NUnit vs. xUnit vs. MSTest (With Examples)

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NUnit vs. xUnit vs. MSTest (With Examples)

This clause compares and contrasts the three most popular unit try frameworks in ASP.NET Core: NUnit, xUnit, and MSTest.

Documentation

What is Unit Testing?

Unit testing has been around since the beginning of package testing. Unit testing lays the groundwork for the rest of your software speech and testing pipelines, making it one of the near crucial phases of the package maturation lifecycle.

Unit testing entails writing codification that examines other blocks of code to assure that they work as destine. Unit test examine the most fundamental unit of any application. Only after you have overcome unit testing can you go on to other types of testing – like,, and integrating testing.

Unit examine typically necessitates the use of singular unit try fabric for each scheduling language and framework. The three most democratic unit testing frameworks in ASP.NET Core, for illustration, are NUnit, xUnit, and MSTest. These frameworks differ significantly in damage of features and implementation.

Most developers desire to cognize which frameworks employment best in which situations and how to choose the best one for their specific C # code. This article compares and contrasts the NUnit, xUnit, and MSTest frameworks.

What is NUnit?

Adapted from JUnit,NUnitis a free unit testing framework for all .NET languages. NUnit was released under the MIT permit and is entirely exposed source. Although the maiden looping of NUnit was a port ofJUnit, version 3 has been entirely rewritten from the ground up with various new features and support for a turn of .NET platforms.

NUnit works by isolating the full application into distinct faculty. Each module is severally tested to ensure that the goal is met. The static methods of NUnit & # x27; s custom attributes and the Assert class ’ s rich set of assertions make it leisurely to create unit examination cases. Custom attribute of NUnit test runners indicate the front of unit testing code in these stratum or functions. Assert classes, on the other hand, are used to determine whether or not the block of code under review meets a preset condition. If an assertion fails (i.e., the condition is not met), the assertion method call does not render, and an mistake is return to point that the test failed. Custom attributes includeTestFixture, SetUp, TearDown, Test, Category, Ignore, TestCase, Repeat, MaxTime, and so on.

What is xUnit?

xUnit.netis a community-focused, free, and open origin unit testing tool for the .NET frameworks. It was written by the Almighty of the NUnit fabric, James Newkirk and Brad Wilson, and it ’ s license under the Apache 2 OSI. When it come to unit examination, xUnit works well with Xamarin, ReSharper, CodeRush, TestDriven.NET, and Console Runner. The “ x ” in xUnit refers to the programming language for which the framework was created – for example, we have JUnit (for Java codification), NUnit (for C #, VB.NET, and other .NET languages), CppUnit (for C++), and PyUnit (for Python).

xUnit is plan in such a way that it allows you to control your tests by adding new attributes. It adds custom-made functionality to the Assert class by extending theContains, DoesNotContain, Equal, NotEqual, InRange, and NotInRangemethods. It also supports two types of unit trial that use[Fact] or [Theory]annotations to prove affirmation. The xUnit.net test runner utilise the[Fact]attribute to name a “ normal ” unit test that is always true (a test method that takes no method arguments and tests invariant conditions). Meanwhile,[Theory]annotation tests accept multiple inputs and are true for a specific set of information. By default, xUnit scat all tests in separate class files in parallel. This allow us to run our exam in analogue without any especial configuration.

What Is MSTest?

MSTest is a unit prove framework that was developed by Microsoft and integrated into their Visual Studio IDE. There is also an open source version called MSTest V2, which is now uncommitted fordownload from NuGet.org. This allow you to assess the code by using a wide range of attributes at the method and class levels instead of using external instrument.

The primary features of MSTest V2 are:

It ’ s open germ– The MSTest V2 project isopen sourceand hosted on GitHub. Its open repositories areMicrosoft/testfx and Microsoft/testfx-docs.
It provides cross-platform support– MSTest V2 allow developers to create tests for the .NET Framework, .NET Core, and ASP.NET Core on Linux, Mac, and Windows.
It enables data-driven testing– By enabling data-driven examination, MSTest V2 allows users to specify the behavior of their test. This way, a individual method can be execute multiple clip by legislate different input arguments.
It support parallel test execution– MSTest V2 indorse parallel trial execution, which speeds up the unhurt summons. In-assembly parallel exam execution do it possible to run trial concurrently via RunSettings or note.
It enable customization through annotations– The MSTest V2 framework allow you to customize the test executing lifecycle through notation like[TestClass], [TestMethod], [TestInitialize], and [TestCleanup].
It ’ s extensible– Its features can now be extended with unique test attributes and singular assertions, just like early test frameworks.

NUnit vs. xUnit vs. MSTest: Feature Differences

The three most popular .NET unit testing frameworks (discussed above) each office otherwise by providing testing teams with various features. In this section, we will compare each feature separately.

Criteria	NUnit Test	xUnit Test	MSTest V2
Grouping Tests by Class	[TestFixture]	Not Available	[TestClass]
Test Setup and Teardown (Note: The setup method takes a builder, while a teardown needs an IDisposable interface.)	[SetUp] [TearDown]	Not Available	[TestInitialize] [TestCleanup]
Single Test Case Declaration	[Test]	[Fact] / [Theory]	[TestMethod]
Multiple Data Test Cases Declaration For autonomous testing across multiple user personas, check out SUSATest — it explores your app like 10 different real users.	[TestCase]	[Theory] [InlineData]	[DataTestMethod] [DataRow]
Repeat Initialization for Each Test	[SetUp] [TearDown]	[Ctor], [IDisposable]	[TestInitialize] [TestCleanup]
One-Time Initialization for All Tests in One Class	[OneTimeSetUp] [OneTimeTearDown]	[MemberData] Or [ClassData] [MethodMember] or [PropertyMember]	[ClassInitialize] [ClassCleanup]
One-Time Initialization for All Tests in One Assembly	Dedicated class with [SetUpFixture] + [OneTimeSetUp] [OneTimeTearDown]	[MemberData] Or [ClassData], [PropertyMember]	[TestClass] + [AssemblyInitialize] [AssemblyCleanup]
Execution in Isolation	Configurable	Default support	Default support
Skipping a Test	[Fact (Skip= ” ground ”)]	[Ignore (“ reason ”)]	[Ignore]
Documentation	Comprehensive and well-maintained corroboration. Available here .	Does not hold well-maintained documentation. Available here .	Comprehensive and well-maintained documentation. Available here .

NUnit vs. xUnit vs. MSTest Code Examples

Sample NUnit Test

Below is a sample test case that commence a browser locally, executes a very elementary exam using NUnit and Chrome web driver, and then close out the browser instance.

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using NUnit.Framework;
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using OpenQA.Selenium;
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using OpenQA.Selenium.Chrome;
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using OpenQA.Selenium.Support.UI;
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namespace WebDriver_CSharp_Example
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{
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[TestFixture]
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public class Chrome_Sample_test
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    {
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individual IWebDriver driver;
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public string homeURL;
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[Test (Description= & quot; Check SauceLabs Homepage for Login Link & quot;)]
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publicvoidLogin_is_on_home_page () {
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homeURL = & quot; https: //www.SauceLabs.com & quot;;
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driver.Navigate () .GoToUrl (homeURL);
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WebDriverWait wait = new WebDriverWait (driver,
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System.TimeSpan.FromSeconds (15));
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wait.Until (driver = & gt;
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driver.FindElement (By.XPath (& quot; //a [@ href= & # x27; /beta/login & # x27;] & quot;)));
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IWebElement element =
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driver.FindElement (By.XPath (& quot; //a [@ href= & # x27; /beta/login & # x27;] & quot;));
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Assert.AreEqual (& quot; Sign In & quot;, element.GetAttribute (& quot; text & quot;));
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       }
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[TearDown]
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publicvoidTearDownTest ()
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        {
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driver.Close ();
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        }
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       [SetUp]
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publicvoidSetupTest ()
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        {
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homeURL = & quot; http: //SauceLabs.com & quot;;
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driver = new ChromeDriver ();
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        }
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   }
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}
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Sample xUnit Test

The pursuit is a sample unit test written use the xUnit framework in C # to validate arithmetical methods of addition and multiplication:

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public class MathUnitxTest
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    {  
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        [Fact]  
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public void Task_TestAddition ()
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        {  
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var numA=12, numB=4, result=16;
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var calculatedSum = MathOperation.Add (numA, numB);
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Assert.Equal (expectedValue, calculatedSum, 1);
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        }  
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        [Fact]  
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public void Task_TestMultiplication ()
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        {  
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var numA=5, numB=4, result=20;
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var calculatedOutput= MathOperation.Multiply (num1, num2);
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Assert.Equal (solution, calculatedOutput, 2);
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        } 
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    }

Sample MSTest Test

The pursuit is a sample unit test written using the MSTest model in C # to validate arithmetic methods of increase and subtraction:

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namespace Messages.Tests;
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utilize Microsoft.VisualStudio.TestTools.UnitTesting;
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[TestClass]
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public class ArithmeticMsTest
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{
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[DataTestMethod]
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[DataRow (1, 2, 3)]
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[DataRow (2, 2, 4)]
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[DataRow (-1, 4, 3)]
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public void Task_TestAddition (int x, int y, int expected)
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    {
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int sum = Basic.add (x, y);
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Assert.AreEqual (sum, expected);
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    }
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[DataTestMethod]
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[DataRow (1, 2, -1)]
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[DataRow (2, 2, 0)]
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[DataRow (3, 2, 1)]
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public void Task_TestSubtraction (int x, int y, int expected)
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    {
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int res = Basic.sub (x, y);
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Assert.AreEqual (res, expected);
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    }
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}

NUnit vs. xUnit vs. MSTest: Which Should You Choose?

The Xunit, Nunit, and MSTest .NET frameworks feature all acquire over the last few years. For example, equate to MSTest V1, MSTest V2 offers significantly improved usability and compatibility with other tools. With their developers offering more community-focused support, the xUnit and NUnit frameworks have besides grown more sophisticated.

Ultimately, all three frameworks supply features and tools that enable detailed unit examine. Based on the above comparison of their distinguishing features, you can see that it get downwardly to personal preference. If we had to prefer a dearie, we would pick NUnit due to its straightforward appointment convention for property and affirmation. It can also be used along with and web drivers to run a variety of machine-driven unit tests – includecross-browser testing.