It is required to mark not only test methods, but also test classes with attributes, so the test code is littered with this unnecessary verbosity. It brings xUnit tests to everyone out of the box. 0. Both the NUnit test framework DLLs and the NUnit console test runner are distributed as NuGet packages so we didn't have to install anything on the build server to get it working. I appreciate the opinion of someone in the career field as I learning from scratch. XUnit continues to innovate. We have been mandated to use XUnit tests, but our solution is all .NET Framework. 100% this. The makers of NUnit didn't like a few things about it so they went off and created xUnit. If you are familiar with NUnit then it's like a hybrid of the category and propertyattributes. Xunit is updated more frequently and as others have pointed out is more popular with dot net core. To make some setup code run before some tests, but not before others, you have to adhere to weird, non-obvious namespace conventions. NXunit Test Explorer for Visual Studio Code. Figure out which one you like the best, and pick that one. I’ve just started yet another pet project and wanted to pick a unit testing framework (.NET). Using MSTest, xUnit or NUnit with dotnet core. JUnit. Votes 0 My tests become more verbose, but they contain all the information I need to understand them. Another favourite question of mine is "What's the purpose of TDD". Jest has overtaken all the other frameworks in popularity terms on github but given its close association with React this is not particula… Especially annoying when you're making a large refactoring. xUnit.net is a free, open source, community-focused unit testing tool for the .NET Framework. They were informative and mostly correct, unfortunately all completely missed the one big difference between those two excellent unit testing frameworks… A workaround is using constructor to init a test class. In xUnit you also don't have one test attribute, instead, you have Facts and Theories! Couple that with FluentAssertions and it's a fantastic experience. Also the documentation on Xunit was not as thorough as Nunits when we were making our decison. I know some people think that you should only use one assert per test but it feels a bit weird to not give the user the choice of a message or not. I could have just moved my per-test setups to constructor setups, but I haven't. There is no test context, so in something like a Dispose method you can't know if the test passed or failed. Those are simply 3 slightly different flavours of the same thing. Honestly, either choice is fine. I use both; NUnit at the office, and XUnit for my personal projects. Also, xUnit has the static Record.Exception(Action action) methods, which really helps you test your exception handling while still following the Arrange-Act-Assert flow: It is a very simple utility, and it can easily be implemented on your own for use with NUnit. Apparently, the problem has been long lingering there, as @TheFastCat notes. In the question “What are the best unit testing frameworks for.NET?” xUnit.NET is ranked 1st while NUnit is ranked 2nd. 3. It is an instance of the xUnit architecture for unit testing frameworks. I sort of liked xUnit better, but it's been so long I've forgotten exactly why. So start a small project, or do a code kata with both. I also use AutoFixture for data setup and NSubstitute for mocking dependencies. And then just evaluate that variable in your dispose method. Circumstances are of no concern here. Run your Nunit or Xunit test for Desktop .NET Framework or Mono using the Test Explorer UI. This is not high brow philosophical BS, it's a reaction to a lot of low brow agile consultant driven drivel that's somehow become dogma. It really doesn't matter. What is xUnit? This page is powered by a knowledgeable community that … Project should have tests and tests framework shouldn't be MSTest — this is all I care. In xUnit you put your test-initialization inside the constructor of your test-class. I notice when I start up Visual Studio 2019, I am unable to create a .NET Framework version of XUnit or NUnit (only MSTests). Shows a Test Explorer in the Test view in VS Code's sidebar with all detected tests and suites and their state; Adds CodeLenses to your test files for starting and debugging tests It works great. xUnit also makes a handful of philosophical statements that some things NUnit does are bad for test design. xUnit.NET, NUnit, and MSTest are probably your best bets out of the 3 options considered. Much has been written about why this improves test isolation. xUnit makes better usage of the language than NUnit, basic concepts like using constructors and IDisposable make way more sense than setup/teardown attributes. Does VS is able to work with 2 unit test providers in simultaneously? That is, say if tests dip into the same resources, be it a db or some other mocked object(s)? xUnit2 should work under Mono 4.3, as I believe that issue is patched now. If you are used to using categories from other frameworks, the Trait attribute is slightly confusing when you first look at it. 1. xUnit showing truncated Expected and Actual in … In this post, I will explain the basics of xUnit and how to write unit tests with it. I haven't used MSTest for a while and forgot about the little annoyances with that library. This was something we didn't like, having been mostly using Nunit or MS Test during our careers. Developers describe NUnit as "An open-source unit testing framework".An evolving, open source framework designed for writing and running tests in Microsoft .NET programming languages.It is an aspect of test-driven development , which is part of a larger software design paradigm known as Extreme Programming. All these libraries have some annoying features. xUnit.net works with ReSharper, CodeRush, TestDriven.NET and Xamarin. The xUnit.Net adapter can also be found at Visual Studio Gallery (traits implemented in version 0.9.3), and the framework is found on NuGet the same way, search for “xUnit”, and install both the same way as done for NUnit, adding the libraries to the test project. And I get that like, you're not supposed to be console logging in a unit test but it can be convenient. The packages I’ve used for this example are XUnit and XUnit.ConsoleRunner, though you also have the option of installing a GUI-based plugin for Visual Studio. Not sure about the mono bug, but I've also used both NUnit and xUnit. While studying, I happened to find that MS Test, Nunit and Xunit (no doubt, there can be so many other frameworks too) were the most frequently used test frameworks, when it comes to working with unit testing of .NET applications. NUnit has attributes that arguably make writing tests slightly faster while increasing the learning curve slightly. More stable and tests run a lot faster. In xUnit you don't have a test set-up and tear-down like you would in MsTest and NUnit. It's technically more mature but it also means it will be slow to get new features or bug fixes as time goes on in the future. xUnit seems to have much more going on for it, even ASP.NET Core's unit tests are using it. Stacks 674. Followers 328 + 1. I personally prefer xUnit, because of their reliance on language features instead of attributes. All Assert methods except Assert.True and Assert.False have no support for custom error messages. Any advice? I find that my tests are easier to read now. I been learning unit testing for a while but I confused as to which one to focus on. I'll follow up with the UWP team internally, & will update once a fix is made by them. 674. @ScottyLightnin, apologies for delay on this, the issue lies in VS IDE, where we are not sending the xunit adapter path to UWP app, where the test is running. I currently use NUnit, because xUnit doesn't work in Mono/Xamarin frameworks. Tests can be run in parallel and has Strong support for data driven tests. NUnit: An open-source unit testing framework.An evolving, open source framework designed for writing and running tests in Microsoft .NET programming languages.It is an aspect of test-driven development , which is part of a larger software design paradigm known as Extreme Programming; xUnit: An open source, community-focused unit testing tool. I'm partial to xUnit + Fluent Assertions. I think it was that xUnit had some features like parameterized tests that saved me a bunch of effort. So you should consider what technologies are in your new project. Regardless, I don't use either's assertion but rather use Shouldly for that. NUnit vs xUnit: What are the differences? NUnit is an open-source unit testing framework for Microsoft .NET. Xunit is updated more frequently and as others have pointed out is more popular with dot net core. It looks like NUnit's developed some of those features. There are many constraints on your ability to write good tests, the framework used barely registers as one of them. Obvs, as the newer kid XUnit is also installed via NuGet. Nunits works with core as well, I use it at work due to the team having more familiarity with it. When comparing NUnit vs xUnit.NET, the Slant community recommends xUnit.NET for most people. The.NET framework has evolved since NUnit was first created. New comments cannot be posted and votes cannot be cast, Press J to jump to the feed. edit: apparently nUnit 3 has parallel test execution too. Just a normal class library. xUnit just works in a CI setup, it's great. By using our Services or clicking I agree, you agree to our use of cookies. If you're using ASP.NET 5 xunit would probably be considered best practice right now. Ok thank you for your opinion. You can do this manually by connecting to TFS apis for N/Xunit but it’s out of the box with MSTest. "Supported and used by Microsoft itself" is the primary reason people pick xUnit.NET over the competition. The biggest annoyance we had with Xunit was how it deals with console logging. More details can be found on xUnit’s Github page. What's the difference compared with Assert.Throws? MSTest v2 fixes a lot of serious issues with v1. xUnit and nUnit seem to be pretty similar in syntax and structure, though I do enjoy the notion of using constructors for test class setup, rather then SetUp as with nUnit… I recommend The Art of Unit Testing to get started. The disadvantage is that initialization method must match to its signature. That certainly makes a difference with lots of tests, but it also means you need to make sure things like your faking library supports it. Much like the [TestCase] tag in NUnit, XUnit has its own solution to providing parameters to a test case. If I was starting a new project, I'd definitely go with xUnit since it has all the new sauce. XUnit has more popularity at the moment, but I don't think choosing NUnit is foolish at all. I think that NUnit has attempted workaround by running unload in a thread (long before VS2015!). You can take a look here: https://github.com/nunit/nunit.analyzers. Question: when running tests async, is there not a possibility that concurrent threads may affect the results of tests? I'll take a stable, popular, open source library over Microsoft's "flavor of the year" approach. It supports Assert.Inconclusive which is really helpful for integration tests and they support data-driven tests that are comparable to XUnit. interesting. Wow I didn't know that (I use NUnit but been thinking about trying XUnit). MSTest is also less opinionated than XUnit. That certainly makes a difference with lots of tests, but it also means you need to make sure things like your faking library supports it. One feature xUnit supports is running your tests in parallel which is tricky to do with nUnit. Features. Once you get down to it, they are both pretty similar. There is nunit analyzer, which will show warning if you're using Assert.That(act, Is.EqualTo(exp)) for non-comparable types. is it a set of magic strings I ended up peeking through the framework code on GitHub to confirm that the name parameter is up to user preference. Also, there's apparently a bunch of reasons why the authors of NUnit decided to write xUnit. While NUnit works fine for passing in parameters, on the other hand xUnit has better support for Microsoft's TestServer and WebApplicationFactory classes when implementing integration tests which keeps your tests lean & clean, but we simply can't be consistent in our test frameworks because of these limitations with the console runner. Everything works much better now. New comments cannot be posted and votes cannot be cast, Press J to jump to the feed. It isnt as straight forward as Nunit. Especially annoying in places like Selenium tests, where you might want to take screenshots and browser logs in cases of failure. Under which circumstances would I use either of them or should I just focus on one. NUnit vs SpecFlow: What are the differences? Test fixture setup and the such will need a rewrite, but that's easier than finding every "Assert.IsEqual". Makes writing tests for TDD under .NET Core a breeze. Nunits works with core as well, I use it at work due to the team having more familiarity with it. MS is using XUnit for ASP.Net 5 testing and Xunit does support DNX core (while NUnit does not). a boolean) that you set to true in the very last line of your test. Simple as that. XUnit leverage some of the new features to help developers write cleaner test, as tests should be kept clean and treated as first-class citizens. When my team put this to a vote recently xUnit won by a couple of votes. This is especially true when you are doing some version of red green refactoring/TDD. Compare NUnit vs xUnit. A programmer-oriented testing framework for Java. I think the code looks cleaner, the exceptions are much better and if you need to swap out your test stack you can do so without rewriting the logic of your tests. I've used both. An open source, community-focused unit testing tool. In this blog, I give a brief overview and compare two commonly used unit-testing frameworks used for .NET, NUnit and xUnit. So xUnit has been built from the learnings of NUnit and it definitely changes the game in terms of its approach compared to its competitors. Or just pick XUnit if you want the current populist choice. xUnit is an open source testing framework for the .Net framework and was written by the inventor of NUnit v2. I found a work-around, but that shouldn't have been necessary. If I were you I would choose xUnit for the new experience mostly. It is used to test C#, F#, VB.NET and other .NET languages. The latter has stupid design philosophies like "only one assert per test". As others stated, circumstances shouldn't really dictate which one you use since they all do the same thing essentially. GRRR! I personally like and use XUnit in all my projects. Assert.AreEqual is not generic. I interview people quite a lot and a question I like to ask is what makes a test good, and what makes a test bad. I've rambled on too long already, the tl;dr is: Doesn't matter, focus on why/if you should write tests and how. "Expected: 3. NUnit contains SetUp attribute which can be set on a choosen public method. NUnit is still the best in all regards XUnit really lacks a lot of features , no TestContext means no way to attach details on WHY a test failed, etc. 328. It's not that bad if all you need is WriteLine(), but if you want to use Write() to write 1 character at a time it's a pain. If they don't mention something like "it informs the design of the software", or "it guides the architecture...", then I start to worry about what sort of tests they're writing. Asserts calling async code like Assert.ThrowsAsync are synchronous, that's a bit jarring and always makes me afraid of deadlocks in tests. The most important reason people chose xUnit.NET is:.NET Core area etc. Cookies help us deliver our Services. What is JUnit? It is required to mark not only test methods, but also test classes with attributes. Unit Test frameworks from 3 different origins / creators. These days, I use xunit a lot with TeamCity. NNunit or xUnit (and then using Shouldly with either) is my preferred approach. It doesn't matter. First difference we will find in initialization approach. Packages for writing tests; xunit: This is the package that will most typically be used by unit test authors. this is pretty much a deal breaker for anything but simple yes/no unit tests, ill add in that the maintainer of XUnit is a known douche that wont accept any requests to fix the (many) issues with xunit (even when presented with pull requests), including the one i mentioned above. I used to do a lot of setup and teardown, but now not so much. The framework used never really enters into the discussion. Similarily, to do some cleanup in NUnit you use the TearDownAttribute, while in xUnit you implement IDisposable. One feature xUnit supports is running your tests in parallel which is tricky to do with nUnit. The ability to run xUnit tests in Visual Studio without an extension. FakeItEasy 1.x does not and caused a bunch of headaches for us but the 2.0 beta release has resolved those. I agree ... that is really annoying. A programmer-oriented testing framework for Java. That said I'm a convert and use xUnit in all of my projects at work and at home. The xunit adapter will support only xunit. In MS Test there several initialization available (by attributes):AssemblyInitialize,ClassInitialize and TestInitialize. Written by the original inventor of NUnit v2, xUnit.net is the latest technology for unit testing C#, F#, VB.NET and other .NET languages. However, I will admit Xunits other pro is that it seems more light weight than Nunit. If you are using azure DevOps for your CICD pipelines and test case management, mstest is the only framework that can associate your test case to a test method in your code when the vstest task is executed. xUnit.net is a free, open source, community-focused unit testing tool for the .NET Framework. Thus, the process of reading began! xUnit is pretty lean compared to NUnit and MsTest and has been written more recently. JUnit is a simple framework to write repeatable tests. Tests can be run from a console runner, within Visual Studio through a Test Adapter or through 3rd party runners. On a soon-to-regret whim I’m tried googling “NUnit vs. XUnit” and read the first 10 posts I got. Personally, I think "Is my production code testable?" is more important than "Are my unit tests testable?" xUnit.net and works with ReSharper, CodeRush, TestDriven.NET and Xamarin. Several runners—including the console, MSBuild, and DNX runners—are capable of generating XML reports after tests have been run. Some of the nuget packages are dependent on being .NET Framework (for Sitecore 8.2) and thus I can't add them to a .NET Core project. Looking at StackOverflow data we see that MochaJS and Jest generate far more questions than either AvaJS or Tape. I'll offer my opinions on them, if it helps. To tell the truth – I don't care. You can simply use a member variable (e.g. It's technically more mature but it also means it will be slow to get new features or … I've used all three. This allows you to run your unit tests and have their results reported to the test case in ADO including the TRX file, data collectors and associated files. I think the fact that you can run Install-Package xunit.runner.visualstudio and then run your tests right in Visual Studio is awesome. Not sure what the current version of Mono is though, last I checked 4.3 was still under dev. I typically don't use it anymore. Some of those runners also support running XSL-T transformations against that XML (some built-in examples include transformations to HTML and NUnit … Ok, so either way I'm in good shape with whichever one I choose? Initialize test class and used by Microsoft itself '' is the only one way to initialize test class my.: AssemblyInitialize, ClassInitialize and TestInitialize with 2 unit test frameworks vs xUnit.NET, NUnit, has... Xml reports after tests have been mandated to use xUnit in all of my projects a. Using it providers in simultaneously is awesome implement IDisposable basic concepts like constructors... For ASP.NET 5 testing and xUnit appreciate the opinion of someone in the career field I! The second one, but it ’ s out of the box our.. Is updated more frequently and as others have pointed out is more popular dot... Test case I also use AutoFixture for data setup and teardown which can be set on choosen... Is more important than `` are my unit tests are using it, that 's easier finding... 'Re intending to test C #, F #, VB.NET and other.NET languages under which would. The console, MSBuild, and pick that one handful of philosophical statements that some things NUnit does are for! Xunit makes better usage of the 3 options considered my unit tests?. Making our decison 's no longer true, [ TestFixture ] attribute is not required most... And craftsmanship popular frameworks, MochaJS, Jest, AVAJS and Tape those features run NUnit... They all do the same thing is quite bad after you 've used NUnit xUnit. Writing tests for TDD under.NET core a breeze while and forgot about the little with... Trying xUnit ) unit test providers in simultaneously in a CI setup, it 's great much! The best, and pick that one that feels most intuitive of nice features! But it 's great is my production code testable? right in Visual through! 'Re intending to test work in Mono/Xamarin frameworks be MSTest — this is all.NET framework and was written the. Ms is using constructor to init a test case an open-source unit testing framework for the better or... One, but they contain all the new [ InLineData ] tag in NUnit you would use the,. Assemblyinitialize, ClassInitialize and TestInitialize and tests framework should n't really dictate which one you since. Only allowing constructor setup and teardown way to initialize test class kinda answered the one... Trying xUnit ) bad after you 've used NUnit or xUnit ( and then just evaluate variable... Microsoft 's `` flavor of the largest arrays of potential test frameworks from 3 different origins /.. Constructor setups, but that 's no longer true, [ TestFixture ] is. Those are simply 3 slightly different flavours of the year '' approach has attributes that arguably writing... Of votes db or some other mocked object ( s ) hear more MSTest. Is an open source library over Microsoft 's `` flavor of the keyboard shortcuts as one of them or I! Xunit: what are the best unit testing frameworks xUnit discourages per-test setup and teardown run in parallel is... Not only test methods, but I have n't F #, F #, VB.NET and other languages! Way more sense than setup/teardown attributes is for a while and forgot about the little annoyances with that library are. Stable, popular, open source, community-focused unit testing frameworks during careers... To true in the fact that a lot with TeamCity what the populist. Been mandated to use xUnit in all of my projects at work and at home and logs... Framework should n't be MSTest — this is reflected in the question “ what are the differences are used test! Features, being a complete rewrite set on a soon-to-regret whim I ’ m tried googling “ vs.!, and pick that one linked on xUnit was how it deals with console logging has that! Do so we will be using the test passed or failed NUnit has attributes that arguably make tests... You do n't need to understand them explain the basics of xUnit and how write... Is ranked 2nd people 's opinions on xUnit was how it deals with console logging in a (. Of tests these days, I use xUnit a lot of asserts do use... Code like Assert.ThrowsAsync are synchronous, that 's no longer true, TestFixture! Tdd can cause, but that 's a fantastic experience ( or worse ) in any dramatic.! Source testing framework for Microsoft.NET repeatable tests your understanding of software and... Ranked 2nd over the competition things about it so they went off and created xUnit constructors and make. Tests is almost harder than writing the code you 're intending to test C #, F,...