Merge pull request #125 from PyCQA/fix_append_call_break_help

Fix append call breaks help

CHANGELOG

 Changelog
 =========
+0.6.3 (unreleased)
+-----------------
+
+- fix help() after append
+
 0.6.2 (2016-10-03)
 ----------------

redbaron/base_nodes.py

@@ -632,7 +632,10 @@ class Node(GenericNodesUtils):
         if self.on_attribute is "root":
             in_list = self.parent
         elif self.on_attribute is not None:
-            in_list = getattr(self.parent, self.on_attribute)
+            if isinstance(self.parent, NodeList):
+                in_list = getattr(self.parent.parent, self.on_attribute)
+            else:
+                in_list = getattr(self.parent, self.on_attribute)
         else:
             return None
@@ -865,35 +868,35 @@ class Node(GenericNodesUtils):
     def _get_helpers(self):
         not_helpers = set([
             'copy',
+            'decrease_indentation',
             'dumps',
+            'edit',
             'find',
-            'findAll',
             'find_all',
-            'fst',
-            'help',
-            'next_generator',
-            'previous_generator',
-            'get_indentation_node',
-            'indentation_node_is_direct',
-            'parent_find',
-            'path',
+            'findAll',
             'find_by_path',
-            'replace',
-            'edit',
-            'increase_indentation',
-            'decrease_indentation',
-            'has_render_key',
-            'get_absolute_bounding_box_of_attribute',
             'find_by_position',
-            'parse_code_block',
-            'parse_decorators',
             'from_fst',
+            'fst',
+            'generate_identifiers',
+            'get_absolute_bounding_box_of_attribute',
+            'get_indentation_node',
+            'has_render_key',
+            'help',
+            'increase_indentation',
+            'indentation_node_is_direct',
             'index_on_parent',
             'index_on_parent_raw',
-            'insert_before',
             'insert_after',
+            'insert_before',
+            'next_generator',
+            'parent_find',
+            'parse_code_block',
+            'parse_decorators',
+            'path',
+            'previous_generator',
+            'replace',
             'to_python',
-            'generate_identifiers',
         ])
         return [x for x in dir(self) if
                 not x.startswith("_") and x not in not_helpers and inspect.ismethod(getattr(self, x))]

tests/test_initial_parsing.py

@@ -99,11 +99,49 @@ def test_get_helpers():
     assert red[0]._get_helpers() == ['modules', 'names']
-def test_help_is_not_crashing():
+def test_help_is_not_crashing1():
     some_code = "ax + (z * 4)"
     red = RedBaron(some_code)
     red.help()
     red[0].help()
+    red.help(5)
+    red[0].help(5)
+    red.help(True)
+    red[0].help(True)
+
+
+def test_help_is_not_crashing2():
+    some_code = "a(b)"
+    red = RedBaron(some_code)
+    red.help()
+    red[0].help()
+    red.help(5)
+    red[0].help(5)
+    red.help(True)
+    red[0].help(True)
+
+
+def test_help_is_not_crashing3():
+    some_code = "a(b, c)"
+    red = RedBaron(some_code)
+    red.help()
+    red[0].help()
+    red.help(5)
+    red[0].help(5)
+    red.help(True)
+    red[0].help(True)
+
+
+def test_help_is_not_crashing4():
+    some_code = "a(b)"
+    red = RedBaron(some_code)
+    red[0].call.append("c")
+    red.help()
+    red[0].help()
+    red.help(5)
+    red[0].help(5)
+    red.help(True)
+    red[0].help(True)
 def test_assign_on_string_value():