"""Unit tests for collections.py.""" import unittest from test import test_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 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.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 double underscores self.assertRaises(ValueError, namedtuple, 'abc', 'efg efg ghi') # duplicate field namedtuple('Point0', 'x1 y2') # Verify that numbers are allowed in names 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.__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 __dict__ method # Verify that __fields__ is read-only try: p.__fields__ = ('F1' ,'F2') except AttributeError: pass else: self.fail('The __fields__ attribute needs to be read-only') # 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(), ()) Dot = namedtuple('Dot', 'd') self.assertEqual(Dot(1), (1,)) class TestOneTrickPonyABCs(unittest.TestCase): def test_Hashable(self): # Check some non-hashables non_samples = [buffer(), 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_MutableSequence(self): for sample in [tuple, str]: self.failIf(isinstance(sample(), MutableSequence)) self.failIf(issubclass(sample, MutableSequence)) for sample in [list, bytes]: self.failUnless(isinstance(sample(), MutableSequence)) self.failUnless(issubclass(sample, MutableSequence)) self.failIf(issubclass(str, MutableSequence)) def test_main(verbose=None): import collections as CollectionsModule test_classes = [TestNamedTuple, TestOneTrickPonyABCs, TestCollectionABCs] test_support.run_unittest(*test_classes) test_support.run_doctest(CollectionsModule, verbose) if __name__ == "__main__": test_main(verbose=True)