FluentAssertions.LanguageExt 0.5.0

dotnet add package FluentAssertions.LanguageExt --version 0.5.0                
NuGet\Install-Package FluentAssertions.LanguageExt -Version 0.5.0                
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="FluentAssertions.LanguageExt" Version="0.5.0" />                
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add FluentAssertions.LanguageExt --version 0.5.0                
#r "nuget: FluentAssertions.LanguageExt, 0.5.0"                
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install FluentAssertions.LanguageExt as a Cake Addin
#addin nuget:?package=FluentAssertions.LanguageExt&version=0.5.0

// Install FluentAssertions.LanguageExt as a Cake Tool
#tool nuget:?package=FluentAssertions.LanguageExt&version=0.5.0                

FluentAssertions.LanguageExt

  • See LanguageExt C# Functional Programming Language Extensions for more information about functional-programming 'base class library'.
  • See FluentAssertions for more information about the extensive set of extension methods for unit tests.

Special thanks to @sparerd for the many new features.

Nuget

Install-Package FluentAssertions.LanguageExt

FluentAssertions.LanguageExt

Option, OptionAsync and OptionUnsafe

Methods
  • BeSome()
  • BeSome(expected)
  • BeSome(action)
  • BeNone()
Example Usage
using FluentAssertions;
using FluentAssertions.LanguageExt;

... 
var option = Prelude.Some(123);
var optionnone = Option<int>.None;

option.Should().BeSome();
option.Should().BeSome(8);
option.Should().BeSome(s => s.Should().Be(8));
option.Should().BeSome().Which.Should().Be(8);

optionnone.Should().BeNone();

Either, EitherAsync and EitherUnsafe

Methods
  • Be(expected)
  • BeLeft()
  • BeLeft(action)
  • BeRight()
  • BeRight(action)
  • BeBottom()
Example Usage
using FluentAssertions;
using FluentAssertions.LanguageExt;

... 
Either<int, string> left = Prelude.Left(8);
Either<int, string> right = Prelude.Right("a");

left.Should().BeLeft();
left.Should().BeLeft(l => l.Should().Be(8));
left.Should().BeLeft().Which.Should().Be(8);
left.Should().Be(8);

right.Should().BeRight();
right.Should().BeRight(r => r.Should().Be("a"));
right.Should().BeRight().Which.Should().Be("a");
right.Should().Be("a");

Validation

Breaking Change for 0.3.1

There's a breaking change when using BeFail() with the .Which extension.

When using the BeFail() assertion on a Validation<TFail, TSucc>, the .Which extension returns only a single failure instance even though the Validation type has a Seq<TFail>. This prevents proper assertions on the failures returned from a Validation using the .Which extension.

This has now been fixed.

The return signature for BeFail() has changed from AndWhichConstraint<LanguageExtValidationAssertions<TFail, TSuccess>, TFail> to AndWhichConstraint<LanguageExtValidationAssertions<TFail, TSuccess>, Seq<TFail>>

Methods
  • BeFail()
  • BeSuccess()
  • BeSuccess(action)
  • Be(expected)

Try and TryAsync

Methods
  • BeFail()
  • BeSuccess()

TryOption and TryAsyncOption

Methods
  • BeFail()
  • BeSome()
  • BeSome(action)
  • BeNone()
  • BeNoneOrFail()
  • Be(expected)

Fin

Methods
  • BeSuccess()
  • BeSuccess(action)
  • BeFail()
  • BeBottom()
  • Be(expected)
Example Usage
using FluentAssertions;
using FluentAssertions.LanguageExt;

... 
Fin<int> successFin = Prelude.FinSucc(8);
Fin<int> failedFin = Prelude.FinFail<int>("Error message");

successFin.Should().BeSuccess();
successFin.Should().BeSuccess(v => v.Should().Be(8));
successFin.Should().BeSuccess().Which.Should().Be(8);
successFin.Should().Be(8);

failedFin.Should().BeFail();
failedFin.Should().BeFail().Which.Message.Should().Be("Error message");
Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 is compatible.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 was computed. 
.NET Framework net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
0.5.0 17,120 11/5/2023
0.4.0 30,667 10/3/2022
0.3.1 441 9/22/2022
0.3.0 430 8/28/2022
0.2.1 1,702 4/10/2022
0.2.0 554 11/30/2021
0.1.0 330 11/29/2021

Added support for asserting on Fin<T> monad.