FIXED integration test

ADDED $recursive and $isActive, flags to getChildren()

Author: Denis Ristic

app/code/Magento/Catalog/Model/Category.php

@@ -780,12 +780,14 @@ public function getAllChildren($asArray = false)
     /**
      * Retrieve children ids comma separated
      *
+     * @param boolean $recursive
+     * @param boolean $isActive
      * @param boolean $sortByPosition
      * @return string
      */
-    public function getChildren($sortByPosition = false)
+    public function getChildren($recursive = true, $isActive = true, $sortByPosition = false)
     {
-        return implode(',', $this->getResource()->getChildren($this, false, true, $sortByPosition));
+        return implode(',', $this->getResource()->getChildren($this, $recursive, $isActive, $sortByPosition));
     }
 
     /**

dev/tests/integration/testsuite/Magento/Catalog/Model/CategoryTreeTest.php

@@ -131,7 +131,9 @@ public function testGetChildren()
     public function testGetChildrenSorted()
     {
         $this->_model->load(2);
-        $this->assertEquals(array_diff([3, 4, 5], explode(',', $this->_model->getChildren(true))), []);
+        $unsorted = explode(',', $this->_model->getChildren());
+        usort($unsorted);
+        $this->assertEquals(array_diff($unsorted, explode(',', $this->_model->getChildren(true, true, true))), []);
     }
 
     public function testGetPathInStore()