def test_lazy_len(self):
d = LazyDict({'1':1})
self.assertEqual(len(d), 1)
d['2'] = 2
self.assertEqual(len(d), 2)
d.set_stub('3', lambda x: x)
self.assertEqual(len(d), 3)
def test_lazy_items(self):
d = LazyDict()
d.set_stub(1, lambda x:x)
self.assertEqual(set(d.items()), {(1, 1)})
d = LazyDict({1:2})
d.set_stub(2, lambda x:x)
self.assertEqual(set(d.items()), {(1, 2), (2, 2)})
def test_lazy_setdefault(self):
d = LazyDict()
self.assertIs(d.setdefault('key0'), None)
d.set_stub('key0', lambda x:'value0')
self.assertIs(d.setdefault('key0'), 'value0')
d.set_stub('key0', lambda x:'value0')
self.assertEqual(d.setdefault('key1', 'value1'), 'value1')
self.assertEqual(d['key1'], 'value1')
self.assertEqual(d.setdefault('key0', 'value2'), 'value0')
def test_lazy_clear(self):
d = LazyDict({1:1, 2:2, 3:3})
d.set_stub(4, lambda x:x)
d.clear()
self.assertEqual(d, {})
self.assertEqual(set(d.keys()), set())
self.assertEqual(set(d.values()), set())
self.assertRaises(TypeError, d.clear, None)
def test_lazy_popitem(self):
d = LazyDict({1: 1})
d.set_stub(2, lambda x:x)
k, v = d.popitem()
self.assertEqual(k, v)
k, v = d.popitem()
self.assertEqual(k, v)
self.assertEqual(k, 2)
self.assertEqual(len(d._stubs), 0)
self.assertRaises(KeyError, d.popitem)
def test_lazy_get(self):
d = LazyDict({'a': 1, 'b': 2})
d.set_stub('d', lambda x:x)
self.assertIs(d.get('c'), None)
self.assertEqual(d.get('c', 3), 3)
self.assertEqual(d.get('a'), 1)
self.assertEqual(d.get('a', 3), 1)
self.assertEqual(d.get('d'), 'd')
self.assertEqual(d.get('d', 3), 'd')
self.assertRaises(TypeError, d.get)
self.assertRaises(TypeError, d.get, None, None, None)
def test_lazy_values(self):
def resolver(id):
p = {'c': 3}
return p[id]
d = LazyDict()
self.assertEqual(set(d.values()), set())
d = LazyDict({1:2})
d.set_stub('c', resolver)
v = d.values()
self.assertEqual(set(v), {2,3})
self.assertRaises(TypeError, d.values, None)
def test_lazy_keys(self):
def resolver(id):
p = {'b': 2, 'c': 3}
return p[id]
d = LazyDict({'a': 1})
d.set_stub('b', resolver)
d.set_stub('c', resolver)
d['d'] = 4
k = d.keys()
self.assertTrue('a' in d)
self.assertTrue('b' in d)
self.assertTrue('c' in d)
self.assertTrue('d' in d)
self.assertEqual(set(k), {'a','b','c','d'})
def test_lazy_pop(self):
d = LazyDict()
k, v = ('abc', 'def')
d.set_stub(k, lambda x:'def')
self.assertRaises(KeyError, d.pop, 'ghi')
self.assertEqual(d.pop(k), v)
self.assertEqual(len(d), 0)
self.assertRaises(KeyError, d.pop, k)
self.assertEqual(d.pop(k, v), v)
d.set_stub(k, lambda x:v)
self.assertEqual(d.pop(k, 1), v)
self.assertRaises(TypeError, d.pop)
def test_lazy_delitem(self):
d = LazyDict()
d['1'] = 1
d['2'] = 2
del d['1']
self.assertEqual(len(d), 1)
self.assertRaises(KeyError, d.__getitem__, '1')
d.set_stub('1', lambda x:x)
self.assertEqual(len(d), 2)
del d['1']
self.assertEqual(len(d), 1)
self.assertRaises(KeyError, d.__getitem__, '1')
d.set_stub('1', lambda x:x)
self.assertEqual(d['1'], '1')
del d['1']
self.assertEqual(len(d), 1)
self.assertRaises(KeyError, d.__getitem__, '1')
def test_lazy_copy(self):
d = LazyDict({'1':1})
d['2'] = 2
x = d.copy()
self.assertEqual(len(x), 2)
i = {'num': 0}
def r(key, i):
i['num'] += 1
return i['num']
d.set_stub('3', r, i)
x = d.copy()
self.assertEqual(d['3'], 1)
self.assertEqual(len(d._stubs), 0)
self.assertEqual(len(x._stubs), 1)
self.assertEqual(x['3'], 2)
self.assertEqual(len(x._stubs), 0)
x = d.copy()
self.assertEqual(d['3'], 1)
self.assertEqual(x['3'], 1)
def test_lazy_update(self):
d = LazyDict()
d.set_stub(4, lambda x:x)
d.update(LazyDict({1:100}))
d.update(LazyDict({2:20}))
d.update({4:5})
d.update(LazyDict({1:1, 2:2, 3:3}))
self.assertEqual(d, {1:1, 2:2, 3:3, 4:5})
d.update()
self.assertEqual(d, {1:1, 2:2, 3:3, 4:5})
self.assertRaises((TypeError, AttributeError), d.update, None)
class SimpleUserDict:
def __init__(self):
self.d = {1:1, 2:2, 3:3}
def keys(self):
return self.d.keys()
def __getitem__(self, i):
return self.d[i]
d.clear()
d.update(SimpleUserDict())
self.assertEqual(d, {1:1, 2:2, 3:3})
