"""Unit tests for collections.py.""" import unittest, doctest from test import support from collections import namedtuple from collections import Hashable, Iterable, Iterator from collections import Sized, Container, Callable from collections import Set, MutableSet from collections import Mapping, MutableMapping from collections import Sequence, MutableSequence from collections import ByteString class TestNamedTuple(unittest.TestCase): def test_factory(self): Point = namedtuple('Point', 'x y') self.assertEqual(Point.__name__, 'Point') self.assertEqual(Point.__doc__, 'Point(x, y)') self.assertEqual(Point.__slots__, ()) self.assertEqual(Point.__module__, __name__) self.assertEqual(Point.__getitem__, tuple.__getitem__) self.assertEqual(Point._fields, ('x', 'y')) self.assertRaises(ValueError, namedtuple, 'abc%', 'efg ghi') # type has non-alpha char self.assertRaises(ValueError, namedtuple, 'class', 'efg ghi') # type has keyword self.assertRaises(ValueError, namedtuple, '9abc', 'efg ghi') # type starts with digit self.assertRaises(ValueError, namedtuple, 'abc', 'efg g%hi') # field with non-alpha char self.assertRaises(ValueError, namedtuple, 'abc', 'abc class') # field has keyword self.assertRaises(ValueError, namedtuple, 'abc', '8efg 9ghi') # field starts with digit self.assertRaises(ValueError, namedtuple, 'abc', '_efg ghi') # field with leading underscore self.assertRaises(ValueError, namedtuple, 'abc', 'efg efg ghi') # duplicate field namedtuple('Point0', 'x1 y2') # Verify that numbers are allowed in names namedtuple('_', 'a b c') # Test leading underscores in a typename self.assertRaises(TypeError, Point._make, [11]) # catch too few args self.assertRaises(TypeError, Point._make, [11, 22, 33]) # catch too many args def test_instance(self): Point = namedtuple('Point', 'x y') p = Point(11, 22) self.assertEqual(p, Point(x=11, y=22)) self.assertEqual(p, Point(11, y=22)) self.assertEqual(p, Point(y=22, x=11)) self.assertEqual(p, Point(*(11, 22))) self.assertEqual(p, Point(**dict(x=11, y=22))) self.assertRaises(TypeError, Point, 1) # too few args self.assertRaises(TypeError, Point, 1, 2, 3) # too many args self.assertRaises(TypeError, eval, 'Point(XXX=1, y=2)', locals()) # wrong keyword argument self.assertRaises(TypeError, eval, 'Point(x=1)', locals()) # missing keyword argument self.assertEqual(repr(p), 'Point(x=11, y=22)') self.assert_('__dict__' not in dir(p)) # verify instance has no dict self.assert_('__weakref__' not in dir(p)) self.assertEqual(p, Point._make([11, 22])) # test _make classmethod self.assertEqual(p._fields, ('x', 'y')) # test _fields attribute self.assertEqual(p._replace(x=1), (1, 22)) # test _replace method self.assertEqual(p._asdict(), dict(x=11, y=22)) # test _asdict method try: p._replace(x=1, error=2) except ValueError: pass else: self._fail('Did not detect an incorrect fieldname') # verify that field string can have commas Point = namedtuple('Point', 'x, y') p = Point(x=11, y=22) self.assertEqual(repr(p), 'Point(x=11, y=22)') # verify that fieldspec can be a non-string sequence Point = namedtuple('Point', ('x', 'y')) p = Point(x=11, y=22) self.assertEqual(repr(p), 'Point(x=11, y=22)') def test_tupleness(self): Point = namedtuple('Point', 'x y') p = Point(11, 22) self.assert_(isinstance(p, tuple)) self.assertEqual(p, (11, 22)) # matches a real tuple self.assertEqual(tuple(p), (11, 22)) # coercable to a real tuple self.assertEqual(list(p), [11, 22]) # coercable to a list self.assertEqual(max(p), 22) # iterable self.assertEqual(max(*p), 22) # star-able x, y = p self.assertEqual(p, (x, y)) # unpacks like a tuple self.assertEqual((p[0], p[1]), (11, 22)) # indexable like a tuple self.assertRaises(IndexError, p.__getitem__, 3) self.assertEqual(p.x, x) self.assertEqual(p.y, y) self.assertRaises(AttributeError, eval, 'p.z', locals()) def test_odd_sizes(self): Zero = namedtuple('Zero', '') self.assertEqual(Zero(), ()) self.assertEqual(Zero._make([]), ()) self.assertEqual(repr(Zero()), 'Zero()') self.assertEqual(Zero()._asdict(), {}) self.assertEqual(Zero()._fields, ()) Dot = namedtuple('Dot', 'd') self.assertEqual(Dot(1), (1,)) self.assertEqual(Dot._make([1]), (1,)) self.assertEqual(Dot(1).d, 1) self.assertEqual(repr(Dot(1)), 'Dot(d=1)') self.assertEqual(Dot(1)._asdict(), {'d':1}) self.assertEqual(Dot(1)._replace(d=999), (999,)) self.assertEqual(Dot(1)._fields, ('d',)) # n = 10000 n = 254 # SyntaxError: more than 255 arguments: import string, random names = [''.join([random.choice(string.ascii_letters) for j in range(10)]) for i in range(n)] Big = namedtuple('Big', names) b = Big(*range(n)) self.assertEqual(b, tuple(range(n))) self.assertEqual(Big._make(range(n)), tuple(range(n))) for pos, name in enumerate(names): self.assertEqual(getattr(b, name), pos) repr(b) # make sure repr() doesn't blow-up d = b._asdict() d_expected = dict(zip(names, range(n))) self.assertEqual(d, d_expected) b2 = b._replace(**dict([(names[1], 999),(names[-5], 42)])) b2_expected = list(range(n)) b2_expected[1] = 999 b2_expected[-5] = 42 self.assertEqual(b2, tuple(b2_expected)) self.assertEqual(b._fields, tuple(names)) class TestOneTrickPonyABCs(unittest.TestCase): def test_Hashable(self): # Check some non-hashables non_samples = [bytearray(), list(), set(), dict()] for x in non_samples: self.failIf(isinstance(x, Hashable), repr(x)) self.failIf(issubclass(type(x), Hashable), repr(type(x))) # Check some hashables samples = [None, int(), float(), complex(), str(), tuple(), frozenset(), int, list, object, type, bytes() ] for x in samples: self.failUnless(isinstance(x, Hashable), repr(x)) self.failUnless(issubclass(type(x), Hashable), repr(type(x))) self.assertRaises(TypeError, Hashable) # Check direct subclassing class H(Hashable): def __hash__(self): return super().__hash__() self.assertEqual(hash(H()), 0) self.failIf(issubclass(int, H)) def test_Iterable(self): # Check some non-iterables non_samples = [None, 42, 3.14, 1j] for x in non_samples: self.failIf(isinstance(x, Iterable), repr(x)) self.failIf(issubclass(type(x), Iterable), repr(type(x))) # Check some iterables samples = [bytes(), str(), tuple(), list(), set(), frozenset(), dict(), dict().keys(), dict().items(), dict().values(), (lambda: (yield))(), (x for x in []), ] for x in samples: self.failUnless(isinstance(x, Iterable), repr(x)) self.failUnless(issubclass(type(x), Iterable), repr(type(x))) # Check direct subclassing class I(Iterable): def __iter__(self): return super().__iter__() self.assertEqual(list(I()), []) self.failIf(issubclass(str, I)) def test_Iterator(self): non_samples = [None, 42, 3.14, 1j, b"", "", (), [], {}, set()] for x in non_samples: self.failIf(isinstance(x, Iterator), repr(x)) self.failIf(issubclass(type(x), Iterator), repr(type(x))) samples = [iter(bytes()), iter(str()), iter(tuple()), iter(list()), iter(dict()), iter(set()), iter(frozenset()), iter(dict().keys()), iter(dict().items()), iter(dict().values()), (lambda: (yield))(), (x for x in []), ] for x in samples: self.failUnless(isinstance(x, Iterator), repr(x)) self.failUnless(issubclass(type(x), Iterator), repr(type(x))) def test_Sized(self): non_samples = [None, 42, 3.14, 1j, (lambda: (yield))(), (x for x in []), ] for x in non_samples: self.failIf(isinstance(x, Sized), repr(x)) self.failIf(issubclass(type(x), Sized), repr(type(x))) samples = [bytes(), str(), tuple(), list(), set(), frozenset(), dict(), dict().keys(), dict().items(), dict().values(), ] for x in samples: self.failUnless(isinstance(x, Sized), repr(x)) self.failUnless(issubclass(type(x), Sized), repr(type(x))) def test_Container(self): non_samples = [None, 42, 3.14, 1j, (lambda: (yield))(), (x for x in []), ] for x in non_samples: self.failIf(isinstance(x, Container), repr(x)) self.failIf(issubclass(type(x), Container), repr(type(x))) samples = [bytes(), str(), tuple(), list(), set(), frozenset(), dict(), dict().keys(), dict().items(), ] for x in samples: self.failUnless(isinstance(x, Container), repr(x)) self.failUnless(issubclass(type(x), Container), repr(type(x))) def test_Callable(self): non_samples = [None, 42, 3.14, 1j, "", b"", (), [], {}, set(), (lambda: (yield))(), (x for x in []), ] for x in non_samples: self.failIf(isinstance(x, Callable), repr(x)) self.failIf(issubclass(type(x), Callable), repr(type(x))) samples = [lambda: None, type, int, object, len, list.append, [].append, ] for x in samples: self.failUnless(isinstance(x, Callable), repr(x)) self.failUnless(issubclass(type(x), Callable), repr(type(x))) def test_direct_subclassing(self): for B in Hashable, Iterable, Iterator, Sized, Container, Callable: class C(B): pass self.failUnless(issubclass(C, B)) self.failIf(issubclass(int, C)) def test_registration(self): for B in Hashable, Iterable, Iterator, Sized, Container, Callable: class C: __hash__ = None # Make sure it isn't hashable by default self.failIf(issubclass(C, B), B.__name__) B.register(C) self.failUnless(issubclass(C, B)) class TestCollectionABCs(unittest.TestCase): # XXX For now, we only test some virtual inheritance properties. # We should also test the proper behavior of the collection ABCs # as real base classes or mix-in classes. def test_Set(self): for sample in [set, frozenset]: self.failUnless(isinstance(sample(), Set)) self.failUnless(issubclass(sample, Set)) def test_MutableSet(self): self.failUnless(isinstance(set(), MutableSet)) self.failUnless(issubclass(set, MutableSet)) self.failIf(isinstance(frozenset(), MutableSet)) self.failIf(issubclass(frozenset, MutableSet)) def test_Mapping(self): for sample in [dict]: self.failUnless(isinstance(sample(), Mapping)) self.failUnless(issubclass(sample, Mapping)) def test_MutableMapping(self): for sample in [dict]: self.failUnless(isinstance(sample(), MutableMapping)) self.failUnless(issubclass(sample, MutableMapping)) def test_Sequence(self): for sample in [tuple, list, bytes, str]: self.failUnless(isinstance(sample(), Sequence)) self.failUnless(issubclass(sample, Sequence)) self.failUnless(issubclass(str, Sequence)) def test_ByteString(self): for sample in [bytes, bytearray]: self.failUnless(isinstance(sample(), ByteString)) self.failUnless(issubclass(sample, ByteString)) for sample in [str, list, tuple]: self.failIf(isinstance(sample(), ByteString)) self.failIf(issubclass(sample, ByteString)) self.failIf(isinstance(memoryview(b""), ByteString)) self.failIf(issubclass(memoryview, ByteString)) def test_MutableSequence(self): for sample in [tuple, str, bytes]: self.failIf(isinstance(sample(), MutableSequence)) self.failIf(issubclass(sample, MutableSequence)) for sample in [list, bytearray]: self.failUnless(isinstance(sample(), MutableSequence)) self.failUnless(issubclass(sample, MutableSequence)) self.failIf(issubclass(str, MutableSequence)) import doctest, collections def test_main(verbose=None): NamedTupleDocs = doctest.DocTestSuite(module=collections) test_classes = [TestNamedTuple, NamedTupleDocs, TestOneTrickPonyABCs, TestCollectionABCs] support.run_unittest(*test_classes) support.run_doctest(collections, verbose) if __name__ == "__main__": test_main(verbose=True)