509 lines
15 KiB
Python
509 lines
15 KiB
Python
"""
|
|
Tests for methods from `attrib._cmp`.
|
|
"""
|
|
|
|
from __future__ import absolute_import, division, print_function
|
|
|
|
import pytest
|
|
|
|
from attr._cmp import cmp_using
|
|
from attr._compat import PY2
|
|
|
|
|
|
# Test parameters.
|
|
EqCSameType = cmp_using(eq=lambda a, b: a == b, class_name="EqCSameType")
|
|
PartialOrderCSameType = cmp_using(
|
|
eq=lambda a, b: a == b,
|
|
lt=lambda a, b: a < b,
|
|
class_name="PartialOrderCSameType",
|
|
)
|
|
FullOrderCSameType = cmp_using(
|
|
eq=lambda a, b: a == b,
|
|
lt=lambda a, b: a < b,
|
|
le=lambda a, b: a <= b,
|
|
gt=lambda a, b: a > b,
|
|
ge=lambda a, b: a >= b,
|
|
class_name="FullOrderCSameType",
|
|
)
|
|
|
|
EqCAnyType = cmp_using(
|
|
eq=lambda a, b: a == b, require_same_type=False, class_name="EqCAnyType"
|
|
)
|
|
PartialOrderCAnyType = cmp_using(
|
|
eq=lambda a, b: a == b,
|
|
lt=lambda a, b: a < b,
|
|
require_same_type=False,
|
|
class_name="PartialOrderCAnyType",
|
|
)
|
|
|
|
|
|
eq_data = [
|
|
(EqCSameType, True),
|
|
(EqCAnyType, False),
|
|
]
|
|
|
|
order_data = [
|
|
(PartialOrderCSameType, True),
|
|
(PartialOrderCAnyType, False),
|
|
(FullOrderCSameType, True),
|
|
]
|
|
|
|
eq_ids = [c[0].__name__ for c in eq_data]
|
|
order_ids = [c[0].__name__ for c in order_data]
|
|
|
|
cmp_data = eq_data + order_data
|
|
cmp_ids = eq_ids + order_ids
|
|
|
|
|
|
class TestEqOrder(object):
|
|
"""
|
|
Tests for eq and order related methods.
|
|
"""
|
|
|
|
#########
|
|
# eq
|
|
#########
|
|
@pytest.mark.parametrize("cls, requires_same_type", cmp_data, ids=cmp_ids)
|
|
def test_equal_same_type(self, cls, requires_same_type):
|
|
"""
|
|
Equal objects are detected as equal.
|
|
"""
|
|
assert cls(1) == cls(1)
|
|
assert not (cls(1) != cls(1))
|
|
|
|
@pytest.mark.parametrize("cls, requires_same_type", cmp_data, ids=cmp_ids)
|
|
def test_unequal_same_type(self, cls, requires_same_type):
|
|
"""
|
|
Unequal objects of correct type are detected as unequal.
|
|
"""
|
|
assert cls(1) != cls(2)
|
|
assert not (cls(1) == cls(2))
|
|
|
|
@pytest.mark.parametrize("cls, requires_same_type", cmp_data, ids=cmp_ids)
|
|
def test_equal_different_type(self, cls, requires_same_type):
|
|
"""
|
|
Equal values of different types are detected appropriately.
|
|
"""
|
|
assert (cls(1) == cls(1.0)) == (not requires_same_type)
|
|
assert not (cls(1) != cls(1.0)) == (not requires_same_type)
|
|
|
|
#########
|
|
# lt
|
|
#########
|
|
@pytest.mark.skipif(PY2, reason="PY2 does not raise TypeError")
|
|
@pytest.mark.parametrize("cls, requires_same_type", eq_data, ids=eq_ids)
|
|
def test_lt_unorderable(self, cls, requires_same_type):
|
|
"""
|
|
TypeError is raised if class does not implement __lt__.
|
|
"""
|
|
with pytest.raises(TypeError):
|
|
cls(1) < cls(2)
|
|
|
|
@pytest.mark.parametrize(
|
|
"cls, requires_same_type", order_data, ids=order_ids
|
|
)
|
|
def test_lt_same_type(self, cls, requires_same_type):
|
|
"""
|
|
Less-than objects are detected appropriately.
|
|
"""
|
|
assert cls(1) < cls(2)
|
|
assert not (cls(2) < cls(1))
|
|
|
|
@pytest.mark.parametrize(
|
|
"cls, requires_same_type", order_data, ids=order_ids
|
|
)
|
|
def test_not_lt_same_type(self, cls, requires_same_type):
|
|
"""
|
|
Not less-than objects are detected appropriately.
|
|
"""
|
|
assert cls(2) >= cls(1)
|
|
assert not (cls(1) >= cls(2))
|
|
|
|
@pytest.mark.parametrize(
|
|
"cls, requires_same_type", order_data, ids=order_ids
|
|
)
|
|
def test_lt_different_type(self, cls, requires_same_type):
|
|
"""
|
|
Less-than values of different types are detected appropriately.
|
|
"""
|
|
if requires_same_type:
|
|
# Unlike __eq__, NotImplemented will cause an exception to be
|
|
# raised from __lt__.
|
|
if not PY2:
|
|
with pytest.raises(TypeError):
|
|
cls(1) < cls(2.0)
|
|
else:
|
|
assert cls(1) < cls(2.0)
|
|
assert not (cls(2) < cls(1.0))
|
|
|
|
#########
|
|
# le
|
|
#########
|
|
@pytest.mark.skipif(PY2, reason="PY2 does not raise TypeError")
|
|
@pytest.mark.parametrize("cls, requires_same_type", eq_data, ids=eq_ids)
|
|
def test_le_unorderable(self, cls, requires_same_type):
|
|
"""
|
|
TypeError is raised if class does not implement __le__.
|
|
"""
|
|
with pytest.raises(TypeError):
|
|
cls(1) <= cls(2)
|
|
|
|
@pytest.mark.parametrize(
|
|
"cls, requires_same_type", order_data, ids=order_ids
|
|
)
|
|
def test_le_same_type(self, cls, requires_same_type):
|
|
"""
|
|
Less-than-or-equal objects are detected appropriately.
|
|
"""
|
|
assert cls(1) <= cls(1)
|
|
assert cls(1) <= cls(2)
|
|
assert not (cls(2) <= cls(1))
|
|
|
|
@pytest.mark.parametrize(
|
|
"cls, requires_same_type", order_data, ids=order_ids
|
|
)
|
|
def test_not_le_same_type(self, cls, requires_same_type):
|
|
"""
|
|
Not less-than-or-equal objects are detected appropriately.
|
|
"""
|
|
assert cls(2) > cls(1)
|
|
assert not (cls(1) > cls(1))
|
|
assert not (cls(1) > cls(2))
|
|
|
|
@pytest.mark.parametrize(
|
|
"cls, requires_same_type", order_data, ids=order_ids
|
|
)
|
|
def test_le_different_type(self, cls, requires_same_type):
|
|
"""
|
|
Less-than-or-equal values of diff. types are detected appropriately.
|
|
"""
|
|
if requires_same_type:
|
|
# Unlike __eq__, NotImplemented will cause an exception to be
|
|
# raised from __le__.
|
|
if not PY2:
|
|
with pytest.raises(TypeError):
|
|
cls(1) <= cls(2.0)
|
|
else:
|
|
assert cls(1) <= cls(2.0)
|
|
assert cls(1) <= cls(1.0)
|
|
assert not (cls(2) <= cls(1.0))
|
|
|
|
#########
|
|
# gt
|
|
#########
|
|
@pytest.mark.skipif(PY2, reason="PY2 does not raise TypeError")
|
|
@pytest.mark.parametrize("cls, requires_same_type", eq_data, ids=eq_ids)
|
|
def test_gt_unorderable(self, cls, requires_same_type):
|
|
"""
|
|
TypeError is raised if class does not implement __gt__.
|
|
"""
|
|
with pytest.raises(TypeError):
|
|
cls(2) > cls(1)
|
|
|
|
@pytest.mark.parametrize(
|
|
"cls, requires_same_type", order_data, ids=order_ids
|
|
)
|
|
def test_gt_same_type(self, cls, requires_same_type):
|
|
"""
|
|
Greater-than objects are detected appropriately.
|
|
"""
|
|
assert cls(2) > cls(1)
|
|
assert not (cls(1) > cls(2))
|
|
|
|
@pytest.mark.parametrize(
|
|
"cls, requires_same_type", order_data, ids=order_ids
|
|
)
|
|
def test_not_gt_same_type(self, cls, requires_same_type):
|
|
"""
|
|
Not greater-than objects are detected appropriately.
|
|
"""
|
|
assert cls(1) <= cls(2)
|
|
assert not (cls(2) <= cls(1))
|
|
|
|
@pytest.mark.parametrize(
|
|
"cls, requires_same_type", order_data, ids=order_ids
|
|
)
|
|
def test_gt_different_type(self, cls, requires_same_type):
|
|
"""
|
|
Greater-than values of different types are detected appropriately.
|
|
"""
|
|
if requires_same_type:
|
|
# Unlike __eq__, NotImplemented will cause an exception to be
|
|
# raised from __gt__.
|
|
if not PY2:
|
|
with pytest.raises(TypeError):
|
|
cls(2) > cls(1.0)
|
|
else:
|
|
assert cls(2) > cls(1.0)
|
|
assert not (cls(1) > cls(2.0))
|
|
|
|
#########
|
|
# ge
|
|
#########
|
|
@pytest.mark.skipif(PY2, reason="PY2 does not raise TypeError")
|
|
@pytest.mark.parametrize("cls, requires_same_type", eq_data, ids=eq_ids)
|
|
def test_ge_unorderable(self, cls, requires_same_type):
|
|
"""
|
|
TypeError is raised if class does not implement __ge__.
|
|
"""
|
|
with pytest.raises(TypeError):
|
|
cls(2) >= cls(1)
|
|
|
|
@pytest.mark.parametrize(
|
|
"cls, requires_same_type", order_data, ids=order_ids
|
|
)
|
|
def test_ge_same_type(self, cls, requires_same_type):
|
|
"""
|
|
Greater-than-or-equal objects are detected appropriately.
|
|
"""
|
|
assert cls(1) >= cls(1)
|
|
assert cls(2) >= cls(1)
|
|
assert not (cls(1) >= cls(2))
|
|
|
|
@pytest.mark.parametrize(
|
|
"cls, requires_same_type", order_data, ids=order_ids
|
|
)
|
|
def test_not_ge_same_type(self, cls, requires_same_type):
|
|
"""
|
|
Not greater-than-or-equal objects are detected appropriately.
|
|
"""
|
|
assert cls(1) < cls(2)
|
|
assert not (cls(1) < cls(1))
|
|
assert not (cls(2) < cls(1))
|
|
|
|
@pytest.mark.parametrize(
|
|
"cls, requires_same_type", order_data, ids=order_ids
|
|
)
|
|
def test_ge_different_type(self, cls, requires_same_type):
|
|
"""
|
|
Greater-than-or-equal values of diff. types are detected appropriately.
|
|
"""
|
|
if requires_same_type:
|
|
# Unlike __eq__, NotImplemented will cause an exception to be
|
|
# raised from __ge__.
|
|
if not PY2:
|
|
with pytest.raises(TypeError):
|
|
cls(2) >= cls(1.0)
|
|
else:
|
|
assert cls(2) >= cls(2.0)
|
|
assert cls(2) >= cls(1.0)
|
|
assert not (cls(1) >= cls(2.0))
|
|
|
|
|
|
class TestDundersUnnamedClass(object):
|
|
"""
|
|
Tests for dunder attributes of unnamed classes.
|
|
"""
|
|
|
|
cls = cmp_using(eq=lambda a, b: a == b)
|
|
|
|
def test_class(self):
|
|
"""
|
|
Class name and qualified name should be well behaved.
|
|
"""
|
|
assert self.cls.__name__ == "Comparable"
|
|
if not PY2:
|
|
assert self.cls.__qualname__ == "Comparable"
|
|
|
|
def test_eq(self):
|
|
"""
|
|
__eq__ docstring and qualified name should be well behaved.
|
|
"""
|
|
method = self.cls.__eq__
|
|
assert method.__doc__.strip() == "Return a == b. Computed by attrs."
|
|
assert method.__name__ == "__eq__"
|
|
|
|
def test_ne(self):
|
|
"""
|
|
__ne__ docstring and qualified name should be well behaved.
|
|
"""
|
|
method = self.cls.__ne__
|
|
assert method.__doc__.strip() == (
|
|
"Check equality and either forward a NotImplemented or\n"
|
|
" return the result negated."
|
|
)
|
|
assert method.__name__ == "__ne__"
|
|
|
|
|
|
class TestTotalOrderingException(object):
|
|
"""
|
|
Test for exceptions related to total ordering.
|
|
"""
|
|
|
|
def test_eq_must_specified(self):
|
|
"""
|
|
`total_ordering` requires `__eq__` to be specified.
|
|
"""
|
|
with pytest.raises(ValueError) as ei:
|
|
cmp_using(lt=lambda a, b: a < b)
|
|
|
|
assert ei.value.args[0] == (
|
|
"eq must be define is order to complete ordering from "
|
|
"lt, le, gt, ge."
|
|
)
|
|
|
|
|
|
class TestNotImplementedIsPropagated(object):
|
|
"""
|
|
Test related to functions that return NotImplemented.
|
|
"""
|
|
|
|
def test_not_implemented_is_propagated(self):
|
|
"""
|
|
If the comparison function returns NotImplemented,
|
|
the dunder method should too.
|
|
"""
|
|
C = cmp_using(eq=lambda a, b: NotImplemented if a == 1 else a == b)
|
|
|
|
assert C(2) == C(2)
|
|
assert C(1) != C(1)
|
|
|
|
|
|
class TestDundersPartialOrdering(object):
|
|
"""
|
|
Tests for dunder attributes of classes with partial ordering.
|
|
"""
|
|
|
|
cls = PartialOrderCSameType
|
|
|
|
def test_class(self):
|
|
"""
|
|
Class name and qualified name should be well behaved.
|
|
"""
|
|
assert self.cls.__name__ == "PartialOrderCSameType"
|
|
if not PY2:
|
|
assert self.cls.__qualname__ == "PartialOrderCSameType"
|
|
|
|
def test_eq(self):
|
|
"""
|
|
__eq__ docstring and qualified name should be well behaved.
|
|
"""
|
|
method = self.cls.__eq__
|
|
assert method.__doc__.strip() == "Return a == b. Computed by attrs."
|
|
assert method.__name__ == "__eq__"
|
|
|
|
def test_ne(self):
|
|
"""
|
|
__ne__ docstring and qualified name should be well behaved.
|
|
"""
|
|
method = self.cls.__ne__
|
|
assert method.__doc__.strip() == (
|
|
"Check equality and either forward a NotImplemented or\n"
|
|
" return the result negated."
|
|
)
|
|
assert method.__name__ == "__ne__"
|
|
|
|
def test_lt(self):
|
|
"""
|
|
__lt__ docstring and qualified name should be well behaved.
|
|
"""
|
|
method = self.cls.__lt__
|
|
assert method.__doc__.strip() == "Return a < b. Computed by attrs."
|
|
assert method.__name__ == "__lt__"
|
|
|
|
def test_le(self):
|
|
"""
|
|
__le__ docstring and qualified name should be well behaved.
|
|
"""
|
|
method = self.cls.__le__
|
|
if PY2:
|
|
assert method.__doc__ == "x.__le__(y) <==> x<=y"
|
|
else:
|
|
assert method.__doc__.strip().startswith(
|
|
"Return a <= b. Computed by @total_ordering from"
|
|
)
|
|
assert method.__name__ == "__le__"
|
|
|
|
def test_gt(self):
|
|
"""
|
|
__gt__ docstring and qualified name should be well behaved.
|
|
"""
|
|
method = self.cls.__gt__
|
|
if PY2:
|
|
assert method.__doc__ == "x.__gt__(y) <==> x>y"
|
|
else:
|
|
assert method.__doc__.strip().startswith(
|
|
"Return a > b. Computed by @total_ordering from"
|
|
)
|
|
assert method.__name__ == "__gt__"
|
|
|
|
def test_ge(self):
|
|
"""
|
|
__ge__ docstring and qualified name should be well behaved.
|
|
"""
|
|
method = self.cls.__ge__
|
|
if PY2:
|
|
assert method.__doc__ == "x.__ge__(y) <==> x>=y"
|
|
else:
|
|
assert method.__doc__.strip().startswith(
|
|
"Return a >= b. Computed by @total_ordering from"
|
|
)
|
|
assert method.__name__ == "__ge__"
|
|
|
|
|
|
class TestDundersFullOrdering(object):
|
|
"""
|
|
Tests for dunder attributes of classes with full ordering.
|
|
"""
|
|
|
|
cls = FullOrderCSameType
|
|
|
|
def test_class(self):
|
|
"""
|
|
Class name and qualified name should be well behaved.
|
|
"""
|
|
assert self.cls.__name__ == "FullOrderCSameType"
|
|
if not PY2:
|
|
assert self.cls.__qualname__ == "FullOrderCSameType"
|
|
|
|
def test_eq(self):
|
|
"""
|
|
__eq__ docstring and qualified name should be well behaved.
|
|
"""
|
|
method = self.cls.__eq__
|
|
assert method.__doc__.strip() == "Return a == b. Computed by attrs."
|
|
assert method.__name__ == "__eq__"
|
|
|
|
def test_ne(self):
|
|
"""
|
|
__ne__ docstring and qualified name should be well behaved.
|
|
"""
|
|
method = self.cls.__ne__
|
|
assert method.__doc__.strip() == (
|
|
"Check equality and either forward a NotImplemented or\n"
|
|
" return the result negated."
|
|
)
|
|
assert method.__name__ == "__ne__"
|
|
|
|
def test_lt(self):
|
|
"""
|
|
__lt__ docstring and qualified name should be well behaved.
|
|
"""
|
|
method = self.cls.__lt__
|
|
assert method.__doc__.strip() == "Return a < b. Computed by attrs."
|
|
assert method.__name__ == "__lt__"
|
|
|
|
def test_le(self):
|
|
"""
|
|
__le__ docstring and qualified name should be well behaved.
|
|
"""
|
|
method = self.cls.__le__
|
|
assert method.__doc__.strip() == "Return a <= b. Computed by attrs."
|
|
assert method.__name__ == "__le__"
|
|
|
|
def test_gt(self):
|
|
"""
|
|
__gt__ docstring and qualified name should be well behaved.
|
|
"""
|
|
method = self.cls.__gt__
|
|
assert method.__doc__.strip() == "Return a > b. Computed by attrs."
|
|
assert method.__name__ == "__gt__"
|
|
|
|
def test_ge(self):
|
|
"""
|
|
__ge__ docstring and qualified name should be well behaved.
|
|
"""
|
|
method = self.cls.__ge__
|
|
assert method.__doc__.strip() == "Return a >= b. Computed by attrs."
|
|
assert method.__name__ == "__ge__"
|