def testGetOverridden(self):
parent = chain_dict.ChainDict(None)
d = chain_dict.ChainDict(parent)
parent['KEY'] = 'VALUE'
d['KEY'] = 'OTHER_VALUE'
self.assertEqual('VALUE', parent['KEY'])
self.assertEqual('OTHER_VALUE', d['KEY'])
def testGetNotInParent(self):
parent = chain_dict.ChainDict(None)
d = chain_dict.ChainDict(parent)
with self.assertRaises(KeyError):
# pylint: disable=pointless-statement
parent['KEY']
with self.assertRaises(KeyError):
# pylint: disable=pointless-statement
d['KEY']
def testIteration(self):
parent = chain_dict.ChainDict(None)
d = chain_dict.ChainDict(parent)
parent['KEY'] = 'VALUE'
d['KEY'] = 'OTHER_VALUE'
d['OTHER_KEY'] = 'YAV'
self.assertEqual([('KEY', 'OTHER_VALUE'), ('OTHER_KEY', 'YAV')],
sorted(d.items()))
self.assertEqual([('KEY', 'VALUE')], sorted(parent.items()))
def testLen(self):
parent = chain_dict.ChainDict(None)
d = chain_dict.ChainDict(parent)
self.assertEqual(0, len(d))
self.assertEqual(0, len(parent))
parent['KEY'] = 'VALUE'
self.assertEqual(1, len(d))
self.assertEqual(1, len(parent))
d['KEY'] = 'OTHER_VALUE'
self.assertEqual(1, len(d))
self.assertEqual(1, len(parent))
d['OTHER_KEY'] = 'YAV'
self.assertEqual(2, len(d))
self.assertEqual(1, len(parent))
def testPlainDictParent(self):
d = chain_dict.ChainDict({'KEY': 'VALUE'})
self.assertEqual('VALUE', d['KEY'])
self.assertEqual(len(d), 1)
# In Python 3, items produces an iterator.
self.assertEqual(list(d.items()), [('KEY', 'VALUE')])
def testGetInParent(self):
parent = chain_dict.ChainDict(None)
d = chain_dict.ChainDict(parent)
parent['KEY'] = 'VALUE'
self.assertEqual('VALUE', parent['KEY'])
self.assertEqual('VALUE', d['KEY'])
def testGetAbsentNoParent(self):
d = chain_dict.ChainDict(None)
with self.assertRaises(KeyError):
# pylint: disable=pointless-statement
d['KEY']
def testGetNoParent(self):
d = chain_dict.ChainDict(None)
d['KEY'] = 'VALUE'
self.assertEqual('VALUE', d['KEY'])
def testSet(self):
d = chain_dict.ChainDict(None)
d['KEY'] = 'VALUE'
self.assertEqual({'KEY': 'VALUE'}, d._map)