FsCheck 2.0.0-alpha

This is a prerelease version of FsCheck.

There is a newer version of this package available.
See the version list below for details.

dotnet add package FsCheck --version 2.0.0-alpha

NuGet\Install-Package FsCheck -Version 2.0.0-alpha

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="FsCheck" Version="2.0.0-alpha" />

For projects that support PackageReference, copy this XML node into the project file to reference the package.

<PackageVersion Include="FsCheck" Version="2.0.0-alpha" />
                    

                            Directory.Packages.props

<PackageReference Include="FsCheck" />
                    

                            Project file

For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package.

paket add FsCheck --version 2.0.0-alpha

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

#r "nuget: FsCheck, 2.0.0-alpha"

#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.

#addin nuget:?package=FsCheck&version=2.0.0-alpha&prerelease
                    

                            Install FsCheck as a Cake Addin

#tool nuget:?package=FsCheck&version=2.0.0-alpha&prerelease
                    

                            Install FsCheck as a Cake Tool

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

FsCheck is a tool for testing .NET programs automatically. The programmer provides a specification of the program, in the form of properties which functions, methods or objects should satisfy, and FsCheck then tests that the properties hold in a large number of randomly generated cases. While writing the properties, you are actually writing a testable specification of your program. Specifications are expressed in F#, C# or VB, using combinators defined in the FsCheck library. FsCheck provides combinators to define properties, observe the distribution of test data, and define test data generators. When a property fails, FsCheck automatically displays a minimal counter example.

Product	Compatible and additional computed target framework versions.
.NET Framework	net45 is compatible. net451 was computed. net452 was computed. net46 was computed. net461 was computed. net462 was computed. net463 was computed. net47 was computed. net471 was computed. net472 was computed. net48 was computed. net481 was computed.

Compatible target framework(s)

Included target framework(s) (in package)

Learn more about Target Frameworks and .NET Standard.

- FSharp.Core (>= 3.1.2.1)

NuGet packages (25)

Showing the top 5 NuGet packages that depend on FsCheck:

Package	Downloads
FsCheck.Xunit FsCheck.Xunit integrates FsCheck with xUnit.NET by adding a PropertyAttribute that runs FsCheck tests, similar to xUnit.NET's FactAttribute. All the options normally available in vanilla FsCheck via configuration can be controlled via the PropertyAttribute.	4.6M
FsCheck.NUnit FsCheck.NUnit integrates FsCheck with NUnit by adding a PropertyAttribute that runs FsCheck tests, similar to NUnit TestAttribute. All the options normally available in vanilla FsCheck via configuration can be controlled via the PropertyAttribute.	1.4M
Expecto.FsCheck Property testing for Expecto, powered by FsCheck	749.1K
AutoFixture.Idioms.FsCheck Ubiquitous use of AutoFixture for unit testing has given rise to a number of idiomatic unit tests - unit tests that tend to follow common templates. The AutoFixture Idioms.FsCheck library encapsulates these idioms into reusable classes and methods.	268.8K
MBrace.Tests A collection of abstract NUnit-based test suites for evaluating MBrace runtime implementations.	104.9K

GitHub repositories (18)

Showing the top 5 popular GitHub repositories that depend on FsCheck:

Repository	Stars
dotnet/runtime .NET is a cross-platform runtime for cloud, mobile, desktop, and IoT apps.	16.1K
akkadotnet/akka.net Canonical actor model implementation for .NET with local + distributed actors in C# and F#.	4.8K
commandlineparser/commandline The best C# command line parser that brings standardized *nix getopt style, for .NET. Includes F# support	4.7K
AutoFixture/AutoFixture AutoFixture is an open source library for .NET designed to minimize the 'Arrange' phase of your unit tests in order to maximize maintainability. Its primary goal is to allow developers to focus on what is being tested rather than how to setup the test scenario, by making it easier to create object graphs containing test data.	3.4K
microsoft/onefuzz A self-hosted Fuzzing-As-A-Service platform	2.8K

Version	Downloads	Last updated
3.1.0	54,645	1/30/2025
3.0.1	11,314	1/22/2025
3.0.0	24,641	1/7/2025
3.0.0-rc3	139,227	3/3/2024
3.0.0-rc2	1,562	2/25/2024
3.0.0-rc1	57,237	7/23/2023
3.0.0-beta2	81,103	1/8/2022
3.0.0-beta1	12,915	9/5/2021
3.0.0-alpha5	48,097	12/28/2020
3.0.0-alpha4	362,402	10/6/2018
3.0.0-alpha3	114,694	12/30/2017
3.0.0-alpha2	8,932	10/19/2017
3.0.0-alpha1	4,881	9/26/2017
2.16.6	1,183,500	7/1/2023
2.16.5	1,016,534	6/1/2022
2.16.4	641,078	1/8/2022
2.16.3	308,421	9/4/2021
2.16.2	8,995	8/30/2021
2.16.0	60,209	8/13/2021
2.15.3	271,237	5/8/2021
2.15.2	101,528	4/15/2021
2.15.1	147,231	2/27/2021
2.15.0	29,931	2/23/2021
2.14.6	56,367	2/21/2021
2.14.5	5,274	2/18/2021
2.14.4	35,308	1/31/2021
2.14.3	595,375	6/9/2020
2.14.2	186,055	3/11/2020
2.14.0	941,984	4/17/2019
2.13.0	325,230	11/11/2018
2.12.1	33,843	10/18/2018
2.12.0	12,409	10/6/2018
2.11.0	418,790	6/15/2018
2.10.10	72,722	5/15/2018
2.10.9	571,119	4/10/2018
2.10.8	81,213	3/3/2018
2.10.7	23,321	1/29/2018
2.10.6	27,910	12/30/2017
2.10.5	18,763	12/28/2017
2.10.4	94,808	11/8/2017
2.10.3	13,270	9/26/2017
2.10.2	12,577	9/25/2017
2.10.1	4,689	9/23/2017
2.10.0	17,297	9/7/2017
2.9.2	11,805	8/28/2017
2.9.1	4,272	8/27/2017
2.9.0	215,197	5/18/2017
2.9.0-rc3	6,461	5/7/2017
2.9.0-rc2	2,472	5/6/2017
2.9.0-rc1	2,464	5/6/2017
2.8.2	11,545	5/6/2017
2.8.1	4,297	5/1/2017
2.8.0	21,730	3/15/2017
2.7.2	11,834	3/5/2017
2.7.1	18,265	2/13/2017
2.7.0	14,066	1/15/2017
2.6.3	8,214	1/13/2017
2.6.2	105,647	10/7/2016
2.6.1	64,426	9/25/2016
2.6.0	43,427	8/3/2016
2.5.0	85,161	6/7/2016
2.4.0	18,615	4/20/2016
2.3.0	6,548	4/11/2016
2.2.5	7,009	3/28/2016
2.2.4	27,582	12/17/2015
2.2.3	6,593	11/26/2015
2.2.2	6,874	11/14/2015
2.2.1	5,171	11/5/2015
2.2.0	20,994	11/1/2015
2.1.0	13,031	9/30/2015
2.0.7	15,831	8/20/2015
2.0.6	5,605	8/14/2015
2.0.5	22,042	7/31/2015
2.0.4	10,349	7/20/2015
2.0.3	31,732	7/10/2015
2.0.2	3,976	7/7/2015
2.0.1	26,590	5/23/2015
2.0.1-rc1	2,456	5/23/2015
2.0.0-alpha	2,794	4/27/2015
1.0.4	23,820	12/9/2014
1.0.3	5,909	11/18/2014
1.0.2	4,824	10/27/2014
1.0.1	5,327	10/18/2014
1.0.0	12,635	8/3/2014
0.9.4	52,220	5/24/2014
0.9.3	3,522	5/9/2014
0.9.2	74,528	11/7/2013
0.9.1	6,199	7/2/2013
0.9.0.1	3,401	6/21/2013
0.9.0	3,531	6/18/2013
0.8.3	4,824	8/26/2012
0.8.2	3,565	7/4/2012
0.8.1	3,932	6/25/2012
0.7.1	8,013	5/29/2011

Rename FsCheckTestCaseBuider to Builder. (potentially breaking change)
Add RequireQualifiedAccess to TestResult and Outcome. (breaking change for IRunner implementations and test framework integrations)
Remove Fluent API and SpecBuilder in favor of overloads in Prop and extension methods on Property (breaking change)
Add extension methods to allow working with Arbitrary from C#/VB.
Rename Any to Gen. Rename pretty much all methods on Any to match the existing methods they wrap on Gen module. (breaking change)
Add missing Gen and Arbitrary extension methods and C#/VB wrappers.
Make Property a real type instead of a type alias.
Add discard (by Mauricio Scheffer)
Various improvements and changes to Command interface for easier consumption, also from C#/VB (breaking change)
Add explicit dependency on FSharp.Core Nuget package to hopefully reduce version confusion and make things easier for C#/VB users.