fsunit assembly is not signed with a strong name

In using fsunit from a strongly-named assembly I get the folllowing error

1) Test Error : TryFsunit.lib1.hello System.IO.FileLoadException : Could not load file or assembly 'FsUnit.NUnit, Version=1.3.1.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. A strongly-named assembly is required. (Exception from HR ESULT: 0x80131044) at TryFsunit.lib1.hello()

Nunit works fine. It’s just FSunit that isn’t signed. There are many ways to sign an assembly in the FSUnit build process – see msdn article

To reproduce

1. create a small library project. See (1)
2. add fsunit from nuget to the project
3. add any test
4. sign that library with a strong name. (There are many ways to do that. I used the <OtherFlags>--keyfile:SomeSignature.snk</OtherFlags> method in the .fsproj). See (2)
5. build with msbuild
6. run from command line “nunit-console.exe”
7. you will see the above error “Could not load file or assembly ‘FsUnit.NUnit’…A strongly-named assembly is required.”

(1) Sample library1.fs fragment

let add a b = a + b
// this fails at test runtime
[<Test>] 
let hello2() = add 2 3 |> should equal 5
// This works, which means: nunit is strong signed. But fsunit is not. 
[<Test>] 
let hello() =
    let n = add 2 3
    Assert.That(n,Is.EqualTo(5))

(2) Sample .fsproj file fragment with <OtherFlags>

<PropertyGroup>
    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
    <OutputType>Library</OutputType>
  ....
  <OtherFlags>--keyfile:SignKeyLifeQuest.snk</OtherFlags>
</PropertyGroup>

[sergey-tihon]

As workaround you can include FsUnit.fs or FsUnitTyped.fs file to your test project and do not reference FsUnit package.

• http://fsprojects.github.io/FsUnit/Paket.html
• http://fsprojects.github.io/FsUnit/FsUnitTyped.html#What-is-FsUnitTyped

[jwittner]

In order to expose internal types for testing to assemblies via the InternalsVisibleTo attribute from a signed assembly, those assemblies must also be signed. Right now I can’t do that =(.