dupdobnightly - NFluent 2.7.0-beta-0213

NFluent is an ergonomic check library which aims to fluent your .NET TDD experience (based on simple Check.That() check statements). NFluent aims your tests to be fluent to write (with an happy 'dot' auto completion experience), fluent to read (i.e. as close as possible to plain English expression), but also fluent to troubleshoot, in a less-error-prone way comparing to the classical .NET test frameworks. NFluent is directly, but also freely, inspired by the awesome Java FEST fluent check/reflection library (http://fest.easytesting.org/).

PM> Install-Package NFluent -Version 2.7.0-beta-0213 -Source https://www.myget.org/F/dupdobnightly/api/v3/index.json

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> nuget.exe install NFluent -Version 2.7.0-beta-0213 -Source https://www.myget.org/F/dupdobnightly/api/v3/index.json

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> dotnet add package NFluent --version 2.7.0-beta-0213 --source https://www.myget.org/F/dupdobnightly/api/v3/index.json

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<PackageReference Include="NFluent" Version="2.7.0-beta-0213" />
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source https://www.myget.org/F/dupdobnightly/api/v3/index.json

nuget NFluent  ~> 2.7.0-beta-0213
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> choco install NFluent --version 2.7.0-beta-0213 --source https://www.myget.org/F/dupdobnightly/api/v2

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Import-Module PowerShellGet
Register-PSRepository -Name "dupdobnightly" -SourceLocation "https://www.myget.org/F/dupdobnightly/api/v2"
Install-Module -Name "NFluent" -RequiredVersion "2.7.0-beta-0213" -Repository "dupdobnightly" -AllowPreRelease
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V 2.7.0

New checks

  • You can use IsCloseTo on DateTime and DateTimeOffset to check if a given date is close to a reference one.


  • Check.That(IEnumerable).IsEquivalent(...) now uses default logic for equality check.

  • Significantly improved error messages for enumeration and dictionary equality comparison.

  • Restore typed IsEqualTo check. It should ensure smoother experience with autocompletion logic. Non typed version

(using Object as a parameter) is still available.

  • You can use WhichMember to perform checks on any member of an exception.


  • the Not operator no longer erases the custom message set using WithCustomMessage

  • Check.That(IDictionary).IsEquivalent now fails as expected when the sut has entries that do not exist in the expected dictionary.

  • IsEquivalent now performs deep equivalence. For example, it supports Dictionaries of Dictionaries

  • Enum properties are properly considered when using Considering.

  • Enumeration of KeyValue pairs are no longer treated as dictionaries but as enumeration. This behavior was a hack

to support custom IDictionary<K,V> implementations. Detection logic has been improved so this is no longer necessary.

GitHub Issues

  • #306, #312, #313, #314, #315, #317

V 2.6.0

New feature

  • NFluent now supports assumption through Assuming entry point. For example you express it as :Assume.That(sut).IsEqualTo(expected); in a nutshell

you type Assuming instead of Check. All checks are available. Note that actual support depends on the underlying testing framework. As of now

it is supported for NUnit and MsTest

  • NFluent now supports DateTimeOffset type with the same gchecks than for DateTime. These checks fails

if the offsets are different. The IsSameUtcInstant cheks perform a comparison integrating the offset.

New checks

  • You can use WhoseSize() to check the size of an enumeration. It is used as an extension keyword, as in:



  • When using the Equals method, NFluent now uses expected.Equals(actual) instead of actual.Equals(expected).

This should have limited impact.

  • Actual and expected value naming has been redesigned to improve naming accuracy. Impact vary depending on checks and types.

  • Comparison of enumeration now provides details regarding the differences. You can control

how many differences are reported using the property ExtensionsCommonHelpers.CountOfLineOfDetails.

  • Cleaned up the reporting of array fields when using Considering. The superfluous dot (as in field.[index])

has been removed.

  • Improved implementation for Equals when using Considering. You should use IsEqualTo when checking for

  • equality, but we also provide an implementation of Equals as a failsafe.


  • Fix issue with IEnumerable

  • Several error messages have been improved due to fix on check helpers.

  • NotSupportedException when using ContainsExactly on strings.

  • Fix issue with single dimension arrays and field based checks where the LAST item of the array was not evaluated during the check (issue found thanks to mutation test)

  • Comparing Array with considering was no different than when using IsEqualTo. This has been fixed.

Therefore error messages are now in line with what was expected


Foreword: several breaking changes have been introduced that may trigger build error in your custom extensions if you have made any.

Methods and types have been renamed, so your code will have to refer the new names. IF YOU ENCOUNTER ISSUES AND NEED ASSISTANCE, please open an issue, we will assist you ASAP.

  • All lambda/code specific interfaces (ICodeCheck

  • ICheckLogic.DefineExpectedValues now expects an generic IEnumerable

  • you can use ICheckLogic.DefinePossibleTypes if you need to have a list of possible types for the sut (displayed in the error message)

  • improved naming: ICheckLogic.DefineExpectedValues has been renamed DefinePossibleValues

  • checks helper (ICheckLogic) now correctly reports the fundamental error instead of a detail error. In previous version, the error messages could focus on details, e.g. report the

exception's message when the issue is the exception's type.

  • add a flag (boolean) to BuildCheckLinkWhich method (allows to provide subitem check) that allows to speciyf sub item is available.

GitHub Issues

  • #225, #291, #292, #295, #296, #297, #299, #302
  • .NETFramework 2.0:
  • .NETFramework 3.0:
  • .NETFramework 3.5:
  • .NETFramework 4.0:
  • .NETFramework 4.5:
  • .NETStandard 1.3:
  • .NETStandard 2.0:





Project URL





tdd bdd test fluent check checks easy nunit xunit mbunit mstestsucks


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1 downloads for version 2.7.0-beta-0213
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Package history

Version Size Last updated Downloads Mirrored?
3.0.0-beta-0250 634.56 KB Fri, 04 Feb 2022 15:10:23 GMT 0
3.0.0-beta-0246 640.28 KB Wed, 13 Oct 2021 10:03:19 GMT 0
3.0.0-beta-0245 638.54 KB Mon, 11 Oct 2021 21:43:04 GMT 0
3.0.0-beta-0244 638.07 KB Mon, 11 Oct 2021 13:07:00 GMT 0
3.0.0-beta-0241 628.11 KB Tue, 22 Jun 2021 07:44:49 GMT 0
3.0.0-beta-0238 774.62 KB Tue, 16 Feb 2021 21:16:51 GMT 41
3.0.0-beta-0237 773.02 KB Sat, 13 Feb 2021 15:06:07 GMT 0
3.0.0-beta-0236 764.76 KB Sun, 24 Jan 2021 15:23:35 GMT 0
3.0.0-beta-0223 764.58 KB Wed, 16 Dec 2020 21:28:20 GMT 1
3.0.0-beta-0222 761.9 KB Thu, 22 Oct 2020 07:46:33 GMT 1
3.0.0-beta-0220 761.89 KB Wed, 14 Oct 2020 07:22:28 GMT 0
3.0.0-beta-0216 761.89 KB Tue, 13 Oct 2020 13:59:47 GMT 0
3.0.0-beta-0214 756.99 KB Thu, 23 Jul 2020 07:02:28 GMT 0
2.7.0-beta-0213 1.44 MB Wed, 29 Jan 2020 06:07:43 GMT 1
2.6.0-beta-0197 1.3 MB Fri, 03 May 2019 07:05:26 GMT 1
2.5.1-beta-0194 1.24 MB Fri, 22 Mar 2019 21:38:54 GMT 1
2.4.0-beta-0187 881.53 KB Thu, 06 Sep 2018 20:18:31 GMT 1
2.4.0-beta-0186 881.49 KB Thu, 06 Sep 2018 12:51:55 GMT 1
2.4.0-beta-0183 760.05 KB Thu, 19 Jul 2018 15:57:18 GMT 1
2.4.0-beta-0182 758.11 KB Wed, 18 Jul 2018 13:18:25 GMT 2