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Getting "option" error with xUnit2 target in FAKE build file

When I add the xUnit2 example to the FAKE build file, I get this error:

error FS0001: This expression is expected to be of type string but here is type string

Target example from FAKE xunit2 documentation

Target "Test" (fun _ ->
    !! (testDir @@ "xUnit.Test.*.dll")
      |> xUnit2 (fun p -> {p with HtmlOutputPath = (testDir @@ "xunit.html")})
)

Visual Studio highlights a section of (testDir @@ "xunit.html")

code.

I understand that it expects two parameters, but I don't know enough F # yet to figure out how to fix the problem:

Before enabling the xUnit target, my FAKE build was working fine. I added open Fake.Testing.XUnit2

to the assembly file and I am not getting the error with the xUnit2 link.

Any help would be appreciated.

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1 answer


So the error is that the type HtmlOutputPath

is

HtmlOutputPath : string option

In Fake I believe it @@

does Path.Combine

, so testDir @@ "xunit.html

must have a string like.



To match types you can use

HtmlOutputPath = Some(testDir @@ "xunit.html")

This suggests that the FAKE documentation is incorrect.

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