Day 19 (#19)

Can't be bothered to get it faster

Co-authored-by: Smaug123 <patrick+github@patrickstevens.co.uk>
Reviewed-on: #19

AdventOfCode2023.FSharp/Test/TestList.fs

@@ -0,0 +1,20 @@
+namespace Test
+
+open NUnit.Framework
+open FsUnitTyped
+open FsCheck
+open AdventOfCode2023
+
+[<TestFixture>]
+module TestList =
+
+    [<Test>]
+    let ``n-tuples have the right length`` () =
+        let property (n : int) (xs : char list) =
+            let n = min (abs n) 6
+            let xs = xs |> List.take (min 10 xs.Length)
+            let tuples = List.nTuples n xs
+            tuples |> List.forall (fun i -> i.Length = n)
+
+        property 1 [ 'v' ] |> shouldEqual true
+        Check.QuickThrowOnFailure property