initial commit

puzzle/nqueens.tests/NBoardTests.cs

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+using NUnit.Framework;
+
+namespace nqueens.tests
+{
+	[TestFixture]
+	public class NBoardTests
+	{
+		[Test]
+		public void GetConflicts_SameRow()
+		{
+			var nBoard = new NBoard(new [] {0,0,0,0});
+			Assert.That(nBoard.GetConflictCount(0), Is.EqualTo(3));
+			Assert.That(nBoard.GetConflictCount(3), Is.EqualTo(3));
+		}
+
+		[Test]
+		public void GetConflicts_SameRow_AfterUpdates()
+		{
+			var nBoard = new NBoard(new [] {0,0,0,0});
+			nBoard.UpdateRow(0,2);
+			Assert.That(nBoard.GetConflictCount(1), Is.EqualTo(2));
+			nBoard.UpdateRow(2,1);
+			Assert.That(nBoard.GetConflictCount(0), Is.EqualTo(0));
+			nBoard.UpdateRow(0,0);
+			nBoard.UpdateRow(1,1);
+			nBoard.UpdateRow(2,2);
+			nBoard.UpdateRow(3,3);
+			Assert.That(nBoard.GetConflictCount(0), Is.EqualTo(3));
+			Assert.That(nBoard.GetConflictCount(1), Is.EqualTo(3));
+			Assert.That(nBoard.GetConflictCount(2), Is.EqualTo(3));
+			Assert.That(nBoard.GetConflictCount(3), Is.EqualTo(3));
+			nBoard.UpdateRow(3,2);
+			Assert.That(nBoard.GetConflictCount(0), Is.EqualTo(2));
+			Assert.That(nBoard.GetConflictCount(1), Is.EqualTo(2));
+			Assert.That(nBoard.GetConflictCount(2), Is.EqualTo(3));
+			Assert.That(nBoard.GetConflictCount(3), Is.EqualTo(1));
+		}
+
+		[Test]
+		public void GetConflicts_OneNonConflictRow()
+		{
+			var nBoard = new NBoard(new [] {2,0,0,0});
+			Assert.That(nBoard.GetConflictCount(1), Is.EqualTo(2));
+		}
+
+		[Test]
+		public void GetConflicts_NoConflicts()
+		{
+			var nBoard = new NBoard(new [] {2,0,1,0});
+			Assert.That(nBoard.GetConflictCount(0), Is.EqualTo(0));
+		}
+
+		[Test]
+		public void GetConflicts_AllDiagonalConflict()
+		{
+			var nBoard = new NBoard(new [] {0,1,2,3});
+			Assert.That(nBoard.GetConflictCount(2), Is.EqualTo(3));
+		}
+
+		[Test]
+		public void GetConflicts_AllOppositeDiagonalConflict()
+		{
+			var nBoard = new NBoard(new [] {3,2,1,0});
+			Assert.That(nBoard.GetConflictCount(3), Is.EqualTo(3));
+		}
+
+		[Test]
+		public void GetConflicts_TwoOppositeDiagonalConflict()
+		{
+			var nBoard = new NBoard(new [] {0,1,2,2});
+			Assert.That(nBoard.GetConflictCount(0), Is.EqualTo(2));
+		}
+	}
+}