remove OD with no description in help if option remove_empty_description_od set to True

test/test_optiondescription.py

@@ -42,7 +42,7 @@ def get_config(json, has_tree=False, default_verbosity=False, add_long=False, ad
                                 'Sub-Tree 2',
                                 [str_])
     od2 = OptionDescription('od2',
-                            'Second OptionDescription',
+                            '',
                             [before, subtree, after])
     root = OptionDescription('root',
                              'root',
@@ -80,7 +80,7 @@ od1.od0:
   -nv, --od1.od0.no-verbosity
 
 od2:
-  Second OptionDescription
+  od2
 
   --od2.before BEFORE   Before
   --od2.after AFTER     After
@@ -115,7 +115,7 @@ od1.od0:
   -nv, --od1.od0.no-verbosity
 
 od2:
-  Second OptionDescription
+  od2
 
   --od2.before BEFORE   Before
   --od2.after AFTER     After
@@ -133,6 +133,38 @@ od2.subtree:
     assert f.getvalue() == output
 
 
+def test_optiondescription_help_remove_empty_description_od(json):
+    output = """usage: prog.py [-h] [-v] [-nv] --od2.subtree.str STR --od2.before BEFORE
+               --od2.after AFTER
+               {str,list,int,none}
+
+optional arguments:
+  -h, --help            show this help message and exit
+
+od1:
+  First OptionDescription
+
+od1.od0:
+  Sub-Tree 1
+
+  {str,list,int,none}   choice the sub argument
+  -v, --od1.od0.verbosity
+                        increase output verbosity
+  -nv, --od1.od0.no-verbosity
+
+od2.subtree:
+  Sub-Tree 2
+
+  --od2.subtree.str STR
+                        string option 2
+"""
+    parser = TiramisuCmdlineParser(get_config(json), 'prog.py', remove_empty_description_od=True)
+    f = StringIO()
+    with redirect_stdout(f):
+        parser.print_help()
+    assert f.getvalue() == output
+
+
 def test_optiondescription_help_subtree(json):
     output = """usage: prog.py [-h] --od2.subtree.str STR --od2.before BEFORE --od2.after
                AFTER