Fixes `__setitem__` on parser['DEFAULT'] reported in issue #16820.
diff --git a/Lib/test/test_configparser.py b/Lib/test/test_configparser.py
index 37dee74..3823641 100644
--- a/Lib/test/test_configparser.py
+++ b/Lib/test/test_configparser.py
@@ -797,6 +797,34 @@
self.assertEqual(set(cf.sections()), set())
self.assertEqual(set(cf[self.default_section].keys()), {'foo'})
+ def test_setitem(self):
+ cf = self.fromstring("""
+ [section1]
+ name1 {0[0]} value1
+ [section2]
+ name2 {0[0]} value2
+ [section3]
+ name3 {0[0]} value3
+ """.format(self.delimiters), defaults={"nameD": "valueD"})
+ self.assertEqual(set(cf['section1'].keys()), {'name1', 'named'})
+ self.assertEqual(set(cf['section2'].keys()), {'name2', 'named'})
+ self.assertEqual(set(cf['section3'].keys()), {'name3', 'named'})
+ self.assertEqual(cf['section1']['name1'], 'value1')
+ self.assertEqual(cf['section2']['name2'], 'value2')
+ self.assertEqual(cf['section3']['name3'], 'value3')
+ cf['section2'] = {'name22': 'value22'}
+ self.assertEqual(set(cf['section2'].keys()), {'name22', 'named'})
+ self.assertEqual(cf['section2']['name22'], 'value22')
+ self.assertNotIn('name2', cf['section2'])
+ cf['section3'] = {}
+ self.assertEqual(set(cf['section3'].keys()), {'named'})
+ self.assertNotIn('name3', cf['section3'])
+ cf[self.default_section] = {}
+ self.assertEqual(set(cf[self.default_section].keys()), set())
+ self.assertEqual(set(cf['section1'].keys()), {'name1'})
+ self.assertEqual(set(cf['section2'].keys()), {'name22'})
+ self.assertEqual(set(cf['section3'].keys()), set())
+
class StrictTestCase(BasicTestCase):
config_class = configparser.RawConfigParser