/
test_typeguard.py
1444 lines (1082 loc) · 43 KB
/
test_typeguard.py
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import gc
import sys
import warnings
from concurrent.futures import ThreadPoolExecutor
from functools import wraps, partial, lru_cache
from io import StringIO, BytesIO
from unittest.mock import Mock, MagicMock
from typing import (
Any, Callable, Dict, List, Set, Tuple, Union, TypeVar, Sequence, NamedTuple, Iterable,
Container, Generic, BinaryIO, TextIO, Generator, Iterator, AbstractSet, AnyStr, Type)
import pytest
from typing_extensions import NoReturn, Protocol, Literal, TypedDict, runtime_checkable
from typeguard import (
typechecked, check_argument_types, qualified_name, TypeChecker, TypeWarning, function_name,
check_type, TypeHintWarning, ForwardRefPolicy, check_return_type)
try:
from typing import Collection
except ImportError:
# Python 3.6.0+
Collection = None
TBound = TypeVar('TBound', bound='Parent')
TConstrained = TypeVar('TConstrained', 'Parent', 'Child')
JSONType = Union[str, int, float, bool, None, List['JSONType'], Dict[str, 'JSONType']]
class Parent:
pass
class Child(Parent):
def method(self, a: int):
pass
class StaticProtocol(Protocol):
def meth(self) -> None:
...
@runtime_checkable
class RuntimeProtocol(Protocol):
def meth(self) -> None:
...
@pytest.fixture(params=[Mock, MagicMock], ids=['mock', 'magicmock'])
def mock_class(request):
return request.param
@pytest.mark.parametrize('inputval, expected', [
(qualified_name, 'function'),
(Child(), 'test_typeguard.Child'),
(int, 'int')
], ids=['func', 'instance', 'builtintype'])
def test_qualified_name(inputval, expected):
assert qualified_name(inputval) == expected
def test_function_name():
assert function_name(function_name) == 'typeguard.function_name'
def test_check_type_no_memo():
check_type('foo', [1], List[int])
def test_check_type_no_memo_fail():
pytest.raises(TypeError, check_type, 'foo', ['a'], List[int]).\
match(r'type of foo\[0\] must be int; got str instead')
@pytest.mark.parametrize('value', ['bar', b'bar'], ids=['str', 'bytes'])
def test_check_type_anystr(value):
check_type('foo', value, AnyStr)
def test_check_type_anystr_fail():
pytest.raises(TypeError, check_type, 'foo', int, AnyStr).\
match(r'type of foo must be one of \(bytes, str\); got type instead')
def test_check_return_type():
def foo() -> int:
assert check_return_type(0)
return 0
foo()
def test_check_return_type_fail():
def foo() -> int:
assert check_return_type('foo')
return 1
pytest.raises(TypeError, foo).match('type of the return value must be int; got str instead')
def test_check_recursive_type():
check_type('foo', {'a': [1, 2, 3]}, JSONType)
pytest.raises(TypeError, check_type, 'foo', {'a': (1, 2, 3)}, JSONType, globals=globals()).\
match(r'type of foo must be one of \(str, int, float, (bool, )?NoneType, '
r'List, Dict\); got dict instead')
class TestCheckArgumentTypes:
def test_any_type(self):
def foo(a: Any):
assert check_argument_types()
foo('aa')
def test_mock_value(self, mock_class):
def foo(a: str, b: int, c: dict, d: Any) -> int:
assert check_argument_types()
foo(mock_class(), mock_class(), mock_class(), mock_class())
def test_callable_exact_arg_count(self):
def foo(a: Callable[[int, str], int]):
assert check_argument_types()
def some_callable(x: int, y: str) -> int:
pass
foo(some_callable)
def test_callable_bad_type(self):
def foo(a: Callable[..., int]):
assert check_argument_types()
exc = pytest.raises(TypeError, foo, 5)
assert str(exc.value) == 'argument "a" must be a callable'
def test_callable_too_few_arguments(self):
def foo(a: Callable[[int, str], int]):
assert check_argument_types()
def some_callable(x: int) -> int:
pass
exc = pytest.raises(TypeError, foo, some_callable)
assert str(exc.value) == (
'callable passed as argument "a" has too few arguments in its declaration; expected 2 '
'but 1 argument(s) declared')
def test_callable_too_many_arguments(self):
def foo(a: Callable[[int, str], int]):
assert check_argument_types()
def some_callable(x: int, y: str, z: float) -> int:
pass
exc = pytest.raises(TypeError, foo, some_callable)
assert str(exc.value) == (
'callable passed as argument "a" has too many arguments in its declaration; expected '
'2 but 3 argument(s) declared')
def test_callable_mandatory_kwonlyargs(self):
def foo(a: Callable[[int, str], int]):
assert check_argument_types()
def some_callable(x: int, y: str, *, z: float, bar: str) -> int:
pass
exc = pytest.raises(TypeError, foo, some_callable)
assert str(exc.value) == (
'callable passed as argument "a" has mandatory keyword-only arguments in its '
'declaration: z, bar')
def test_callable_class(self):
"""
Test that passing a class as a callable does not count the "self" argument "a"gainst the
ones declared in the Callable specification.
"""
def foo(a: Callable[[int, str], Any]):
assert check_argument_types()
class SomeClass:
def __init__(self, x: int, y: str):
pass
foo(SomeClass)
def test_callable_plain(self):
def foo(a: Callable):
assert check_argument_types()
def callback(a):
pass
foo(callback)
def test_callable_partial_class(self):
"""
Test that passing a bound method as a callable does not count the "self" argument "a"gainst
the ones declared in the Callable specification.
"""
def foo(a: Callable[[int], Any]):
assert check_argument_types()
class SomeClass:
def __init__(self, x: int, y: str):
pass
foo(partial(SomeClass, y='foo'))
def test_callable_bound_method(self):
"""
Test that passing a bound method as a callable does not count the "self" argument "a"gainst
the ones declared in the Callable specification.
"""
def foo(callback: Callable[[int], Any]):
assert check_argument_types()
foo(Child().method)
def test_callable_partial_bound_method(self):
"""
Test that passing a bound method as a callable does not count the "self" argument "a"gainst
the ones declared in the Callable specification.
"""
def foo(callback: Callable[[], Any]):
assert check_argument_types()
foo(partial(Child().method, 1))
def test_callable_defaults(self):
"""
Test that a callable having "too many" arguments don't raise an error if the extra
arguments have default values.
"""
def foo(callback: Callable[[int, str], Any]):
assert check_argument_types()
def some_callable(x: int, y: str, z: float = 1.2) -> int:
pass
foo(some_callable)
def test_callable_builtin(self):
"""
Test that checking a Callable annotation against a builtin callable does not raise an
error.
"""
def foo(callback: Callable[[int], Any]):
assert check_argument_types()
foo([].append)
def test_dict_bad_type(self):
def foo(a: Dict[str, int]):
assert check_argument_types()
exc = pytest.raises(TypeError, foo, 5)
assert str(exc.value) == (
'type of argument "a" must be a dict; got int instead')
def test_dict_bad_key_type(self):
def foo(a: Dict[str, int]):
assert check_argument_types()
exc = pytest.raises(TypeError, foo, {1: 2})
assert str(exc.value) == 'type of keys of argument "a" must be str; got int instead'
def test_dict_bad_value_type(self):
def foo(a: Dict[str, int]):
assert check_argument_types()
exc = pytest.raises(TypeError, foo, {'x': 'a'})
assert str(exc.value) == "type of argument \"a\"['x'] must be int; got str instead"
def test_list_bad_type(self):
def foo(a: List[int]):
assert check_argument_types()
exc = pytest.raises(TypeError, foo, 5)
assert str(exc.value) == (
'type of argument "a" must be a list; got int instead')
def test_list_bad_element(self):
def foo(a: List[int]):
assert check_argument_types()
exc = pytest.raises(TypeError, foo, [1, 2, 'bb'])
assert str(exc.value) == (
'type of argument "a"[2] must be int; got str instead')
def test_sequence_bad_type(self):
def foo(a: Sequence[int]):
assert check_argument_types()
exc = pytest.raises(TypeError, foo, 5)
assert str(exc.value) == (
'type of argument "a" must be a sequence; got int instead')
def test_sequence_bad_element(self):
def foo(a: Sequence[int]):
assert check_argument_types()
exc = pytest.raises(TypeError, foo, [1, 2, 'bb'])
assert str(exc.value) == (
'type of argument "a"[2] must be int; got str instead')
def test_abstractset_custom_type(self):
class DummySet(AbstractSet[int]):
def __contains__(self, x: object) -> bool:
return x == 1
def __len__(self) -> int:
return 1
def __iter__(self) -> Iterator[int]:
yield 1
def foo(a: AbstractSet[int]):
assert check_argument_types()
foo(DummySet())
def test_abstractset_bad_type(self):
def foo(a: AbstractSet[int]):
assert check_argument_types()
exc = pytest.raises(TypeError, foo, 5)
assert str(exc.value) == 'type of argument "a" must be a set; got int instead'
def test_set_bad_type(self):
def foo(a: Set[int]):
assert check_argument_types()
exc = pytest.raises(TypeError, foo, 5)
assert str(exc.value) == 'type of argument "a" must be a set; got int instead'
def test_abstractset_bad_element(self):
def foo(a: AbstractSet[int]):
assert check_argument_types()
exc = pytest.raises(TypeError, foo, {1, 2, 'bb'})
assert str(exc.value) == (
'type of elements of argument "a" must be int; got str instead')
def test_set_bad_element(self):
def foo(a: Set[int]):
assert check_argument_types()
exc = pytest.raises(TypeError, foo, {1, 2, 'bb'})
assert str(exc.value) == (
'type of elements of argument "a" must be int; got str instead')
def test_tuple_bad_type(self):
def foo(a: Tuple[int]):
assert check_argument_types()
exc = pytest.raises(TypeError, foo, 5)
assert str(exc.value) == (
'type of argument "a" must be a tuple; got int instead')
def test_tuple_too_many_elements(self):
def foo(a: Tuple[int, str]):
assert check_argument_types()
exc = pytest.raises(TypeError, foo, (1, 'aa', 2))
assert str(exc.value) == ('argument "a" has wrong number of elements (expected 2, got 3 '
'instead)')
def test_tuple_too_few_elements(self):
def foo(a: Tuple[int, str]):
assert check_argument_types()
exc = pytest.raises(TypeError, foo, (1,))
assert str(exc.value) == ('argument "a" has wrong number of elements (expected 2, got 1 '
'instead)')
def test_tuple_bad_element(self):
def foo(a: Tuple[int, str]):
assert check_argument_types()
exc = pytest.raises(TypeError, foo, (1, 2))
assert str(exc.value) == (
'type of argument "a"[1] must be str; got int instead')
def test_tuple_ellipsis_bad_element(self):
def foo(a: Tuple[int, ...]):
assert check_argument_types()
exc = pytest.raises(TypeError, foo, (1, 2, 'blah'))
assert str(exc.value) == (
'type of argument "a"[2] must be int; got str instead')
def test_namedtuple(self):
Employee = NamedTuple('Employee', [('name', str), ('id', int)])
def foo(bar: Employee):
assert check_argument_types()
foo(Employee('bob', 1))
def test_namedtuple_type_mismatch(self):
Employee = NamedTuple('Employee', [('name', str), ('id', int)])
def foo(bar: Employee):
assert check_argument_types()
pytest.raises(TypeError, foo, ('bob', 1)).\
match('type of argument "bar" must be a named tuple of type '
r'(test_typeguard\.)?Employee; got tuple instead')
def test_namedtuple_wrong_field_type(self):
Employee = NamedTuple('Employee', [('name', str), ('id', int)])
def foo(bar: Employee):
assert check_argument_types()
pytest.raises(TypeError, foo, Employee(2, 1)).\
match('type of argument "bar".name must be str; got int instead')
@pytest.mark.parametrize('value', [6, 'aa'])
def test_union(self, value):
def foo(a: Union[str, int]):
assert check_argument_types()
foo(value)
def test_union_typing_type(self):
def foo(a: Union[str, Collection]):
assert check_argument_types()
with pytest.raises(TypeError):
foo(1)
@pytest.mark.parametrize('value', [6.5, b'aa'])
def test_union_fail(self, value):
def foo(a: Union[str, int]):
assert check_argument_types()
exc = pytest.raises(TypeError, foo, value)
assert str(exc.value) == (
'type of argument "a" must be one of (str, int); got {} instead'.
format(value.__class__.__name__))
@pytest.mark.parametrize('values', [
(6, 7),
('aa', 'bb')
], ids=['int', 'str'])
def test_typevar_constraints(self, values):
T = TypeVar('T', int, str)
def foo(a: T, b: T):
assert check_argument_types()
foo(*values)
def test_typevar_constraints_fail_typing_type(self):
T = TypeVar('T', int, Collection)
def foo(a: T, b: T):
assert check_argument_types()
with pytest.raises(TypeError):
foo('aa', 'bb')
def test_typevar_constraints_fail(self):
T = TypeVar('T', int, str)
def foo(a: T, b: T):
assert check_argument_types()
exc = pytest.raises(TypeError, foo, 2.5, 'aa')
assert str(exc.value) == ('type of argument "a" must be one of (int, str); got float '
'instead')
def test_typevar_bound(self):
T = TypeVar('T', bound=Parent)
def foo(a: T, b: T):
assert check_argument_types()
foo(Child(), Child())
def test_typevar_bound_fail(self):
T = TypeVar('T', bound=Child)
def foo(a: T, b: T):
assert check_argument_types()
exc = pytest.raises(TypeError, foo, Parent(), Parent())
assert str(exc.value) == ('type of argument "a" must be test_typeguard.Child or one of '
'its subclasses; got test_typeguard.Parent instead')
def test_typevar_invariant_fail(self):
T = TypeVar('T', int, str)
def foo(a: T, b: T):
assert check_argument_types()
exc = pytest.raises(TypeError, foo, 2, 3.6)
assert str(exc.value) == 'type of argument "b" must be exactly int; got float instead'
def test_typevar_covariant(self):
T = TypeVar('T', covariant=True)
def foo(a: T, b: T):
assert check_argument_types()
foo(Parent(), Child())
def test_typevar_covariant_fail(self):
T = TypeVar('T', covariant=True)
def foo(a: T, b: T):
assert check_argument_types()
exc = pytest.raises(TypeError, foo, Child(), Parent())
assert str(exc.value) == ('type of argument "b" must be test_typeguard.Child or one of '
'its subclasses; got test_typeguard.Parent instead')
def test_typevar_contravariant(self):
T = TypeVar('T', contravariant=True)
def foo(a: T, b: T):
assert check_argument_types()
foo(Child(), Parent())
def test_typevar_contravariant_fail(self):
T = TypeVar('T', contravariant=True)
def foo(a: T, b: T):
assert check_argument_types()
exc = pytest.raises(TypeError, foo, Parent(), Child())
assert str(exc.value) == ('type of argument "b" must be test_typeguard.Parent or one of '
'its superclasses; got test_typeguard.Child instead')
@pytest.mark.skipif(Type is List, reason='typing.Type could not be imported')
def test_class_bad_subclass(self):
def foo(a: Type[Child]):
assert check_argument_types()
pytest.raises(TypeError, foo, Parent).match(
'"a" must be a subclass of test_typeguard.Child; got test_typeguard.Parent instead')
def test_class_any(self):
def foo(a: Type[Any]):
assert check_argument_types()
foo(str)
def test_wrapped_function(self):
def decorator(func):
@wraps(func)
def wrapper(*args, **kwargs):
return func(*args, **kwargs)
return wrapper
@decorator
def foo(a: 'Child'):
assert check_argument_types()
exc = pytest.raises(TypeError, foo, Parent())
assert str(exc.value) == ('type of argument "a" must be test_typeguard.Child; '
'got test_typeguard.Parent instead')
def test_mismatching_default_type(self):
def foo(a: str = 1):
assert check_argument_types()
pytest.raises(TypeError, foo).match('type of argument "a" must be str; got int instead')
def test_implicit_default_none(self):
"""
Test that if the default value is ``None``, a ``None`` argument can be passed.
"""
def foo(a: str = None):
assert check_argument_types()
foo()
def test_generator(self):
"""Test that argument type checking works in a generator function too."""
def generate(a: int):
assert check_argument_types()
yield a
yield a + 1
gen = generate(1)
next(gen)
def test_wrapped_generator_no_return_type_annotation(self):
"""Test that return type checking works in a generator function too."""
@typechecked
def generate(a: int):
yield a
yield a + 1
gen = generate(1)
next(gen)
def test_varargs(self):
def foo(*args: int):
assert check_argument_types()
foo(1, 2)
def test_varargs_fail(self):
def foo(*args: int):
assert check_argument_types()
exc = pytest.raises(TypeError, foo, 1, 'a')
exc.match(r'type of argument "args"\[1\] must be int; got str instead')
def test_kwargs(self):
def foo(**kwargs: int):
assert check_argument_types()
foo(a=1, b=2)
def test_kwargs_fail(self):
def foo(**kwargs: int):
assert check_argument_types()
exc = pytest.raises(TypeError, foo, a=1, b='a')
exc.match(r'type of argument "kwargs"\[\'b\'\] must be int; got str instead')
def test_generic(self):
T_Foo = TypeVar('T_Foo')
class FooGeneric(Generic[T_Foo]):
pass
def foo(a: FooGeneric[str]):
assert check_argument_types()
foo(FooGeneric[str]())
def test_newtype(self):
try:
from typing import NewType
except ImportError:
pytest.skip('Skipping newtype test since no NewType in current typing library')
myint = NewType("myint", int)
def foo(a: myint) -> int:
assert check_argument_types()
return 42
assert foo(1) == 42
exc = pytest.raises(TypeError, foo, "a")
assert str(exc.value) == 'type of argument "a" must be int; got str instead'
@pytest.mark.skipif(Collection is None, reason='typing.Collection is not available')
def test_collection(self):
def foo(a: Collection):
assert check_argument_types()
pytest.raises(TypeError, foo, True).match(
'type of argument "a" must be collections.abc.Collection; got bool instead')
def test_binary_io(self):
def foo(a: BinaryIO):
assert check_argument_types()
foo(BytesIO())
def test_text_io(self):
def foo(a: TextIO):
assert check_argument_types()
foo(StringIO())
def test_binary_io_fail(self):
def foo(a: TextIO):
assert check_argument_types()
pytest.raises(TypeError, foo, BytesIO()).match('must be a text based I/O')
def test_text_io_fail(self):
def foo(a: BinaryIO):
assert check_argument_types()
pytest.raises(TypeError, foo, StringIO()).match('must be a binary I/O')
def test_binary_io_real_file(self, tmpdir):
def foo(a: BinaryIO):
assert check_argument_types()
with tmpdir.join('testfile').open('wb') as f:
foo(f)
def test_text_io_real_file(self, tmpdir):
def foo(a: TextIO):
assert check_argument_types()
with tmpdir.join('testfile').open('w') as f:
foo(f)
def test_recursive_type(self):
def foo(arg: JSONType) -> None:
assert check_argument_types()
foo({'a': [1, 2, 3]})
pytest.raises(TypeError, foo, {'a': (1, 2, 3)}).\
match(r'type of argument "arg" must be one of \(str, int, float, (bool, )?NoneType, '
r'List, Dict\); got dict instead')
class TestTypeChecked:
def test_typechecked(self):
@typechecked
def foo(a: int, b: str) -> str:
return 'abc'
assert foo(4, 'abc') == 'abc'
def test_typechecked_always(self):
@typechecked(always=True)
def foo(a: int, b: str) -> str:
return 'abc'
assert foo(4, 'abc') == 'abc'
def test_typechecked_arguments_fail(self):
@typechecked
def foo(a: int, b: str) -> str:
return 'abc'
exc = pytest.raises(TypeError, foo, 4, 5)
assert str(exc.value) == 'type of argument "b" must be str; got int instead'
def test_typechecked_return_type_fail(self):
@typechecked
def foo(a: int, b: str) -> str:
return 6
exc = pytest.raises(TypeError, foo, 4, 'abc')
assert str(exc.value) == 'type of the return value must be str; got int instead'
def test_typechecked_return_typevar_fail(self):
T = TypeVar('T', int, float)
@typechecked
def foo(a: T, b: T) -> T:
return 'a'
exc = pytest.raises(TypeError, foo, 4, 2)
assert str(exc.value) == 'type of the return value must be exactly int; got str instead'
def test_typechecked_no_annotations(self, recwarn):
def foo(a, b):
pass
typechecked(foo)
func_name = function_name(foo)
assert len(recwarn) == 1
assert str(recwarn[0].message) == (
'no type annotations present -- not typechecking {}'.format(func_name))
def test_return_type_none(self):
"""Check that a declared return type of None is respected."""
@typechecked
def foo() -> None:
return 'a'
exc = pytest.raises(TypeError, foo)
assert str(exc.value) == 'type of the return value must be NoneType; got str instead'
def test_return_type_magicmock(self, mock_class):
@typechecked
def foo() -> str:
return mock_class()
foo()
@pytest.mark.parametrize('typehint', [
Callable[..., int],
Callable
], ids=['parametrized', 'unparametrized'])
def test_callable(self, typehint):
@typechecked
def foo(a: typehint):
pass
def some_callable() -> int:
pass
foo(some_callable)
@pytest.mark.parametrize('typehint', [
List[int],
List,
list,
], ids=['parametrized', 'unparametrized', 'plain'])
def test_list(self, typehint):
@typechecked
def foo(a: typehint):
pass
foo([1, 2])
@pytest.mark.parametrize('typehint', [
Dict[str, int],
Dict,
dict
], ids=['parametrized', 'unparametrized', 'plain'])
def test_dict(self, typehint):
@typechecked
def foo(a: typehint):
pass
foo({'x': 2})
@pytest.mark.parametrize('typehint, value', [
(Dict, {'x': 2, 6: 4}),
(List, ['x', 6]),
(Sequence, ['x', 6]),
(Set, {'x', 6}),
(AbstractSet, {'x', 6}),
(Tuple, ('x', 6)),
], ids=['dict', 'list', 'sequence', 'set', 'abstractset', 'tuple'])
def test_unparametrized_types_mixed_values(self, typehint, value):
@typechecked
def foo(a: typehint):
pass
foo(value)
@pytest.mark.parametrize('typehint', [
Sequence[str],
Sequence
], ids=['parametrized', 'unparametrized'])
@pytest.mark.parametrize('value', [('a', 'b'), ['a', 'b'], 'abc'],
ids=['tuple', 'list', 'str'])
def test_sequence(self, typehint, value):
@typechecked
def foo(a: typehint):
pass
foo(value)
@pytest.mark.parametrize('typehint', [
Iterable[str],
Iterable
], ids=['parametrized', 'unparametrized'])
@pytest.mark.parametrize('value', [('a', 'b'), ['a', 'b'], 'abc'],
ids=['tuple', 'list', 'str'])
def test_iterable(self, typehint, value):
@typechecked
def foo(a: typehint):
pass
foo(value)
@pytest.mark.parametrize('typehint', [
Container[str],
Container
], ids=['parametrized', 'unparametrized'])
@pytest.mark.parametrize('value', [('a', 'b'), ['a', 'b'], 'abc'],
ids=['tuple', 'list', 'str'])
def test_container(self, typehint, value):
@typechecked
def foo(a: typehint):
pass
foo(value)
@pytest.mark.parametrize('typehint', [
AbstractSet[int],
AbstractSet,
Set[int],
Set,
set
], ids=['abstract_parametrized', 'abstract', 'parametrized', 'unparametrized', 'plain'])
@pytest.mark.parametrize('value', [set(), {6}])
def test_set(self, typehint, value):
@typechecked
def foo(a: typehint):
pass
foo(value)
@pytest.mark.parametrize('typehint', [
Tuple[int, int],
Tuple[int, ...],
Tuple,
tuple
], ids=['parametrized', 'ellipsis', 'unparametrized', 'plain'])
def test_tuple(self, typehint):
@typechecked
def foo(a: typehint):
pass
foo((1, 2))
def test_empty_tuple(self):
@typechecked
def foo(a: Tuple[()]):
pass
foo(())
@pytest.mark.skipif(Type is List, reason='typing.Type could not be imported')
@pytest.mark.parametrize('typehint', [
Type[Parent],
Type[TypeVar('UnboundType')], # noqa: F821
Type[TypeVar('BoundType', bound=Parent)], # noqa: F821
Type,
type
], ids=['parametrized', 'unbound-typevar', 'bound-typevar', 'unparametrized', 'plain'])
def test_class(self, typehint):
@typechecked
def foo(a: typehint):
pass
foo(Child)
@pytest.mark.skipif(Type is List, reason='typing.Type could not be imported')
def test_class_not_a_class(self):
@typechecked
def foo(a: Type[dict]):
pass
exc = pytest.raises(TypeError, foo, 1)
exc.match('type of argument "a" must be a type; got int instead')
@pytest.mark.parametrize('typehint, value', [
(complex, complex(1, 5)),
(complex, 1.0),
(complex, 1),
(float, 1.0),
(float, 1)
], ids=['complex-complex', 'complex-float', 'complex-int', 'float-float', 'float-int'])
def test_numbers(self, typehint, value):
@typechecked
def foo(a: typehint):
pass
foo(value)
def test_coroutine_correct_return_type(self):
@typechecked
async def foo() -> str:
return 'foo'
coro = foo()
pytest.raises(StopIteration, coro.send, None)
def test_coroutine_wrong_return_type(self):
@typechecked
async def foo() -> str:
return 1
coro = foo()
pytest.raises(TypeError, coro.send, None).\
match('type of the return value must be str; got int instead')
def test_bytearray_bytes(self):
"""Test that a bytearray is accepted where bytes are expected."""
@typechecked
def foo(x: bytes) -> None:
pass
foo(bytearray([1]))
def test_class_decorator(self):
@typechecked
class Foo:
@staticmethod
def staticmethod() -> int:
return 'foo'
@classmethod
def classmethod(cls) -> int:
return 'foo'
def method(self) -> int:
return 'foo'
pattern = 'type of the return value must be int; got str instead'
pytest.raises(TypeError, Foo.staticmethod).match(pattern)
pytest.raises(TypeError, Foo.classmethod).match(pattern)
pytest.raises(TypeError, Foo().method).match(pattern)
@pytest.mark.parametrize('annotation', [
Generator[int, str, List[str]],
Generator,