Initial commit.

PerfectNumbers.Core.Tests/PowerCacheTests.cs

@@ -0,0 +1,27 @@
+using System.Numerics;
+using FluentAssertions;
+using PeterO.Numbers;
+using Xunit;
+
+namespace PerfectNumbers.Core.Tests;
+
+public class PowerCacheTests
+{
+    [Fact]
+    [Trait("Category", "Fast")]
+    public void Get_returns_big_integer_power()
+    {
+        PowerCache.Get(2UL, 5).Should().Be(new BigInteger(32));
+        PowerCache.Get(2UL, 10).Should().Be(new BigInteger(1024));
+    }
+
+    [Fact]
+    [Trait("Category", "Fast")]
+    public void Get_returns_einteger_power()
+    {
+        EInteger baseVal = EInteger.FromInt32(3);
+        PowerCache.Get(baseVal, 4).Should().Be(EInteger.FromInt32(81));
+        PowerCache.Get(baseVal, 2).Should().Be(EInteger.FromInt32(9));
+    }
+}
+