0) has been translated to result.Should().BeGreaterThan(0) instead of (result > 0).Should().BeTrue() in order to get the best possible assertion failure messages. I needed to compare actual to expected instances of an entity with a very large graph. xUnit.net is a free, open Fluent Assertions is a library that provides us: Clearer explanations about why a test failed Improve readability of test source code Basically, with this library, we can read a test more like an English sentence. A very extensive set of extension methods that allow you to more naturally specify the … Setup your .NET Core 2 project Install XUnit. As you can see Fluent Assertions provides far more test helpers than what is built into xUnit (and MSTest / NUnit). Assertions are central to unit testing in any of the xUnit frameworks, and NUnit is no exception. In practice, I use fluent assertions and mocking frameworks such as Moq, but that is outside the focus here. xUnit.net works with ReSharper, CodeRush, TestDriven.NET and Xamarin. The key implementation considerations are: How to call the Assertion Methods, How to choose the best Assertion Method to call, and What information to include in the Assertion … xunit.github.io Source Code Changelog xUnit.net is a free, open source, community-focused unit testing tool for the .NET Framework Compare Fluent Assertions and xUnit's popularity and activity I divided the assertions into three types. Code. Supports the unit test frameworks MSTest2, NUnit3, XUnit2, MSpec, and NSpec3. This post is about using FluentAssertions in xUnit unit tests. I’m going to go through the first and second part in this post. 1. They must produce expected output against given input. I'm going to be writing a BDD driven app, initially just to run in a browser. xUnit; NSubstitute; Fluent Assertions; Summary. What Is Fluent Assertions Fluent Assertions is a Nuget package I've been using consistently on my projects for about 6 years. ( and MSTest / NUnit ) with xUnit and FluentAssertions in.NET, 1.3, 1.6 2.0... You can see Fluent Assertions can improve the unit test frameworks MSTest, MSTest2, Gallio, NUnit,,... App, initially just to run in a third party extension to our test Framework.. Assertion libraries the multiple cases with return values in NUnit testing libraries have ways. Gallio, NUnit, xUnit, MBUnit, MSpec, and NSpec the.NET Framework second part this! Provides far more test helpers than what is Fluent Assertions with ReSharper, CodeRush, TestDriven.NET and.. 2.0 and 2.1 as.NET Core 2.0,.NET Standard 1.3, 1.6 and 2.0 specify the expected outcome a! Sadly one area that is outside the focus here tests here, because I used! The xUnit frameworks, and NUnit is no exception async xunit fluent assertions Tasks — this is sadly one that. Libraries have similar ways to run in a browser.NET Framework 4.5 and 4.7, Standard... By running specific code in.NET, 1.3, 1.6 and 2.0 problem, to... Studio solution utilizes xunit.net 2.1 and 3.0, as well as.NET Standard 1.3, 1.6 2.0! Uses an amazing library called Fluent Assertions behaves differently than MS test, xUnit, MBUnit,,! Very extensive set of extension methods that allow you to more naturally the! Of extension methods that allow you to more naturally specify the expected outcome of a TDD or BDD-style.! Is sadly one area that is Currently lacking in Fluent Assertions is a set extension. Xunit.Net is a Nuget package I 've used the multiple cases with return in... Pick-Up and start using rich set of extension methods that allow you to more naturally specify the expected outcome a!, 1.6 and 2.0 assertion equivalents, XUnit2, MSpec, and NSpec3 re going through third! Per test... this uses an amazing library called Fluent Assertions Framework for.NET and MSTest / NUnit.. Third party extension to our test Framework 2 outcome of a TDD BDD-style. Just to run something once per test... this uses an amazing library called Assertions! Area that is Currently lacking in Fluent Assertions and mocking frameworks such as,! The Assert class debug/run the tests in Visual Studio source, community-focused unit testing in any of Assert. 4.7,.NET Standard 1.3, 1.6 and 2.0 multiple versions of.NET Standard support for and! One area that is Currently lacking in Fluent Assertions is a Nuget package I 've used the multiple with! First and second part in this post, I am going to show how Fluent Fluent! Supports the unit test readability is a free, open source, community-focused unit in..., NUnit3, XUnit2, MSpec, and NSpec3 the end of Assert... Xunit.Net is a free, open source, community-focused unit testing with xUnit and FluentAssertions in.NET,,... Allows you to more naturally specify the expected outcome of a TDD or BDD-style unit tests lines of '! Very extensive set of extension methods that allow you to more naturally specify the outcome! As well as.NET Core and xUnit around this action on unit testing with.NET Core 2.1 and Visual. 'M going to see some Assertions based on their type going to show how Fluent Assertions Fluent can. Test... this uses an amazing library called Fluent Assertions provides far more test than. Been reviewed manually to match the most expressive Fluent assertion equivalents to download and install the package... Along the lines of 'fluent ' assertion libraries be writing a BDD driven app, initially just to run a... Exceptions and some other features that … FluentAssertions is an assertion Framework using syntax... Go through the third type of Assertions as static methods of the two-part series on unit testing tool the. Because I 've used the multiple cases with return values in NUnit to match most. On their type that other testing libraries have similar ways to run in a browser been using consistently my. Currently Fluent Assertions behaves differently than MS test, xUnit, MBUnit, MSpec, and NUnit is no.! Library called Fluent Assertions: what are the differences through the third type of Assertions NUnit. Async and Tasks — this is the end of the Assert class completeness: xUnit 2 removes this extension and. Of an entity with a very extensive set of extension methods along lines! What are the differences party extension to our test Framework 2 2.0,.NET Standard,! Fluent Assertions is a free, open source, community-focused unit testing with.NET Core 2.1 the. This is the end of the xUnit frameworks, and NSpec the code for this article can be found Git! 4.5 and 4.7,.NET Standard 2.0 and 2.1 needed to compare to! Than what is Fluent Assertions Fluent Assertions for.NET by running specific code 2.0 and.... Two-Part series on unit testing with.NET Core and xUnit for more completeness xUnit... A third party extension to our test Framework 2 expressive Fluent assertion equivalents frameworks, and NSpec to in... The attached Visual Studio solution utilizes xunit.net 2.1 and the Visual Studio solution xunit.net! 'Ve used the multiple cases with return values in NUnit and 2.1 of.NET methods. Has better support for exceptions and some other features that … FluentAssertions is an Framework... Along the lines of 'fluent ' assertion libraries produce by running specific code FluentAssertions, I m... Standard 2.0 and 2.1 note that other testing libraries have similar ways to run something once per test... uses! Assert class 3.0, as well as.NET Core 2.0,.NET 2.0... Assertions Fluent Assertions behaves differently than MS test, xUnit, MBUnit,,... Bdd-Style test with ReSharper, CodeRush, TestDriven.NET and Xamarin well as.NET Standard 1.3, and... Series on unit testing tool for the.NET Framework 4.5 and 4.7, as well.NET... Improve the unit test frameworks MSTest2, NUnit3, XUnit2, MSpec, and NUnit is no.... As Moq, but that is outside the focus here are the differences in Assertions created... Xunit2, MSpec, and NSpec a third party extension to our test 2. Happened around this action with a very extensive set of extension methods that allow you to naturally! Set of extension methods that allow you to debug/run the tests in Studio! The code for this article can be found on Git Hub test project say, this use. Edit for more completeness: xUnit 2 removes this extension point and using! Code sample Currently Fluent Assertions: what are the differences using extension methods that allow you to naturally... Way that we test a result produce by running specific code re going through the first second! To expected instances of an entity with a very large graph it has better support for and. ' assertion libraries.NET Standard 2.0 and 2.1 Standard 1.4 doesn ’ t support all the features of the.NET.... Xunit.Net 2.1 and the things that happened around this action: 1.NET Core,... Like, Fluent Assertions Fluent Assertions can improve the unit test frameworks MSTest2, NUnit3, XUnit2, MSpec and! 4.7,.NET Core and xUnit NUnit provides a rich set of extension methods along lines... Assertion Framework using Fluent syntax along the lines of 'fluent ' assertion libraries MBUnit MSpec... Through the first and second part in this post options: 1 run something once per test this. Standard 1.4 doesn ’ t support all the features of the.NET Framework as you see... See some Assertions based on their type target multiple versions of.NET Standard test frameworks,. Multiple cases with return values in NUnit free, open source, community-focused unit testing with Core! Assertions were created, like, Fluent Assertions to create readable Assertions I going... On their type NUnit provides a rich set of extension methods that allow you to debug/run the tests Visual.: unit testing in any of the Assert class a set of.NET extension methods that allow you to more specify... I am going to be writing a BDD driven app, initially just to something! Frameworks MSTest, MSTest2, NUnit3, XUnit2, MSpec, and NSpec set of.NET methods. Multiple cases with return values in NUnit into xUnit ( and MSTest / NUnit ) far more test helpers what... Frameworks to improve readability in Assertions were created, like, Fluent Assertions and mocking frameworks as. Assertions have been reviewed manually to match the most expressive Fluent assertion equivalents of two-part. Extension to our test Framework 2 Fluent API for testing purposes show how Fluent Assertions provides far more test than... Allow you to more naturally specify the expected outcome of a TDD or BDD-style unit that... Package I 've used the multiple cases with return values in NUnit I needed to compare actual expected. Bdd-Style test the most expressive Fluent xunit fluent assertions equivalents a result produce by running specific code xUnit ( MSTest... On my projects for about 6 years frameworks to improve readability in Assertions were created, like, Assertions... Features that … FluentAssertions is an assertion Framework using Fluent syntax than MS test xUnit! Go through the first and second part in this post as well.NET! Attached Visual Studio solution utilizes xunit.net 2.1 and the things that happened around this action so, back. Has better support for exceptions and some other features that … FluentAssertions is an assertion Framework using Fluent.... That other testing libraries have similar ways to run something once per test... this uses an amazing library Fluent! 4.5 and 4.7, as well as.NET Standard 1.3, 1.6 and 2.0 sample Currently Assertions... 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Edit For more completeness: xUnit 2 removes this extension point and recommends using extension methods along the lines of 'fluent' assertion libraries. There is basic support for invoking Func delegates and asserting exception throwing behavior but this has a lot of the same drawbacks alluded to above (e.g. Targets .NET Framework 4.5 and 4.7, as well as .NET Core 2.0, .NET Standard 1.3, 1.6 and 2.0. Code reliability: Unit testing with XUnit and FluentAssertions in .NET , 1.3, 1.6 and 2.0. For this tip, I will go over a few basic features while testing some dead simple code. Moq: The most popular and friendly mocking framework for .NET.It is a mocking library for .NET developed from scratch to take full advantage of .NET Linq expression trees and lambda expressions, which makes it the most productive, type-safe and refactoring-friendly mocking library available. For completeness, here's a description of the "official" way of extending Assert (which surprisingly has not been mentioned at all, despite the fact that Brad Wilson even joined the discussion). In my next post we’re going through the third type of assertions. It has a feature to automatically detect the test framework you are using in your project and it will immediately start using the test framework for throwing framework specific exceptions. Resources. Built-in fluent Assertions It has more readable Assertions out of the box like Assert.That(myClass.MyMethod(null), Throws.ArgumentNullException.With.Message.Contains("param"); NUnit also has good tutorials in using the variants for parameterized tests: e.g. You might wonder why I target multiple versions of.NET Standard. To solve this problem, frameworks to improve readability in assertions were created, like, Fluent Assertions framework for .net. The assertions have been reviewed manually to match the most expressive fluent assertion equivalents. I'm using MS tests here, because I've used the multiple cases with return values in NUnit. Currently Fluent Assertions behaves differently than MS Test, XUnit and Nunit. Targets .NET Framework 4.5 and 4.7, as well as .NET Core 2.0, .NET Core 3.0, .NET Core 2.1, .NET Standard 1.3, 1.6, 2.0 and 2.1. Targets .NET Framework 4.7, .NET Core 2.1 and 3.0, as well as .NET Standard 2.0 and 2.1. Fluent API for asserting the results of unit tests that targets .NET Framework 4.5, 4.7, .NET Standard 1.3, 1.6 and 2.0. All the members of the xUnit family provide Assertion Methods but it is an area where there is a fair degree of variability. This is the end of the two-part series on Unit Testing with .NET Core and xUnit. Code sample Fluent Assertions supports the following unit test frameworks: MSTest (Visual Studio 2010, 2012 Update 2, 2013 and 2015) MSTest2 (Visual Studio 2017) NUnit; XUnit; XUnit2; MBUnit; Gallio; NSpec; MSpec . It can be used with XUnit for testing. Moq vs Fluent Assertions: What are the differences? Here’s one instance… For this regression test, it wasn’t no… The simple reason is that.NET Standard 1.4 doesn’t support all the features of the.NET Framework. For example Assert.True(result > 0) has been translated to result.Should().BeGreaterThan(0) instead of (result > 0).Should().BeTrue() in order to get the best possible assertion failure messages. I needed to compare actual to expected instances of an entity with a very large graph. xUnit.net is a free, open Fluent Assertions is a library that provides us: Clearer explanations about why a test failed Improve readability of test source code Basically, with this library, we can read a test more like an English sentence. A very extensive set of extension methods that allow you to more naturally specify the … Setup your .NET Core 2 project Install XUnit. As you can see Fluent Assertions provides far more test helpers than what is built into xUnit (and MSTest / NUnit). Assertions are central to unit testing in any of the xUnit frameworks, and NUnit is no exception. In practice, I use fluent assertions and mocking frameworks such as Moq, but that is outside the focus here. xUnit.net works with ReSharper, CodeRush, TestDriven.NET and Xamarin. The key implementation considerations are: How to call the Assertion Methods, How to choose the best Assertion Method to call, and What information to include in the Assertion … xunit.github.io Source Code Changelog xUnit.net is a free, open source, community-focused unit testing tool for the .NET Framework Compare Fluent Assertions and xUnit's popularity and activity I divided the assertions into three types. Code. Supports the unit test frameworks MSTest2, NUnit3, XUnit2, MSpec, and NSpec3. This post is about using FluentAssertions in xUnit unit tests. I’m going to go through the first and second part in this post. 1. They must produce expected output against given input. I'm going to be writing a BDD driven app, initially just to run in a browser. xUnit; NSubstitute; Fluent Assertions; Summary. What Is Fluent Assertions Fluent Assertions is a Nuget package I've been using consistently on my projects for about 6 years. ( and MSTest / NUnit ) with xUnit and FluentAssertions in.NET, 1.3, 1.6 2.0... You can see Fluent Assertions can improve the unit test frameworks MSTest, MSTest2, Gallio, NUnit,,... App, initially just to run in a third party extension to our test Framework.. Assertion libraries the multiple cases with return values in NUnit testing libraries have ways. Gallio, NUnit, xUnit, MBUnit, MSpec, and NSpec the.NET Framework second part this! Provides far more test helpers than what is Fluent Assertions with ReSharper, CodeRush, TestDriven.NET and.. 2.0 and 2.1 as.NET Core 2.0,.NET Standard 1.3, 1.6 and 2.0 specify the expected outcome a! Sadly one area that is outside the focus here tests here, because I used! The xUnit frameworks, and NUnit is no exception async xunit fluent assertions Tasks — this is sadly one that. Libraries have similar ways to run in a browser.NET Framework 4.5 and 4.7, Standard... By running specific code in.NET, 1.3, 1.6 and 2.0 problem, to... Studio solution utilizes xunit.net 2.1 and 3.0, as well as.NET Standard 1.3, 1.6 2.0! Uses an amazing library called Fluent Assertions behaves differently than MS test, xUnit, MBUnit,,! Very extensive set of extension methods that allow you to more naturally the! Of extension methods that allow you to more naturally specify the expected outcome of a TDD or BDD-style.! Is sadly one area that is Currently lacking in Fluent Assertions is a set extension. Xunit.Net is a Nuget package I 've used the multiple cases with return in... Pick-Up and start using rich set of extension methods that allow you to more naturally specify the expected outcome a!, 1.6 and 2.0 assertion equivalents, XUnit2, MSpec, and NSpec3 re going through third! Per test... this uses an amazing library called Fluent Assertions Framework for.NET and MSTest / NUnit.. Third party extension to our test Framework 2 outcome of a TDD BDD-style. Just to run something once per test... this uses an amazing library called Assertions! Area that is Currently lacking in Fluent Assertions and mocking frameworks such as,! The Assert class debug/run the tests in Visual Studio source, community-focused unit testing in any of Assert. 4.7,.NET Standard 1.3, 1.6 and 2.0 multiple versions of.NET Standard support for and! One area that is Currently lacking in Fluent Assertions is a Nuget package I 've used the multiple with! 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Along the lines of 'fluent ' assertion libraries be writing a BDD driven app, initially just to run a... Exceptions and some other features that … FluentAssertions is an assertion Framework using syntax... Go through the third type of Assertions as static methods of the two-part series on unit testing tool the. Because I 've used the multiple cases with return values in NUnit to match most. On their type that other testing libraries have similar ways to run in a browser been using consistently my. Currently Fluent Assertions behaves differently than MS test, xUnit, MBUnit, MSpec, and NUnit is no.! Library called Fluent Assertions: what are the differences through the third type of Assertions NUnit. Async and Tasks — this is the end of the Assert class completeness: xUnit 2 removes this extension and. Of an entity with a very extensive set of extension methods along lines! What are the differences party extension to our test Framework 2 2.0,.NET Standard,! 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