Conjecture.FSharp.Expecto 0.27.1

.NET 10.0 This package targets .NET 10.0. The package is compatible with this framework or higher.
There is a newer version of this package available.
See the version list below for details. 
dotnet add package Conjecture.FSharp.Expecto --version 0.27.1
                    


                    

                
NuGet\Install-Package Conjecture.FSharp.Expecto -Version 0.27.1
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="Conjecture.FSharp.Expecto" Version="0.27.1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="Conjecture.FSharp.Expecto" Version="0.27.1" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="Conjecture.FSharp.Expecto" />
                    


                            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 Conjecture.FSharp.Expecto --version 0.27.1
                    


                    

                
#r "nuget: Conjecture.FSharp.Expecto, 0.27.1"
#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. 
#:package Conjecture.FSharp.Expecto@0.27.1
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=Conjecture.FSharp.Expecto&version=0.27.1
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=Conjecture.FSharp.Expecto&version=0.27.1
                    


                            Install as a Cake Tool

Conjecture.FSharp.Expecto

Expecto integration for Conjecture.FSharp. Adds a property test builder that derives a generator via Gen.auto<'a> () and runs the assertion under Conjecture's shrinking engine.

Install

dotnet add package Conjecture.Core
dotnet add package Conjecture.FSharp
dotnet add package Conjecture.FSharp.Expecto

Usage

open Expecto
open Conjecture.FSharp.Expecto

let tests =
    testList "list invariants" [
        property "reversal is involutive" (fun (xs: int list) ->
            List.rev (List.rev xs) = xs)

        property "concat preserves length" (fun (a: int list, b: int list) ->
            List.length (a @ b) = List.length a + List.length b)
    ]

[<EntryPoint>]
let main argv =
    runTestsWithCLIArgs [] argv tests

The property function accepts any 'a -> bool (false → failure) or 'a -> unit (exception → failure). The argument type drives Gen.auto<'a> (), so any record / DU built from primitives, options, results, lists, sets, sequences, and tuples is covered out of the box.

API

Function Returns Notes
property name (test : 'a -> bool) Test Reflection-derived Gen<'a>; false ⇒ failure.
property name (test : 'a -> unit) Test Same generator; any exception ⇒ failure.
Product Compatible and additional computed target framework versions.
.NET net10.0 is compatible.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows 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
0.29.0 116 5/9/2026
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0.27.1 122 4/28/2026
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0.24.0 106 4/26/2026
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