdForError(2792);
ErrorObj objerror = new ErrorObj();
objerror.UserProfileCurrentStatus = "8";
var respone = Controller.Getcitylist();
// Assert.AreEqual(HttpStatusCode.OK, respone.StatusCode);
}
catch (Exception ex)
{
Assert.Fail("Expected no exception, but got: " + ex.Message);
throw;
}
}

All of the test methods contain with the TestMethod attribute. Let us see the procedure to run the Test Method Select Test -> Run -> All Tests to run the tests.

Summary

In this article, we learned how to use unit testing in Web API and role of Web API