refactoring test classes.

IntegrationTests/Infrastructure/GlobalVariables.cs

@@ -0,0 +1,15 @@
+using System;
+
+namespace IntegrationTests.Infrastructure
+{
+    /// <summary>
+    /// A class holding global variables.
+    /// </summary>
+    public static class GlobalVariables
+    {
+        /// <summary>
+        /// A random number generator.
+        /// </summary>
+        public static Random Random = new Random();
+    }
+}