Added test for SkipGate and improved documentation.

Author: Whathecode

src/Whathecode.System/Algorithm/AbstractGate.cs

@@ -5,6 +5,9 @@
 	/// </summary>
 	public abstract class AbstractGate
 	{
+		/// <summary>
+		/// Automatically reset the gate after entering.
+		/// </summary>
 		protected bool AutoReset { get; private set; }
 
 

src/Whathecode.System/Algorithm/SkipGate.cs

@@ -9,6 +9,11 @@ public class SkipGate : AbstractGate
 		int _curCount;
 
 
+		/// <summary>
+		/// Create a new gate which skips a specified amount of entries before opening.
+		/// </summary>
+		/// <param name = "skipCount">The amount of times entry is denied before opening.</param>
+		/// <param name = "autoReset">Whether the gate is reset after entry is successful.</param>
 		public SkipGate( int skipCount, bool autoReset = false )
 			: base( autoReset )
 		{

test/Whathecode.System.Tests/Algorithm/SkipGateTest.cs

@@ -0,0 +1,39 @@
+using Whathecode.System.Algorithm;
+using Xunit;
+
+
+namespace Whathecode.Tests.System.Algorithm
+{
+    public class SkipGateTest
+    {
+		[Fact]
+		public void OpenOnThird()
+		{
+			SkipGate openOnThird = new SkipGate( 2 );
+			for ( int i = 1; i < 5; ++i )
+			{
+				if ( openOnThird.TryEnter() )
+				{
+					Assert.True( i >= 3 );
+				}
+			}
+		}
+
+		[Fact]
+		public void OpenEveryFive()
+		{
+			SkipGate openOnPluralFive = new SkipGate( 4, true );
+			int timesOpened = 0;
+			for ( int i = 1; i <= 20; ++i )
+			{
+				if ( openOnPluralFive.TryEnter() )
+				{
+					Assert.True( i % 5 == 0 );
+					++timesOpened;
+				}
+			}
+
+			Assert.Equal( 4, timesOpened );
+		}
+    }
+}