Fixed lasttrial access, wrote tests to catch these errors

Author: jackbrookes

Assets/UXF/Scripts/Session.cs

@@ -158,7 +158,7 @@ public class Session : MonoBehaviour
         public Trial PrevTrial { get { return GetPrevTrial(); } }
 
         /// <summary>
-        /// Get the last trial in the last block of the session.
+        /// Get the first trial in the first block of the session.
         /// </summary>
         public Trial FirstTrial { get { return GetFirstTrial(); } }
 
@@ -648,7 +648,7 @@ Trial GetLastTrial()
             Block lastBlock;
             try
             {
-                lastBlock = blocks[0];
+                lastBlock = blocks[blocks.Count - 1];
             }
             catch (ArgumentOutOfRangeException)
             {

Assets/UXF/Scripts/Tests/Editor/TestSessionBuilding.cs

@@ -133,7 +133,7 @@ public void SwapTrials()
 		[Test]
 		public void InvalidTrialAccess()
 		{
-			Block block = session.CreateBlock();
+			session.CreateBlock();
 
 			Assert.Throws<NoSuchTrialException>(
 				delegate { Trial t = session.FirstTrial; }
@@ -158,6 +158,19 @@ public void InvalidBlockAccess()
 				delegate { Trial t = session.LastTrial; }
 			);
 		}
+
+		[Test]
+		public void FirstLast()
+		{
+			Block block1 = session.CreateBlock(10);
+			Block block2 = session.CreateBlock(10);
+
+			Assert.AreEqual(block1.trials[0], session.FirstTrial);
+			Assert.AreEqual(block2.trials[9], session.LastTrial);
+
+			// reset blocks
+            session.blocks = new List<Block>();
+		}
 
 	}