more unit tests need to remove triangle height width

Shapes/Triangle.cs

@@ -26,13 +26,13 @@ namespace Shapes
             Lines.Add(new Line(point2, point3));
             Lines.Add(new Line(point3, point1));
 
-            var centerOfLine3 = (point1 - point3) / 2 + point1;
+            var centerOfLine1 = (point1 - point2) / 2 + point1;
-            var centerTriangle = (point1 - centerOfLine3) / 2 + point1;
+            var centerTriangle = (point1 - centerOfLine1) / 2 + point1;
 
 
             CenterPoint = centerTriangle;
 
-            Height = new Line(point1, centerOfLine3).ComputeLength();
+            Height = new Line(point1, point3).ComputeLength();
             Width = new Line(point1, point2).ComputeLength();
         }
 
@@ -59,6 +59,9 @@ namespace Shapes
             var centerOfLine3 = (point1 - point3) / 2 + point1;
             var centerTriangle = (point1 - centerOfLine3) / 2 + point1;
             
+            Height = new Line(point1, point3).ComputeLength();
+            Width = new Line(point1, point2).ComputeLength();
+
             CenterPoint = centerTriangle;
         }
 

UnitTests/TriangleTests.cs

@@ -1,3 +1,5 @@
+using System;
+using System.Collections.Generic;
 using System.Drawing;
 using NUnit.Framework;
 using Shapes;
@@ -33,16 +35,21 @@ namespace Tests
             Assert.AreEqual(point3, triangle.Lines[1].Point2);
             Assert.AreEqual(point3, triangle.Lines[2].Point1);
             Assert.AreEqual(point1, triangle.Lines[2].Point2);
+            Assert.AreEqual(3, triangle.Height);
+            Assert.AreEqual(3, triangle.Width);
 
         }
+
         [Test]
         public void TriangleXY()
         {
             var point1x = 0;
-            var point2x = 3;
-            var point3x = 0;
             var point1y = 0;
+
+            var point2x = 3;
             var point2y = 0;
+
+            var point3x = 0;
             var point3y = 3;
 
             var triangle = new Triangle(point1x, point1y, point2x, point2y, point3x, point3y);
@@ -60,6 +67,8 @@ namespace Tests
             Assert.AreEqual(point3x, triangle.Lines[1].Point2.X);
             Assert.AreEqual(point3x, triangle.Lines[2].Point1.X);
             Assert.AreEqual(point1x, triangle.Lines[2].Point2.X);
+
+
             Assert.AreEqual(point1y, triangle.Points[0].Y);
             Assert.AreEqual(point2y, triangle.Points[1].Y);
             Assert.AreEqual(point3y, triangle.Points[2].Y);
@@ -69,6 +78,56 @@ namespace Tests
             Assert.AreEqual(point3y, triangle.Lines[1].Point2.Y);
             Assert.AreEqual(point3y, triangle.Lines[2].Point1.Y);
             Assert.AreEqual(point1y, triangle.Lines[2].Point2.Y);
+            Assert.AreEqual(3, triangle.Height);
+            Assert.AreEqual(3, triangle.Width);
+
+        }
+
+        [Test]
+        public void ComputeAreaTest()
+        {
+            var point1 = new Point(0, 0);
+            var point2 = new Point(3, 0);
+            var point3 = new Point(0, 3);
+            var area = 9 * .5;
+
+            var triangle = new Triangle(point1, point2, point3);
+
+            Assert.LessOrEqual(Math.Abs(triangle.ComputeArea() - area), 3.0E-15d);
+        }
+
+        [Test]
+        public void ScaleTest()
+        { 
+            List<Point> points = new List<Point>();
+
+            var triangle = new Triangle(
+                new Point(0, 0),
+                new Point(1, 0),
+                new Point(0, 1));
+                
+            points.Add(new Point(0, 0));
+            points.Add(new Point(1, 0));
+            points.Add(new Point(0, 1));
+            triangle.Scale(10);
+            for (int i = 0; i < triangle.Points.Count; i++)
+            {
+                points[i].X *= 10; 
+                points[i].Y *= 10;
+                Assert.AreEqual(points[i].X, triangle.Points[i].X);
+                Assert.AreEqual(points[i].Y, triangle.Points[i].Y);
+            }
+        }
+
+        [Test]
+        public void ComputeCenterTest()
+        {
+            var triangle = new Triangle(
+                new Point(0, 0),
+                new Point(1, 0),
+                new Point(0, 1));
+            Assert.AreEqual(.25, triangle.CenterPoint.X);
+            Assert.AreEqual(.5, triangle.CenterPoint.Y);
 
         }
     }