Add QualityMeasure test.

src/Triangle.Tests/Tools/InterpolationTest.cs

@@ -12,7 +12,6 @@ namespace TriangleNet.Tests.Tools
         [Test, DefaultFloatingPointTolerance(1e-8)]
         public void TestInterpolatePoint()
         {
-
             var vertices = new List<Vertex>()
             {
                 new Vertex(0.0, 0.0) { ID = 0 },

src/Triangle.Tests/Tools/QualityMeasureTest.cs

@@ -0,0 +1,36 @@
+using NUnit.Framework;
+using System;
+using System.Collections.Generic;
+using TriangleNet.Geometry;
+using TriangleNet.Meshing.Algorithm;
+using TriangleNet.Tools;
+
+namespace TriangleNet.Tests.Tools
+{
+    public class QualityMeasureTest
+    {
+        [Test]
+        public void TestEquilateralTriangles()
+        {
+            double sqrt3 = Math.Sqrt(3);
+
+            var vertices = new List<Vertex>()
+            {
+                new Vertex(0.0, 0.0) { ID = 0 },
+                new Vertex(1.0, sqrt3) { ID = 1 },
+                new Vertex(2.0, 0.0) { ID = 2 },
+                new Vertex(3.0, sqrt3) { ID = 3 }
+            };
+
+            var mesh = new Dwyer().Triangulate(vertices, new Configuration());
+
+            var quality = new QualityMeasure(mesh);
+
+            Assert.AreEqual(quality.AreaMinimum, quality.AreaMaximum);
+            Assert.AreEqual(1.0, quality.AlphaMinimum);
+            Assert.AreEqual(1.0, quality.AlphaMaximum);
+            Assert.AreEqual(1.0, quality.Q_Minimum);
+            Assert.AreEqual(1.0, quality.Q_Maximum);
+        }
+    }
+}