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from IPython.utils.dir2 import dir2
import pytest
class Base(object):
x = 1
z = 23
def test_base():
res = dir2(Base())
assert "x" in res
assert "z" in res
assert "y" not in res
assert "__class__" in res
assert res.count("x") == 1
assert res.count("__class__") == 1
def test_SubClass():
class SubClass(Base):
y = 2
res = dir2(SubClass())
assert "y" in res
assert res.count("y") == 1
assert res.count("x") == 1
def test_SubClass_with_trait_names_attr():
# usecase: trait_names is used in a class describing psychological classification
class SubClass(Base):
y = 2
trait_names = 44
res = dir2(SubClass())
assert "trait_names" in res
def test_misbehaving_object_without_trait_names():
# dir2 shouldn't raise even when objects are dumb and raise
# something other than AttribteErrors on bad getattr.
class MisbehavingGetattr:
def __getattr__(self, attr):
raise KeyError("I should be caught")
def some_method(self):
return True
class SillierWithDir(MisbehavingGetattr):
def __dir__(self):
return ["some_method"]
for bad_klass in (MisbehavingGetattr, SillierWithDir):
obj = bad_klass()
assert obj.some_method()
with pytest.raises(KeyError):
obj.other_method()
res = dir2(obj)
assert "some_method" in res
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