Demonstrate asserting a function returns Some using Unquote

gistfile1.fs

//here is the function we'd like to test
let testedFunc() = None:option<int>

//here is our Unquote assertion function (using xUnit.net, but can use any unit testing framework such as NUnit)
[<Fact>]
let ``tested func does not return None`` () =
    test <@ testedFunc() |> Option.isSome @>

//here is the output from the failing assertion 
(*
Test 'TestModule.tested func does not return None' failed: 

testedFunc() |> Option.isSome
None |> Option.isSome
false

	C:\TestModule.fs(964,0): at TestModule.tested func does not return None()
*)