Initial commit.

PerfectNumbers.Core.Tests/PrimesGeneratorTests.cs

@@ -0,0 +1,25 @@
+using FluentAssertions;
+using Xunit;
+
+namespace PerfectNumbers.Core.Tests;
+
+public class PrimesGeneratorTests
+{
+    [Fact]
+    [Trait("Category", "Fast")]
+    public void Small_primes_and_squares_match()
+    {
+        var primes = PrimesGenerator.SmallPrimes;
+        var squares = PrimesGenerator.SmallPrimesPow2;
+
+        primes[..5].Should().Equal(new ulong[] { 2UL, 3UL, 5UL, 7UL, 11UL });
+
+        squares[..5].Should().Equal(new ulong[] { 4UL, 9UL, 25UL, 49UL, 121UL });
+
+        for (int i = 0; i < 5; i++)
+        {
+            squares[i].Should().Be(primes[i] * primes[i]);
+        }
+    }
+}
+