Fixed lazychaser#65

Author: lazychaser

src/QueryBuilder.php

@@ -450,7 +450,7 @@ public function moveNode($key, $position)
     {
         list($lft, $rgt) = $this->model->newServiceQuery()->getPlainNodeData($key, true);
 
-        if ($lft < $position && $position < $rgt)
+        if ($lft < $position && $position <= $rgt)
         {
             throw new LogicException('Cannot move node into itself.');
         }

tests/NodeTest.php

@@ -211,14 +211,34 @@ public function testCategoryMovesUp()
     /**
      * @expectedException Exception
      */
-    public function testFailsToInsertIntoItself()
+    public function testFailsToInsertIntoChild()
     {
         $node = $this->findCategory('notebooks');
         $target = $node->children()->first();
 
         $node->afterNode($target)->save();
     }
 
+    /**
+     * @expectedException Exception
+     */
+    public function testFailsToAppendIntoItself()
+    {
+        $node = $this->findCategory('notebooks');
+
+        $node->appendTo($node)->save();
+    }
+
+    /**
+     * @expectedException Exception
+     */
+    public function testFailsToPrependIntoItself()
+    {
+        $node = $this->findCategory('notebooks');
+
+        $node->prependTo($node)->save();
+    }
+
     public function testWithoutRootWorks()
     {
         $result = Category::withoutRoot()->pluck('name');