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"""Check invalid value returned by __str__ """
# pylint: disable=too-few-public-methods,missing-docstring,import-error,useless-object-inheritance,unnecessary-lambda-assignment
import six
from missing import Missing
class FirstGoodStr(object):
"""__str__ returns <type 'str'>"""
def __str__(self):
return "some str"
class SecondGoodStr(object):
"""__str__ returns <type 'str'>"""
def __str__(self):
return str(123)
class StrMetaclass(type):
def __str__(cls):
return "some str"
@six.add_metaclass(StrMetaclass)
class ThirdGoodStr(object):
"""Str through the metaclass."""
class FirstBadStr(object):
""" __str__ returns bytes """
def __str__(self): # [invalid-str-returned]
return b"123"
class SecondBadStr(object):
""" __str__ returns int """
def __str__(self): # [invalid-str-returned]
return 1
class ThirdBadStr(object):
""" __str__ returns node which does not have 'value' in AST """
def __str__(self): # [invalid-str-returned]
return lambda: "some str"
class AmbiguousStr(object):
""" Uninferable return value """
__str__ = lambda self: Missing
class AnotherAmbiguousStr(object):
"""Potential uninferable return value"""
def __str__(self):
return str(Missing)
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