def test_multiple_dicts(self):
a = {'a': 1, 'b': 2, 'c': 3}
b = {'a': 4, 'b': 5, 'c': 6}
c = {'a': 7, 'b': 8, 'c': 9}
predicate = lambda *args: any(x % 4 == 0 for x in args)
result = nested.filter(predicate, a, b, c)
self.assertEqual({'a': (1, 4, 7), 'b': (2, 5, 8)}, result)
def test_multiple_lists(self):
a = [1, 2, 3]
b = [4, 5, 6]
c = [7, 8, 9]
predicate = lambda *args: any(x % 4 == 0 for x in args)
result = nested.filter(predicate, a, b, c)
self.assertEqual([(1, 4, 7), (2, 5, 8)], result)
def test_namedtuple_nested(self):
Foo = collections.namedtuple('Foo', 'value1, value2')
foo = Foo(1, [1, 2, 3])
self.assertEqual(Foo(None, [2, 3]),
nested.filter(lambda x: x > 1, foo))
def test_namedtuple_multiple(self):
Foo = collections.namedtuple('Foo', 'value1, value2')
foo = Foo(1, 2)
bar = Foo(2, 3)
result = nested.filter(lambda x, y: x + y > 3, foo, bar)
self.assertEqual(Foo(None, (2, 3)), result)
def test_namedtuple(self):
Foo = collections.namedtuple('Foo', 'value1, value2')
self.assertEqual(Foo(1, None),
nested.filter(lambda x: x == 1, Foo(1, 2)))
def test_remove_empty_containers(self):
data = [(1, 2, 3), 4, {'foo': [5, 6], 'bar': 7}]
self.assertEqual([], nested.filter(lambda x: False, data))
def test_mixed_structure(self):
predicate = lambda x: x % 2 == 0
data = [(1, 2), 3, {'foo': [4]}]
self.assertEqual([(2, ), {'foo': [4]}], nested.filter(predicate, data))
def test_single_dict(self):
predicate = lambda x: x % 2 == 0
data = {'a': 1, 'b': 2, 'c': 3, 'd': 4}
self.assertEqual({'b': 2, 'd': 4}, nested.filter(predicate, data))
def test_base_case(self):
self.assertEqual((), nested.filter(lambda x: False, 1))
def test_empty(self):
self.assertEqual({}, nested.filter(lambda x: True, {}))
self.assertEqual({}, nested.filter(lambda x: False, {}))