i20 add wiki test

Author: matiii

src/Dijkstra.NET.Tests/PageRank/PageRankExtensionsTests.cs

@@ -30,5 +30,31 @@ public void CalculatePageRank_Should_Calculate_Correct_PageRank()
 
             Assert.True(Math.Abs(result[c] - 0.35625) < 0.0001);
         }
+        
+        [Fact]
+        public void CalculatePageRank_Should_Calculate_Correct_PageRank_Wiki()
+        {
+            var g = new Graph<string, byte>();
+
+            uint a = g.AddNode("A");
+            uint b = g.AddNode("B");
+            uint c = g.AddNode("C");
+            uint d = g.AddNode("D");
+
+            g.Connect(a, b, 0, 0);
+            g.Connect(a, d, 0, 0);
+            g.Connect(b, a, 0, 0);
+            g.Connect(c, b, 0, 0);
+            g.Connect(c, a, 0, 0);
+            g.Connect(d, c, 0, 0);
+
+
+            var result = g.CalculatePageRank();
+            
+            Assert.True(Math.Abs(result[a] - 0.35) < 0.01);
+            Assert.True(Math.Abs(result[b] - 0.29) < 0.01);
+            Assert.True(Math.Abs(result[c] - 0.15) < 0.01);
+            Assert.True(Math.Abs(result[d] - 0.18) < 0.01);
+        }
     }
 }