def test_mixed_truth_restricted_type(self) -> None:
# join_types against differently restricted truthiness types drops restrictions.
true_any = true_only(AnyType(TypeOfAny.special_form))
false_o = false_only(self.fx.o)
j = join_types(true_any, false_o)
assert_true(j.can_be_true)
assert_true(j.can_be_false)
def test_mixed_truth_restricted_type(self):
# join_types against differently restricted truthiness types drops restrictions.
true_any = true_only(AnyType())
false_o = false_only(self.fx.o)
j = join_types(true_any, false_o)
assert_true(j.can_be_true)
assert_true(j.can_be_false)
def test_mixed_truth_restricted_type_simple(self) -> None:
# join_simple against differently restricted truthiness types drops restrictions.
true_a = true_only(self.fx.a)
false_o = false_only(self.fx.o)
j = join_simple(self.fx.o, true_a, false_o)
assert_true(j.can_be_true)
assert_true(j.can_be_false)
def test_mixed_truth_restricted_type_simple(self):
# join_simple against differently restricted truthiness types drops restrictions.
true_a = true_only(self.fx.a)
false_o = false_only(self.fx.o)
j = join_simple(self.fx.o, true_a, false_o)
assert_true(j.can_be_true)
assert_true(j.can_be_false)
def test_false_only_of_instance(self) -> None:
fo = false_only(self.fx.a)
assert_equal(str(fo), "A")
assert_false(fo.can_be_true)
assert_true(fo.can_be_false)
assert_type(Instance, fo)
# The original class still can be true
assert_true(self.fx.a.can_be_true)
def test_is_proper_subtype_invariance(self):
fx = self.fx
assert_true(is_proper_subtype(fx.gsab, fx.gb))
assert_false(is_proper_subtype(fx.gsab, fx.ga))
assert_false(is_proper_subtype(fx.gsaa, fx.gb))
assert_false(is_proper_subtype(fx.gb, fx.ga))
assert_false(is_proper_subtype(fx.ga, fx.gb))
def test_true_only_of_instance(self) -> None:
to = true_only(self.fx.a)
assert_equal(str(to), "A")
assert_true(to.can_be_true)
assert_false(to.can_be_false)
assert_type(Instance, to)
# The original class still can be false
assert_true(self.fx.a.can_be_false)
def test_true_only_of_instance(self):
to = true_only(self.fx.a)
assert_equal(str(to), "A")
assert_true(to.can_be_true)
assert_false(to.can_be_false)
assert_type(Instance, to)
# The original class still can be false
assert_true(self.fx.a.can_be_false)
def test_false_only_of_instance(self):
fo = false_only(self.fx.a)
assert_equal(str(fo), "A")
assert_false(fo.can_be_true)
assert_true(fo.can_be_false)
assert_type(Instance, fo)
# The original class still can be true
assert_true(self.fx.a.can_be_true)
def test_is_proper_subtype_invariance(self):
fx = self.fx
assert_true(is_proper_subtype(fx.gsab, fx.gb))
assert_false(is_proper_subtype(fx.gsab, fx.ga))
assert_false(is_proper_subtype(fx.gsaa, fx.gb))
assert_false(is_proper_subtype(fx.gb, fx.ga))
assert_false(is_proper_subtype(fx.ga, fx.gb))
def assert_simple_meet(self, s: Type, t: Type, meet: Type) -> None:
result = meet_types(s, t)
actual = str(result)
expected = str(meet)
assert_equal(actual, expected,
'meet({}, {}) == {{}} ({{}} expected)'.format(s, t))
assert_true(is_subtype(result, s),
'{} not subtype of {}'.format(result, s))
assert_true(is_subtype(result, t),
'{} not subtype of {}'.format(result, t))
def test_true_only_of_union(self):
tup_type = self.tuple(AnyType())
# Union of something that is unknown, something that is always true, something
# that is always false
union_type = UnionType([self.fx.a, tup_type, self.tuple()])
to = true_only(union_type)
assert_equal(len(to.items), 2)
assert_true(to.items[0].can_be_true)
assert_false(to.items[0].can_be_false)
assert_true(to.items[1] is tup_type)
def assert_simple_join(self, s: Type, t: Type, join: Type) -> None:
result = join_types(s, t)
actual = str(result)
expected = str(join)
assert_equal(actual, expected,
'join({}, {}) == {{}} ({{}} expected)'.format(s, t))
assert_true(is_subtype(s, result),
'{} not subtype of {}'.format(s, result))
assert_true(is_subtype(t, result),
'{} not subtype of {}'.format(t, result))
def test_simple_type_objects(self):
t1 = self.type_callable(self.fx.a, self.fx.a)
t2 = self.type_callable(self.fx.b, self.fx.b)
self.assert_join(t1, t1, t1)
assert_true(join_types(t1, t1, self.fx.basic).is_type_obj())
self.assert_join(t1, t2, self.fx.std_type)
self.assert_join(t1, self.fx.std_type, self.fx.std_type)
self.assert_join(self.fx.std_type, self.fx.std_type, self.fx.std_type)
def test_simple_type_objects(self):
t1 = self.type_callable(self.fx.a, self.fx.a)
t2 = self.type_callable(self.fx.b, self.fx.b)
self.assert_join(t1, t1, t1)
assert_true(join_types(t1, t1).is_type_obj())
self.assert_join(t1, t2, self.fx.type_type)
self.assert_join(t1, self.fx.type_type, self.fx.type_type)
self.assert_join(self.fx.type_type, self.fx.type_type,
self.fx.type_type)
def assert_simple_join(self, s, t, join):
result = join_types(s, t)
actual = str(result)
expected = str(join)
assert_equal(actual, expected,
'join({}, {}) == {{}} ({{}} expected)'.format(s, t))
if not isinstance(s, ErrorType) and not isinstance(result, ErrorType):
assert_true(is_subtype(s, result),
'{} not subtype of {}'.format(s, result))
if not isinstance(t, ErrorType) and not isinstance(result, ErrorType):
assert_true(is_subtype(t, result),
'{} not subtype of {}'.format(t, result))
def assert_simple_meet(self, s, t, meet):
result = meet_types(s, t)
actual = str(result)
expected = str(meet)
assert_equal(actual, expected,
'meet({}, {}) == {{}} ({{}} expected)'.format(s, t))
if not isinstance(s, ErrorType) and not isinstance(result, ErrorType):
assert_true(is_subtype(result, s),
'{} not subtype of {}'.format(result, s))
if not isinstance(t, ErrorType) and not isinstance(result, ErrorType):
assert_true(is_subtype(result, t),
'{} not subtype of {}'.format(result, t))
def assert_simple_meet(self, s, t, meet):
result = meet_types(s, t)
actual = str(result)
expected = str(meet)
assert_equal(actual, expected,
'meet({}, {}) == {{}} ({{}} expected)'.format(s, t))
if not isinstance(s, ErrorType) and not isinstance(result, ErrorType):
assert_true(is_subtype(result, s),
'{} not subtype of {}'.format(result, s))
if not isinstance(t, ErrorType) and not isinstance(result, ErrorType):
assert_true(is_subtype(result, t),
'{} not subtype of {}'.format(result, t))
def assert_simple_join(self, s, t, join):
result = join_types(s, t)
actual = str(result)
expected = str(join)
assert_equal(actual, expected,
'join({}, {}) == {{}} ({{}} expected)'.format(s, t))
if not isinstance(s, ErrorType) and not isinstance(result, ErrorType):
assert_true(is_subtype(s, result),
'{} not subtype of {}'.format(s, result))
if not isinstance(t, ErrorType) and not isinstance(result, ErrorType):
assert_true(is_subtype(t, result),
'{} not subtype of {}'.format(t, result))
def test_false_only_of_union(self) -> None:
tup_type = self.tuple()
# Union of something that is unknown, something that is always true, something
# that is always false
union_type = UnionType([self.fx.a, self.tuple(AnyType()), tup_type])
assert_equal(len(union_type.items), 3)
fo = false_only(union_type)
assert isinstance(fo, UnionType)
assert_equal(len(fo.items), 2)
assert_false(fo.items[0].can_be_true)
assert_true(fo.items[0].can_be_false)
assert_true(fo.items[1] is tup_type)
def test_false_only_of_union(self) -> None:
tup_type = self.tuple()
# Union of something that is unknown, something that is always true, something
# that is always false
union_type = UnionType([self.fx.a, self.tuple(AnyType()), tup_type])
assert_equal(len(union_type.items), 3)
fo = false_only(union_type)
assert isinstance(fo, UnionType)
assert_equal(len(fo.items), 2)
assert_false(fo.items[0].can_be_true)
assert_true(fo.items[0].can_be_false)
assert_true(fo.items[1] is tup_type)
def test_simple_type_objects(self) -> None:
t1 = self.type_callable(self.fx.a, self.fx.a)
t2 = self.type_callable(self.fx.b, self.fx.b)
self.assert_join(t1, t1, t1)
j = join_types(t1, t1)
assert isinstance(j, CallableType)
assert_true(j.is_type_obj())
self.assert_join(t1, t2, self.fx.type_type)
self.assert_join(t1, self.fx.type_type, self.fx.type_type)
self.assert_join(self.fx.type_type, self.fx.type_type,
self.fx.type_type)
def test_is_more_precise(self):
fx = self.fx
assert_true(is_more_precise(fx.b, fx.a))
assert_true(is_more_precise(fx.b, fx.b))
assert_true(is_more_precise(fx.b, fx.b))
assert_true(is_more_precise(fx.b, fx.anyt))
assert_true(is_more_precise(self.tuple(fx.b, fx.a),
self.tuple(fx.b, fx.a)))
assert_false(is_more_precise(fx.a, fx.b))
assert_false(is_more_precise(fx.anyt, fx.b))
assert_false(is_more_precise(self.tuple(fx.b, fx.b),
self.tuple(fx.b, fx.a)))
def test_simple_type_objects(self) -> None:
t1 = self.type_callable(self.fx.a, self.fx.a)
t2 = self.type_callable(self.fx.b, self.fx.b)
self.assert_join(t1, t1, t1)
j = join_types(t1, t1)
assert isinstance(j, CallableType)
assert_true(j.is_type_obj())
self.assert_join(t1, t2, self.fx.type_type)
self.assert_join(t1, self.fx.type_type, self.fx.type_type)
self.assert_join(self.fx.type_type, self.fx.type_type,
self.fx.type_type)
def test_is_more_precise(self):
fx = self.fx
assert_true(is_more_precise(fx.b, fx.a))
assert_true(is_more_precise(fx.b, fx.b))
assert_true(is_more_precise(fx.b, fx.b))
assert_true(is_more_precise(fx.b, fx.anyt))
assert_true(
is_more_precise(self.tuple(fx.b, fx.a), self.tuple(fx.b, fx.a)))
assert_false(is_more_precise(fx.a, fx.b))
assert_false(is_more_precise(fx.anyt, fx.b))
assert_false(
is_more_precise(self.tuple(fx.b, fx.b), self.tuple(fx.b, fx.a)))
def test_is_in_module_collection(self):
assert_true(moduleinfo.is_in_module_collection({'foo'}, 'foo'))
assert_true(moduleinfo.is_in_module_collection({'foo'}, 'foo.bar'))
assert_false(moduleinfo.is_in_module_collection({'foo'}, 'fo'))
assert_true(moduleinfo.is_in_module_collection({'foo.bar'}, 'foo.bar'))
assert_true(moduleinfo.is_in_module_collection({'foo.bar'}, 'foo.bar.zar'))
assert_false(moduleinfo.is_in_module_collection({'foo.bar'}, 'foo'))
def test_is_in_module_collection(self):
assert_true(moduleinfo.is_in_module_collection({'foo'}, 'foo'))
assert_true(moduleinfo.is_in_module_collection({'foo'}, 'foo.bar'))
assert_false(moduleinfo.is_in_module_collection({'foo'}, 'fo'))
assert_true(moduleinfo.is_in_module_collection({'foo.bar'}, 'foo.bar'))
assert_true(
moduleinfo.is_in_module_collection({'foo.bar'}, 'foo.bar.zar'))
assert_false(moduleinfo.is_in_module_collection({'foo.bar'}, 'foo'))
def test_is_proper_subtype_covariance(self) -> None:
fx_co = self.fx_co
assert_true(is_proper_subtype(fx_co.gsab, fx_co.gb))
assert_true(is_proper_subtype(fx_co.gsab, fx_co.ga))
assert_false(is_proper_subtype(fx_co.gsaa, fx_co.gb))
assert_true(is_proper_subtype(fx_co.gb, fx_co.ga))
assert_false(is_proper_subtype(fx_co.ga, fx_co.gb))
def test_is_proper_subtype_covariance(self) -> None:
fx_co = self.fx_co
assert_true(is_proper_subtype(fx_co.gsab, fx_co.gb))
assert_true(is_proper_subtype(fx_co.gsab, fx_co.ga))
assert_false(is_proper_subtype(fx_co.gsaa, fx_co.gb))
assert_true(is_proper_subtype(fx_co.gb, fx_co.ga))
assert_false(is_proper_subtype(fx_co.ga, fx_co.gb))
def test_is_proper_subtype_contravariance(self):
fx_contra = self.fx_contra
assert_true(is_proper_subtype(fx_contra.gsab, fx_contra.gb))
assert_false(is_proper_subtype(fx_contra.gsab, fx_contra.ga))
assert_true(is_proper_subtype(fx_contra.gsaa, fx_contra.gb))
assert_false(is_proper_subtype(fx_contra.gb, fx_contra.ga))
assert_true(is_proper_subtype(fx_contra.ga, fx_contra.gb))
def test_is_proper_subtype_contravariance(self):
fx_contra = self.fx_contra
assert_true(is_proper_subtype(fx_contra.gsab, fx_contra.gb))
assert_false(is_proper_subtype(fx_contra.gsab, fx_contra.ga))
assert_true(is_proper_subtype(fx_contra.gsaa, fx_contra.gb))
assert_false(is_proper_subtype(fx_contra.gb, fx_contra.ga))
assert_true(is_proper_subtype(fx_contra.ga, fx_contra.gb))
def test_true_only_of_true_type_is_idempotent(self):
always_true = self.tuple(AnyType())
to = true_only(always_true)
assert_true(always_true is to)
def test_false_only_of_false_type_is_idempotent(self):
always_false = NoneTyp()
fo = false_only(always_false)
assert_true(always_false is fo)
def assert_subtype(self, s, t):
assert_true(is_subtype(s, t), '{} not subtype of {}'.format(s, t))
def test_true_only_of_true_type_is_idempotent(self) -> None:
always_true = self.tuple(AnyType(TypeOfAny.special_form))
to = true_only(always_true)
assert_true(always_true is to)
def test_empty_tuple_always_false(self):
tuple_type = self.tuple()
assert_true(tuple_type.can_be_false)
assert_false(tuple_type.can_be_true)
def test_union_can_be_true_if_any_true(self):
union_type = UnionType([self.fx.a, self.tuple()])
assert_true(union_type.can_be_true)
def assert_not_subtype(self, s, t):
assert_true(not is_subtype(s, t), '{} subtype of {}'.format(s, t))
def assert_subtype(self, s, t):
assert_true(is_subtype(s, t), '{} not subtype of {}'.format(s, t))
def test_nonempty_tuple_always_true(self) -> None:
tuple_type = self.tuple(AnyType(), AnyType())
assert_true(tuple_type.can_be_true)
assert_false(tuple_type.can_be_false)
def test_is_proper_subtype(self) -> None:
fx = self.fx
assert_true(is_proper_subtype(fx.a, fx.a))
assert_true(is_proper_subtype(fx.b, fx.a))
assert_true(is_proper_subtype(fx.b, fx.o))
assert_true(is_proper_subtype(fx.b, fx.o))
assert_false(is_proper_subtype(fx.a, fx.b))
assert_false(is_proper_subtype(fx.o, fx.b))
assert_true(is_proper_subtype(fx.anyt, fx.anyt))
assert_false(is_proper_subtype(fx.a, fx.anyt))
assert_false(is_proper_subtype(fx.anyt, fx.a))
assert_true(is_proper_subtype(fx.ga, fx.ga))
assert_true(is_proper_subtype(fx.gdyn, fx.gdyn))
assert_false(is_proper_subtype(fx.ga, fx.gdyn))
assert_false(is_proper_subtype(fx.gdyn, fx.ga))
assert_true(is_proper_subtype(fx.t, fx.t))
assert_false(is_proper_subtype(fx.t, fx.s))
assert_true(is_proper_subtype(fx.a, UnionType([fx.a, fx.b])))
assert_true(
is_proper_subtype(UnionType([fx.a, fx.b]),
UnionType([fx.a, fx.b, fx.c])))
assert_false(
is_proper_subtype(UnionType([fx.a, fx.b]), UnionType([fx.b,
fx.c])))
def test_empty_tuple_always_false(self) -> None:
tuple_type = self.tuple()
assert_true(tuple_type.can_be_false)
assert_false(tuple_type.can_be_true)
def test_nonempty_tuple_always_true(self) -> None:
tuple_type = self.tuple(AnyType(TypeOfAny.special_form),
AnyType(TypeOfAny.special_form))
assert_true(tuple_type.can_be_true)
assert_false(tuple_type.can_be_false)
def test_union_can_be_true_if_any_true(self) -> None:
union_type = UnionType([self.fx.a, self.tuple()])
assert_true(union_type.can_be_true)
def test_union_can_be_false_if_any_false(self):
union_type = UnionType([self.fx.a, self.tuple()])
assert_true(union_type.can_be_false)
def assert_not_subtype(self, s: Type, t: Type) -> None:
assert_true(not is_subtype(s, t), '{} subtype of {}'.format(s, t))
def assert_not_subtype(self, s: Type, t: Type) -> None:
assert_true(not is_subtype(s, t), '{} subtype of {}'.format(s, t))
def test_is_proper_subtype(self):
fx = self.fx
assert_true(is_proper_subtype(fx.a, fx.a))
assert_true(is_proper_subtype(fx.b, fx.a))
assert_true(is_proper_subtype(fx.b, fx.o))
assert_true(is_proper_subtype(fx.b, fx.o))
assert_false(is_proper_subtype(fx.a, fx.b))
assert_false(is_proper_subtype(fx.o, fx.b))
assert_true(is_proper_subtype(fx.anyt, fx.anyt))
assert_false(is_proper_subtype(fx.a, fx.anyt))
assert_false(is_proper_subtype(fx.anyt, fx.a))
assert_true(is_proper_subtype(fx.ga, fx.ga))
assert_true(is_proper_subtype(fx.gdyn, fx.gdyn))
assert_false(is_proper_subtype(fx.ga, fx.gdyn))
assert_false(is_proper_subtype(fx.gdyn, fx.ga))
assert_true(is_proper_subtype(fx.t, fx.t))
assert_false(is_proper_subtype(fx.t, fx.s))
def assert_not_subtype(self, s, t):
assert_true(not is_subtype(s, t), '{} subtype of {}'.format(s, t))
def test_nonempty_tuple_always_true(self):
tuple_type = self.tuple(AnyType(), AnyType())
assert_true(tuple_type.can_be_true)
assert_false(tuple_type.can_be_false)
def test_is_proper_subtype(self):
fx = self.fx
assert_true(is_proper_subtype(fx.a, fx.a))
assert_true(is_proper_subtype(fx.b, fx.a))
assert_true(is_proper_subtype(fx.b, fx.o))
assert_true(is_proper_subtype(fx.b, fx.o))
assert_false(is_proper_subtype(fx.a, fx.b))
assert_false(is_proper_subtype(fx.o, fx.b))
assert_true(is_proper_subtype(fx.anyt, fx.anyt))
assert_false(is_proper_subtype(fx.a, fx.anyt))
assert_false(is_proper_subtype(fx.anyt, fx.a))
assert_true(is_proper_subtype(fx.ga, fx.ga))
assert_true(is_proper_subtype(fx.gdyn, fx.gdyn))
assert_false(is_proper_subtype(fx.ga, fx.gdyn))
assert_false(is_proper_subtype(fx.gdyn, fx.ga))
assert_true(is_proper_subtype(fx.t, fx.t))
assert_false(is_proper_subtype(fx.t, fx.s))
def test_union_can_be_false_if_any_false(self) -> None:
union_type = UnionType([self.fx.a, self.tuple()])
assert_true(union_type.can_be_false)
def test_false_only_of_false_type_is_idempotent(self) -> None:
always_false = NoneTyp()
fo = false_only(always_false)
assert_true(always_false is fo)