Added tests for optimization process

Ed25519 Tests/EdPointTests.cs

@@ -0,0 +1,39 @@
+using System;
+using System.Collections.Generic;
+using System.Numerics;
+using System.Text;
+using Ed25519;
+using NUnit.Framework;
+
+namespace Ed25519_Tests
+{
+    public sealed class EdPointTests
+    {
+        [Test]
+        public void TestScalMul01()
+        {
+            var point = new EdPoint
+            {
+                X = new BigInteger(1_000_000_000_000d),
+                Y = new BigInteger(1_024),
+            };
+
+            var scalar = new BigInteger(10_000);
+            var result = point.ScalarMul(scalar);
+
+            Assert.That(result.X, Is.EqualTo(BigInteger.Parse("21818314728053983532520901163316227408567979942776402561242051297393768362536")));
+            Assert.That(result.Y, Is.EqualTo(BigInteger.Parse("22622610217554165211892652042645278972766880794387244645923515142420844725944")));
+        }
+
+        [Test]
+        public void TestExpMod01()
+        {
+            var number = new BigInteger(10_000d);
+            var exponent = new BigInteger(10d);
+            var modulo = new BigInteger(105d);
+
+            var result = number.ExpMod(exponent, modulo);
+            Assert.That(result, Is.EqualTo(new BigInteger(25d)));
+        }
+    }
+}