def test_from_class():
class Dummy(object):
"""DocString"""
def __init__(self):
self.frame = list('abcdefghij')
def __len__(self):
return len(self.frame)
def __getitem__(self, i):
"""Other Docstring"""
return self.frame[i] # actual code of get_frame
def __repr__(self):
return 'Repr'
DummySli = Slicerator.from_class(Dummy)
assert Dummy()[:2] == ['a', 'b'] # Dummy is unaffected
# class slots propagate
assert DummySli.__name__ == Dummy.__name__
assert DummySli.__doc__ == Dummy.__doc__
assert DummySli.__module__ == Dummy.__module__
dummy = DummySli()
assert isinstance(dummy, Dummy) # still instance of Dummy
assert repr(dummy) == 'Repr' # repr propagates
compare_slice_to_list(dummy, 'abcdefghij')
compare_slice_to_list(dummy[1:], 'bcdefghij')
compare_slice_to_list(dummy[1:][2:], 'defghij')
capitalize = pipeline(_capitalize_if_equal)
cap_b = capitalize(dummy, 'b')
assert_letters_equal(cap_b, 'aBcdefghij')
def test_from_class():
class Dummy(object):
"""DocString"""
def __init__(self):
self.frame = list('abcdefghij')
def __len__(self):
return len(self.frame)
def __getitem__(self, i):
"""Other Docstring"""
return self.frame[i] # actual code of get_frame
def __repr__(self):
return 'Repr'
DummySli = Slicerator.from_class(Dummy)
assert Dummy()[:2] == ['a', 'b'] # Dummy is unaffected
# class slots propagate
assert DummySli.__name__ == Dummy.__name__
assert DummySli.__doc__ == Dummy.__doc__
assert DummySli.__module__ == Dummy.__module__
dummy = DummySli()
assert isinstance(dummy, Dummy) # still instance of Dummy
assert repr(dummy) == 'Repr' # repr propagates
compare_slice_to_list(dummy, 'abcdefghij')
compare_slice_to_list(dummy[1:], 'bcdefghij')
compare_slice_to_list(dummy[1:][2:], 'defghij')
capitalize = pipeline(_capitalize_if_equal)
cap_b = capitalize(dummy, 'b')
assert_letters_equal(cap_b, 'aBcdefghij')
def test_lazy_hasattr():
# this ensures that the Slicerator init does not evaluate all properties
class Dummy(object):
"""DocString"""
def __init__(self):
self.frame = list('abcdefghij')
def __len__(self):
return len(self.frame)
def __getitem__(self, i):
"""Other Docstring"""
return self.frame[i] # actual code of get_frame
@property
def forbidden_property(self):
raise RuntimeError()
DummySli = Slicerator.from_class(Dummy)
def test_lazy_hasattr():
# this ensures that the Slicerator init does not evaluate all properties
class Dummy(object):
"""DocString"""
def __init__(self):
self.frame = list('abcdefghij')
def __len__(self):
return len(self.frame)
def __getitem__(self, i):
"""Other Docstring"""
return self.frame[i] # actual code of get_frame
@property
def forbidden_property(self):
raise RuntimeError()
DummySli = Slicerator.from_class(Dummy)
