Files
WoofWare.NUnitTestRunner/Consumer/TestParallelIndividualTest.fs
2024-10-29 17:17:39 +00:00

60 lines
1.8 KiB
Forth

namespace Consumer
open System
open System.Collections.Concurrent
open System.Threading
open NUnit.Framework
open FsUnitTyped
// These tests are flaky if the bug https://github.com/Smaug123/unofficial-nunit-runner/issues/168 is unfixed.
[<TestFixture>]
module TestParallelIndividualTest =
type private Transitions =
| Started of int
| LockAcquired of int
| Exited of int
let locker = obj ()
let private sequence = ConcurrentQueue<Transitions> ()
[<Test>]
[<Parallelizable(ParallelScope.None)>]
let ``does not run in parallel`` () =
sequence.Enqueue (Transitions.Started 0)
let entered = Monitor.TryEnter (locker, TimeSpan.Zero)
if entered then
sequence.Enqueue (Transitions.LockAcquired 0)
Monitor.Exit locker
sequence.Enqueue (Transitions.Exited 0)
else
sequence.Enqueue (Transitions.Exited 0)
failwith "failed to acquire the lock"
[<Test>]
let ``unrestricted parallelism`` () =
sequence.Enqueue (Transitions.Started 1)
let entered = Monitor.TryEnter (locker, TimeSpan.Zero)
if entered then
sequence.Enqueue (Transitions.LockAcquired 1)
Monitor.Exit locker
sequence.Enqueue (Transitions.Exited 1)
else
sequence.Enqueue (Transitions.Exited 1)
failwith "failed to acquire the lock"
[<OneTimeTearDown>]
let ``It worked`` () =
let sequence = sequence |> Seq.toList
let allowed n =
[ Transitions.Started n ; Transitions.LockAcquired n ; Transitions.Exited n ]
if sequence <> allowed 0 @ allowed 1 && sequence <> allowed 1 @ allowed 0 then
let s = sequence |> Seq.map string<Transitions> |> String.concat "\n"
failwith $"Unexpected sequence!\n%s{s}"
()