From 1f75070b3688a83baa90c4d8a5eacc33ffc70eb3 Mon Sep 17 00:00:00 2001
From: Benjamin Reitzammer <benjamin@ambestengestern.de>
Date: Tue, 1 Mar 2016 01:19:28 +0100
Subject: [PATCH] implement clearing of checklists

---
 test/test_checklist.py | 14 +++++++++++---
 trello/checklist.py    |  8 +++++++-
 2 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/test/test_checklist.py b/test/test_checklist.py
index 8a7ca1ad..1cdd141d 100644
--- a/test/test_checklist.py
+++ b/test/test_checklist.py
@@ -83,8 +83,7 @@ def test_checklist_rename(self):
 
     def test_delete_checklist_item(self):
         name = "Testing checklist item delete"
-        description = "Description goes here"
-        card = self._list.add_card(name, description)
+        card = self._list.add_card(name, "Description goes here")
 
         name = 'Checklist'
         checklist = self._add_checklist(card, name, ['item1', 'item2'])
@@ -94,7 +93,16 @@ def test_delete_checklist_item(self):
         self.assertEqual(len(checklists[0].items), 1)
         self.assertEqual(checklists[0].items[0]['name'], 'item1')
 
-        card.delete()
+    def test_clear_checklist(self):
+        name = "Testing checklist clear"
+        card = self._list.add_card(name, "Description goes here")
+
+        name = 'Checklist'
+        checklist = self._add_checklist(card, name, ['item1', 'item2', 'item3'])
+        checklist.clear()
+
+        checklists = card.fetch_checklists()
+        self.assertEqual(len(checklists[0].items), 0)
 
 
 def suite():
diff --git a/trello/checklist.py b/trello/checklist.py
index 38ca1c18..8ecd4b66 100644
--- a/trello/checklist.py
+++ b/trello/checklist.py
@@ -43,12 +43,18 @@ def delete_checklist_item(self, name):
         if ix is None:
             return
 
-        obj = self.client.fetch_json(
+        self.client.fetch_json(
             '/checklists/'+ self.id +
             '/checkItems/'+ self.items[ix]['id'],
             http_method='DELETE')
         del self.items[ix]
 
+    def clear(self):
+        """Clear checklist by removing all checklist items"""
+        # iterate over names as list is modified while iterating and this breaks
+        # for-loops behaviour
+        for name in [item['name'] for item in self.items]:
+            self.delete_checklist_item(name)
 
     def set_checklist_item(self, name, checked):
         """Set the state of an item on this checklist