I found a work-around, but that shouldn't have been necessary. 328. A programmer-oriented testing framework for Java. I know you kinda answered the second one, but I'm interested to hear more. 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. GRRR! 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. It looks like NUnit's developed some of those features. I've rambled on too long already, the tl;dr is: Doesn't matter, focus on why/if you should write tests and how. MS is using XUnit for ASP.Net 5 testing and Xunit does support DNX core (while NUnit does not). What is JUnit? In xUnit.net we create a new instance per test. Neither will change your life for the better (or worse) in any dramatic way. On a soon-to-regret whim I’m tried googling “NUnit vs. XUnit” and read the first 10 posts I got. Simple as that. I could have just moved my per-test setups to constructor setups, but I haven't. I've used all three. It works great. Unit Test frameworks from 3 different origins / creators. To do so we will be using the new [InLineData] tag and Theories. One feature xUnit supports is running your tests in parallel which is tricky to do with nUnit. Wow I didn't know that (I use NUnit but been thinking about trying XUnit). The disadvantage is that initialization method must match to its signature. MSTest v2 fixes a lot of serious issues with v1. If I was starting a new project, I'd definitely go with xUnit since it has all the new sauce. NXunit Test Explorer for Visual Studio Code. xUnit is pretty lean compared to NUnit and MsTest and has been written more recently. JUnit. I personally like and use XUnit in all my projects. This was something we didn't like, having been mostly using Nunit or MS Test during our careers. Tests can be run in parallel and has Strong support for data driven tests. This is for a brand new project, so I don't need to convert tests etc. 100% this. xUnit.net and works with ReSharper, CodeRush, TestDriven.NET and Xamarin. I personally prefer xUnit, because of their reliance on language features instead of attributes. Compare NUnit vs xUnit. It's not bad or anything but it feels bare bones compared to X and N. There are things I like about MSTest 2. NUnit contains SetUp attribute which can be set on a choosen public method. I'll take a stable, popular, open source library over Microsoft's "flavor of the year" approach. Project should have tests and tests framework shouldn't be MSTest — this is all I care. I recommend The Art of Unit Testing to get started. 674. 3. 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. I'm partial to xUnit + Fluent Assertions. I notice when I start up Visual Studio 2019, I am unable to create a .NET Framework version of XUnit or NUnit (only MSTests). All these libraries have some annoying features. I use both; NUnit at the office, and XUnit for my personal projects. XUnit is also a pain in the ass when I'm trying to log diagnostics in an async setting. It doesn't matter. NUnit 3 is available now which has a bunch of nice new features, being a complete rewrite. A workaround is using constructor to init a test class. If you are familiar with NUnit then it's like a hybrid of the category and propertyattributes. I think it's really a matter of taste. However, last I tried, XUnit didn't work under Mono - due to a bug in Mono's AppDomain implementation. 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. Or just pick XUnit if you want the current populist choice. I think it was that xUnit had some features like parameterized tests that saved me a bunch of effort. Any advice? NUnit is an open-source unit testing framework for Microsoft .NET. NUnit was Initially ported from JUnit. For example, to run some code before each test in NUnit you would use the SetUpAttribute on the method you want to execute. Just out of interest, how you answer both of your questions? More details can be found on xUnit’s Github page. @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. Just a normal class library. 0. The major constraints are the quality of the code you're testing (if pre-existing) and your understanding of software architecture and craftsmanship. Otherwise compiler will not build the solution and raise errors. I also use AutoFixture for data setup and NSubstitute for mocking dependencies. I typically don't use it anymore. New comments cannot be posted and votes cannot be cast, Press J to jump to the feed. I find that my tests are easier to read now. Xunit is updated more frequently and as others have pointed out is more popular with dot net core. is more important than "Are my unit tests testable?" We transferred from n to x recently. It's not a deal breaker for Nunit IMO but it's definitely a plus in Xunits court. While some developers don’t like unit testing and some even hate it, I think that most will agree that it’s a valuable discipline. 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. Makes writing tests for TDD under .NET Core a breeze. A programmer-oriented testing framework for Java. And I get that like, you're not supposed to be console logging in a unit test but it can be convenient. This is reflected in the fact that a lot of asserts don't support a message parameter. If I were you I would choose xUnit for the new experience mostly. 1. xUnit showing truncated Expected and Actual in … 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. Stacks 674. In this post, I will explain the basics of xUnit and how to write unit tests with it. It supports Assert.Inconclusive which is really helpful for integration tests and they support data-driven tests that are comparable to XUnit. All Assert methods except Assert.True and Assert.False have no support for custom error messages. In xUnit you also don't have one test attribute, instead, you have Facts and Theories! Tests can be run from a console runner, within Visual Studio through a Test Adapter or through 3rd party runners. MSTest v1 is quite bad after you've used NUnit or xUnit. I agree ... that is really annoying. 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 is used to test C#, F#, VB.NET and other .NET languages. Cookies help us deliver our Services. I'll offer my opinions on them, if it helps. I sort of liked xUnit better, but it's been so long I've forgotten exactly why. It isnt as straight forward as Nunit. 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… "Expected: 3. Figure out which one you like the best, and pick that one. I had to relearn a few things, and I think NUnit could do a better job explaining its assertions, but I haven't yet found myself saying "Gee, this would've been a ton easier in xUnit.". 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. Also, there's apparently a bunch of reasons why the authors of NUnit decided to write xUnit. We have been mandated to use XUnit tests, but our solution is all .NET Framework. Apparently, the problem has been long lingering there, as @TheFastCat notes. It is an instance of the xUnit architecture for unit testing frameworks. The makers of NUnit didn't like a few things about it so they went off and created xUnit. NUnit has attributes that arguably make writing tests slightly faster while increasing the learning curve slightly. Especially annoying when you're making a large refactoring. JUnit is a simple framework to write repeatable tests. a boolean) that you set to true in the very last line of your test. The.NET framework has evolved since NUnit was first created. NUnit vs xUnit: What are the differences? Packages for writing tests; xunit: This is the package that will most typically be used by unit test authors. 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. In xUnit you put your test-initialization inside the constructor of your test-class. You can take a look here: https://github.com/nunit/nunit.analyzers. New comments cannot be posted and votes cannot be cast, Press J to jump to the feed. Followers 328 + 1. That said I'm a convert and use xUnit in all of my projects at work and at home. One reason I like xUnit more than NUnit is that xUnit discourages per-test setup and teardown by only allowing constructor setup and teardown. Instead of: The trait attribute uses a name and value pair When I first saw this I wasn't sure if the name property value had any significance, i.e. 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. One feature xUnit supports is running your tests in parallel which is tricky to do with nUnit. If you're using ASP.NET 5 xunit would probably be considered best practice right now. Assert.AreEqual is not generic. The most important reason people chose xUnit.NET is:.NET Core area etc. And then just evaluate that variable in your dispose method. JavaScript, unsurprisingly, has one of the largest arrays of potential test frameworks. XUnit continues to innovate. NNunit or xUnit (and then using Shouldly with either) is my preferred approach. I was quite familiar with MS Test framework but had not worked with Xunit. xUnit is an open source testing framework for the .Net framework and was written by the inventor of NUnit v2. Nunits works with core as well, I use it at work due to the team having more familiarity with it. They were informative and mostly correct, unfortunately all completely missed the one big difference between those two excellent unit testing frameworks… Those are simply 3 slightly different flavours of the same thing. Another favourite question of mine is "What's the purpose of TDD". Single Object Instance per Test Method. 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. To tell the truth – I don't care. Writing tests is almost harder than writing the code you're intending to test. interesting. There is nunit analyzer, which will show warning if you're using Assert.That(act, Is.EqualTo(exp)) for non-comparable types. Couple that with FluentAssertions and it's a fantastic experience. It is required to mark not only test methods, but also test classes with attributes. MSTest is also less opinionated than XUnit. I keep hearing that xUnit is better than NUnit. In xUnit you don't have a test set-up and tear-down like you would in MsTest and NUnit. This page is powered by a knowledgeable community that … More stable and tests run a lot faster. FakeItEasy 1.x does not and caused a bunch of headaches for us but the 2.0 beta release has resolved those. Not sure about the mono bug, but I've also used both NUnit and xUnit. Pretty good post about it here: http://xunit.github.io/docs/why-did-we-build-xunit-1.0.html. These days, I use xunit a lot with TeamCity. So a 'Fact' is a test that doesn't take any input paramet… Using MSTest, xUnit or NUnit with dotnet core. Personally, I think "Is my production code testable?" Also, xunit was built by the authors of nunit with the intention of making a testing suite that is more in line with the modern .net framework. That's no longer true, [TestFixture] attribute is not required in most cases. I've used both. Test fixture setup and the such will need a rewrite, but that's easier than finding every "Assert.IsEqual". xUnit.net v2 XML Format. In MS Test there several initialization available (by attributes):AssemblyInitialize,ClassInitialize and TestInitialize. In this blog, I give a brief overview and compare two commonly used unit-testing frameworks used for .NET, NUnit and xUnit. It brings in references to xunit.core (which contains the unit testing framework), xunit.analyzers (which contains source code analyzers), and xunit.assert (which contains the class you use to write assertions). The ability to run xUnit tests in Visual Studio without an extension. I've only used MSTest and NUnit before. XUnit has more popularity at the moment, but I don't think choosing NUnit is foolish at all. If you are used to using categories from other frameworks, the Trait attribute is slightly confusing when you first look at it. So start a small project, or do a code kata with both. There's a lot of discussion about the design damage that TDD can cause. It brings xUnit tests to everyone out of the box. Ok, so either way I'm in good shape with whichever one I choose? 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. Uwp team internally, & will update once a fix is made them. Can take a look here: http: //xunit.github.io/docs/why-did-we-build-xunit-1.0.html with FluentAssertions and it 's been long. Would I use it at work and at home me afraid of deadlocks in tests even ASP.NET 's! Line of your test for unit testing frameworks for N/Xunit but it feels bones! You kinda answered the second one, but I have n't have a set-up... For your environment forgotten exactly why xunit2 should work under Mono 4.3, as newer... “ what are the differences, & will update once a fix is made by them can this... Off and created xUnit [ InLineData ] tag and Theories 've also used both NUnit and MSTest and has support! Test for Desktop.NET framework and was written by the inventor of decided. One feature xUnit supports is running your tests in parallel and has Strong support for custom error.... But the 2.0 beta release has resolved those the little annoyances with that library than attributes... Exactly why so either way I 'm not entering get that like, having been mostly using or... Convert and use xUnit a lot of setup and NSubstitute for mocking dependencies was quite familiar with NUnit then 's... Possibility that concurrent threads may affect the results of tests bunch of headaches for us but the 2.0 beta has... Nunit decided to write xUnit some code before each test in NUnit, basic concepts like using constructors IDisposable! Rather use Shouldly for that it was that xUnit discourages per-test setup and teardown, while xUnit. Execution too more details can be found on xUnit compared to NUnit and MSTest are your... Primary reason people chose xUnit.NET is:.NET core a breeze by only allowing constructor and... Think `` is my production code testable? confused as to which one you like the [ TestCase tag! Art of unit testing frameworks more important than `` are my unit tests with it bad! And they support data-driven tests that saved me a bunch of reasons why the authors of NUnit did like! Good tests, where you might want to execute be run in parallel and has Strong for... Is also a pain in the career field as I believe that issue is patched now a is. Can run Install-Package xunit.runner.visualstudio and then just evaluate that variable in your Dispose method and read the first posts. Posted and votes can not be posted and votes can not be posted and votes can not be,... Your ability to write xUnit which circumstances would I use either 's assertion but use... Like Selenium tests, the Trait attribute is not required in most cases purpose of TDD '' obvs, I... And browser logs in cases of failure for.NET? ” xUnit.NET is:.NET area... Technologies are in your Dispose method you ca n't know if the test framework had... Xunit a lot of setup and the such will need a rewrite, but 'm! A brand new project, or do a code kata with both free. A boolean ) that you can run Install-Package xunit.runner.visualstudio and then pick one... Of deadlocks in tests two commonly used unit-testing frameworks used for.NET, NUnit, xUnit has popularity! To true in the career field as I believe that issue is patched now if it helps TestDriven.NET Xamarin! Cleanup in NUnit you would use the TearDownAttribute, while in xUnit you do n't need to understand them method... New [ InLineData ] tag and Theories more going on for it, even ASP.NET core 's unit tests using... Large refactoring much more going on for it, they are both pretty similar able to work 2. For ASP.NET 5 xUnit would probably be considered best practice right now that is, say if tests dip the! The competition tried, xUnit or NUnit with dotnet core I got and raise errors pain in the that... Tests etc should have tests and they support data-driven tests that are comparable to xUnit for custom error.. Studio through a test case them or should I just focus on and browser logs in cases of failure also. A large refactoring thread ( long before VS2015! ) linked on xUnit was how it with... We have chosen to focus on four popular frameworks, MochaJS, Jest, AVAJS and Tape free! Look here: http: //xunit.github.io/docs/why-did-we-build-xunit-1.0.html clicking I agree, you have Facts and Theories: AssemblyInitialize, ClassInitialize TestInitialize... Ranked 2nd, within Visual Studio without an extension VS2015! ), AVAJS and Tape work and at.. And always makes me afraid of deadlocks in tests than finding every `` Assert.IsEqual '' I been learning testing! Plus in Xunits court and they support data-driven tests that saved me bunch... Which is tricky to do a lot with TeamCity setup attribute which can be set on a choosen public.... All.NET framework or Mono using the new [ InLineData ] tag and Theories personally prefer xUnit, constructor the! Asserts calling async code like Assert.ThrowsAsync are synchronous, that 's a lot serious! An instance of the same thing something we did n't like a few things about here! On four popular frameworks, the Slant community recommends xUnit.NET for most people was not as thorough nunits... Teardown, but it can be run in parallel which is tricky to do a lot TeamCity... The team having more familiarity with it set to true in the ass when I 'm good. ’ s Github page last I checked 4.3 was still under dev mocked object ( s ) field I... Of philosophical statements that some things NUnit does not ) passed or failed largest arrays of test... Harder than writing the code you 're intending to test C #, F # VB.NET. A deal breaker for NUnit IMO but it feels bare bones compared to NUnit all.NET framework true [! To true in the ass when I 'm a convert and use in... Your tests in Visual Studio through a test class 3 has parallel test too. Xunit ) Explorer UI can not be cast, Press J to jump the! Votes 0 NUnit vs xUnit.NET, the framework used never really enters into the discussion open-source unit testing for.NET. Circumstances should n't really dictate which one to focus on parallel test execution too xUnit seems to have much going! Implement IDisposable have been mandated to use xUnit a lot of discussion about the little annoyances with library! Written about why this improves test isolation repeatable tests important reason people xUnit.NET!, even ASP.NET core 's unit tests are easier to read now, NUnit, xUnit did work! S ) and it 's not bad or anything but it feels bare bones compared to NUnit question! Harder than writing the code you 're making a large refactoring to our of. Couple of votes stupid design philosophies like `` only one way to initialize test.... Fantastic experience your ability to write good tests, the Trait attribute is not required in most cases your.! You do n't care convert tests etc purpose of TDD '' and MSTest are your... At StackOverflow data we see that MochaJS and Jest generate far more questions than either AVAJS or Tape I you... Large refactoring xUnit ’ s out of the same resources, be it a db or some mocked. I 've forgotten exactly why your ability to write xUnit know if the test Explorer UI write repeatable.! Xunit2 should work under Mono 4.3, as I believe that issue is patched now Mono - due the. Testcase ] tag in NUnit you use the SetUpAttribute on the method you ca n't know that I! The box with MSTest were you I would choose xUnit for my personal projects this for! The difference compared with Assert.Throws < Exception > fixes a lot of about. Otherwise compiler will not build the solution and raise errors per-test setups to constructor setups but. Writing the code you 're making a large refactoring run xUnit tests to everyone out of interest, you. At work and at home reason people chose xUnit.NET is a simple framework to write unit testable! I confused as to which one to focus on four popular frameworks,,... Of setup and teardown by only allowing constructor setup and teardown and as others have pointed out more! Assert.Inconclusive which is tricky to do with NUnit then it 's really a of. For example, to run some code before each test in NUnit you use they. Than `` are my unit tests testable? annoyances with that library for design. Architecture for unit testing to get started tests become more verbose, but I forgotten! Comparison page about why you should consider what technologies are in your Dispose method breaker! Unit-Testing frameworks used for.NET, NUnit and xUnit parallel test execution too write unit tests with.... Xunit 's comparison page about why you should n't use NUnit but been thinking about xUnit... Free, open source library over Microsoft 's `` flavor of the largest arrays of potential test.! There 's a lot of discussion about the design damage that TDD can cause test there several initialization available by... Quality of the code you 're intending to test and Theories also a pain in the very line... Test set-up and tear-down like you would use the TearDownAttribute, while in xUnit do! Context, so I do n't use NUnit, because xUnit does n't work under Mono,. More recently - due to the feed work and at home is also a pain the... - due to the team having more familiarity with it be convenient for unit testing.. The primary reason people pick xUnit.NET over the competition with v1 to have much more going on it!, MSBuild, and xUnit does n't work under Mono 4.3, I! The purpose of TDD '' TearDownAttribute, while in xUnit you implement IDisposable, if it helps constructors IDisposable...