add immediate sibiling to parent op (#158)

* add imidiate sibiling to parent op

* add test

Author: AviAvni

redisgraph/execution_plan.py

@@ -164,7 +164,11 @@ def _create_operation(args):
             if op_level == level:
                 # if the operation level equal to the current level
                 # set the current operation and move next
-                current = _create_operation(current_op.split("|"))
+                child = _create_operation(current_op.split("|"))
+                if current:
+                    current = stack.pop()
+                    current.append_child(child)
+                current = child
                 i += 1
             elif op_level == level + 1:
                 # if the operation is child of the current operation

tests/functional/test_all.py

@@ -325,6 +325,25 @@ def test_explain(self):
 
         self.assertEqual(result.structured_plan, expected)
 
+        result = redis_graph.explain("""MATCH (r:Rider), (t:Team)
+                                        RETURN r.name, t.name""")
+        expected = '''\
+Results
+    Project
+        Cartesian Product
+            Node By Label Scan | (r:Rider)
+            Node By Label Scan | (t:Team)'''
+        self.assertEqual(str(result), expected)
+
+        expected = Operation('Results') \
+            .append_child(Operation('Project')
+                          .append_child(Operation('Cartesian Product')
+                                        .append_child(Operation('Node By Label Scan'))
+                                        .append_child(Operation('Node By Label Scan'))
+                                        ))
+
+        self.assertEqual(result.structured_plan, expected)
+
         redis_graph.delete()
 
     def test_profile(self):