Parent tasks with no children now return disabled

Author: ashblue

Assets/FluidBehaviorTree/Editor/Testing/ParentTasks/TaskParentTest.cs

@@ -25,6 +25,28 @@ protected override TaskStatus OnUpdate () {
             }
         }
 
+        public class EnabledProperty : TaskParentTest {
+            [Test]
+            public void Returns_disabled_if_no_children () {
+                Assert.IsFalse(taskParent.Enabled);
+            }
+            
+            [Test]
+            public void Returns_enabled_if_child () {
+                taskParent.AddChild(A.TaskStub().Build());
+                
+                Assert.IsTrue(taskParent.Enabled);
+            }
+            
+            [Test]
+            public void Returns_disabled_if_child_and_set_to_disabled () {
+                taskParent.AddChild(A.TaskStub().Build());
+                taskParent.Enabled = false;
+                
+                Assert.IsFalse(taskParent.Enabled);
+            }
+        }
+
         public class ResetMethod : TaskParentTest {
             [Test]
             public void Runs_reset_on_the_child_task () {

Assets/FluidBehaviorTree/Editor/Testing/ParentTasks/TaskSequenceTest.cs

@@ -390,12 +390,12 @@ public void Triggers_lower_priority_when_valid () {
 
                     var sequenceSub = new Sequence();
                     sequenceSub.AbortType = AbortType.LowerPriority;
-                    sequence.AddChild(sequenceSub);
 
                     var condition = A.TaskStub()
                         .WithAbortConditionSelf(true)
                         .Build();
                     sequenceSub.AddChild(condition);
+                    sequence.AddChild(sequenceSub);
 
                     var action = A.TaskStub()
                         .WithUpdateStatus(TaskStatus.Continue)

Assets/FluidBehaviorTree/Scripts/TaskParents/Composites/Sequence.cs

@@ -1,5 +1,4 @@
-using System.Collections.Generic;
-using Adnc.FluidBT.Tasks;
+using Adnc.FluidBT.Tasks;
 
 namespace Adnc.FluidBT.TaskParents {
     public class Sequence : CompositeBase {

Assets/FluidBehaviorTree/Scripts/TaskParents/TaskParentBase.cs

@@ -3,9 +3,14 @@
 
 namespace Adnc.FluidBT.TaskParents {
     public abstract class TaskParentBase : ITaskParent {
+        private bool _enabled = true;
+        
         public AbortType AbortType { get; set; } = AbortType.None;
 
-        public bool Enabled { get; set; } = true;
+        public bool Enabled {
+            get { return children.Count != 0 && _enabled; }
+            set { _enabled = value; }
+        }
 
         public List<ITask> children { get; } = new List<ITask>();