def should_return_false_for_decimals():
assert is_collection(Decimal("1.0")) is False
assert is_collection(Decimal("-1.0")) is False
assert is_collection(Decimal("0.0")) is False
assert is_collection(Decimal("NaN")) is False
assert is_collection(Decimal("Inf")) is False
assert is_collection(Decimal("-Inf")) is False
def should_return_false_for_floats():
assert is_collection(1.0) is False
assert is_collection(-1.0) is False
assert is_collection(0.0) is False
assert is_collection(float("NaN")) is False
assert is_collection(float("Inf")) is False
assert is_collection(float("-Inf")) is False
def a_keys_view_is_a_collection():
assert is_collection({}.keys()) is True
assert is_collection({1: 2, 3: 4}.keys()) is True
def should_return_true_for_sets():
assert is_collection(set()) is True
assert is_collection({0, 1, 2}) is True
assert is_collection({"A", "B", "C"}) is True
def should_return_false_for_booleans():
assert is_collection(True) is False
assert is_collection(False) is False
def should_return_false_for_byte_strings():
assert is_collection(b"ABC") is False
assert is_collection(b"0") is False
assert is_collection(b"") is False
def should_return_false_for_infinite_generators():
assert is_collection(count()) is False
def should_return_false_for_range_function():
assert is_collection(range) is False
def should_return_false_for_frozen_dicts():
assert is_collection(FrozenDict()) is False
assert is_collection(FrozenDict({"__iter__": True})) is False
assert is_collection(FrozenDict({0: "A", 1: "B", 2: "C"})) is False
def null_is_not_a_collection():
assert is_collection(None) is False
def a_frozen_dict_is_not_a_collection():
assert is_collection(FrozenDict()) is False
assert is_collection(FrozenDict({1: 2, 3: 4})) is False
def a_frozen_list_is_a_collection():
assert is_collection(FrozenList()) is True
assert is_collection(FrozenList([1, 2, 3])) is True
def an_infinite_generator_is_not_a_collection():
assert is_collection(count()) is False
def a_range_is_a_collection():
assert is_collection(range(10)) is True
def a_values_view_is_a_collection():
assert is_collection({}.values()) is True
assert is_collection({1: 2, 3: 4}.values()) is True
def should_return_true_for_values_view():
assert is_collection({}.values()) is True
assert is_collection({0: "A", 1: "B", 2: "C"}.values()) is True
def should_return_true_for_ranges():
assert is_collection(range(10)) is True
def should_return_false_for_default_dicts():
assert is_collection(defaultdict(list)) is False
def should_return_false_for_generator_function():
assert is_collection(count) is False
def should_return_false_for_simple_objects():
assert is_collection(object) is False
assert is_collection(object()) is False
def should_return_false_for_none_object():
assert is_collection(None) is False
def should_return_false_for_invalid_iterator_object():
class NoIterator:
__iter__ = None
assert is_collection(NoIterator) is False
assert is_collection(NoIterator()) is False
def should_return_false_for_ints():
assert is_collection(1) is False
assert is_collection(-1) is False
assert is_collection(0) is False
def should_return_true_for_frozen_lists():
assert is_collection(FrozenList()) is True
assert is_collection(FrozenList([0, 1, 2])) is True
assert is_collection(FrozenList(["A", "B", "C"])) is True
def should_return_true_for_tuples():
assert is_collection(()) is True
assert is_collection((0, 1, 1)) is True
assert is_collection(("A", "B", "C")) is True
def should_return_true_for_named_tuples():
named = namedtuple("named", "A B C")
assert is_collection(named(0, 1, 2)) is True
def should_return_true_for_lists():
assert is_collection([]) is True
assert is_collection([0, 1, 2]) is True
assert is_collection(["A", "B", "C"]) is True
def should_return_true_for_arrays():
assert is_collection(array("b")) is True
assert is_collection(array("b", [0, 1, 2])) is True
assert is_collection(array("i")) is True
assert is_collection(array("i", [0, 1, 2])) is True
def should_return_false_for_dicts():
assert is_collection({}) is False
assert is_collection({"__iter__": True}) is False
assert is_collection({0: "A", 1: "B", 2: "C"}) is False
def a_defaultdict_is_not_a_collection():
assert is_collection(defaultdict(list)) is False
