Initial commit.

PerfectNumbers.Core.Tests/MersenneDivisorCyclesTests.cs

@@ -0,0 +1,25 @@
+using FluentAssertions;
+using Xunit;
+
+namespace PerfectNumbers.Core.Tests;
+
+public class MersenneDivisorCyclesTests
+{
+    public static IEnumerable<object[]> Divisors() =>
+        new[]
+        {
+            new object[] {3UL, 2UL},
+            new object[] {7UL, 3UL},
+            new object[] {11UL, 10UL},
+        };
+
+    [Theory]
+    [Trait("Category", "Fast")]
+    [MemberData(nameof(Divisors))]
+    public void CalculateCycleLength_returns_expected_value(ulong divisor, ulong expected)
+    {
+        MersenneDivisorCycles.CalculateCycleLength(divisor).Should().Be(expected);
+        MersenneDivisorCycles.CalculateCycleLengthGpu(divisor).Should().Be(expected);
+    }
+}
+