Question

Here is a working trivial test:

module Tests

open NUnit.Framework
open FsUnit

[<TestFixture>] 
type simple ()=
   [<Test>] member test.
    ``tautology`` ()=
           true |> should be True

My project doesn’t use any of F#’s OOP features yet – can I write tests without objects, or is that just how NUnit works?

Answer 1

FsUnit/NUnit also supports let-bounds. Here is an example from FsUnit’s official announcement:

module Test.``equalWithin assertions``

open NUnit.Framework
open FsUnit

[<Test>]
let ``should equal within tolerance when less than``() =
    10.09 |> should (equalWithin 0.1) 10.11

[<Test>]
let ``should not equal within tolerance``() =
    10.1 |> should not ((equalWithin 0.001) 10.11)

Another example of using static functions could be found in FsUnit’s github page.