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objectinfertest.py
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objectinfertest.py
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from textwrap import dedent
import unittest
import rope.base.project
import rope.base.builtins
from rope.base import libutils
from ropetest import testutils
class ObjectInferTest(unittest.TestCase):
def setUp(self):
super().setUp()
self.project = testutils.sample_project()
def tearDown(self):
testutils.remove_project(self.project)
super().tearDown()
def test_simple_type_inferencing(self):
code = dedent("""\
class Sample(object):
pass
a_var = Sample()
""")
scope = libutils.get_string_scope(self.project, code)
sample_class = scope["Sample"].get_object()
a_var = scope["a_var"].get_object()
self.assertEqual(sample_class, a_var.get_type())
def test_simple_type_inferencing_classes_defined_in_holding_scope(self):
code = dedent("""\
class Sample(object):
pass
def a_func():
a_var = Sample()
""")
scope = libutils.get_string_scope(self.project, code)
sample_class = scope["Sample"].get_object()
a_var = scope["a_func"].get_object().get_scope()["a_var"].get_object()
self.assertEqual(sample_class, a_var.get_type())
def test_simple_type_inferencing_classes_in_class_methods(self):
code = dedent("""\
class Sample(object):
pass
class Another(object):
def a_method():
a_var = Sample()
""")
scope = libutils.get_string_scope(self.project, code)
sample_class = scope["Sample"].get_object()
another_class = scope["Another"].get_object()
a_var = another_class["a_method"].get_object().get_scope()["a_var"].get_object()
self.assertEqual(sample_class, a_var.get_type())
def test_simple_type_inferencing_class_attributes(self):
code = dedent("""\
class Sample(object):
pass
class Another(object):
def __init__(self):
self.a_var = Sample()
""")
scope = libutils.get_string_scope(self.project, code)
sample_class = scope["Sample"].get_object()
another_class = scope["Another"].get_object()
a_var = another_class["a_var"].get_object()
self.assertEqual(sample_class, a_var.get_type())
def test_simple_type_inferencing_for_in_class_assignments(self):
code = dedent("""\
class Sample(object):
pass
class Another(object):
an_attr = Sample()
""")
scope = libutils.get_string_scope(self.project, code)
sample_class = scope["Sample"].get_object()
another_class = scope["Another"].get_object()
an_attr = another_class["an_attr"].get_object()
self.assertEqual(sample_class, an_attr.get_type())
def test_simple_type_inferencing_for_chained_assignments(self):
mod = dedent("""\
class Sample(object):
pass
copied_sample = Sample""")
mod_scope = libutils.get_string_scope(self.project, mod)
sample_class = mod_scope["Sample"]
copied_sample = mod_scope["copied_sample"]
self.assertEqual(sample_class.get_object(), copied_sample.get_object())
def test_following_chained_assignments_avoiding_circles(self):
mod = dedent("""\
class Sample(object):
pass
sample_class = Sample
sample_class = sample_class
""")
mod_scope = libutils.get_string_scope(self.project, mod)
sample_class = mod_scope["Sample"]
sample_class_var = mod_scope["sample_class"]
self.assertEqual(sample_class.get_object(), sample_class_var.get_object())
def test_function_returned_object_static_type_inference1(self):
src = dedent("""\
class Sample(object):
pass
def a_func():
return Sample
a_var = a_func()
""")
scope = libutils.get_string_scope(self.project, src)
sample_class = scope["Sample"]
a_var = scope["a_var"]
self.assertEqual(sample_class.get_object(), a_var.get_object())
def test_function_returned_object_static_type_inference2(self):
src = dedent("""\
class Sample(object):
pass
def a_func():
return Sample()
a_var = a_func()
""")
scope = libutils.get_string_scope(self.project, src)
sample_class = scope["Sample"].get_object()
a_var = scope["a_var"].get_object()
self.assertEqual(sample_class, a_var.get_type())
def test_recursive_function_returned_object_static_type_inference(self):
src = dedent("""\
class Sample(object):
pass
def a_func():
if True:
return Sample()
else:
return a_func()
a_var = a_func()
""")
scope = libutils.get_string_scope(self.project, src)
sample_class = scope["Sample"].get_object()
a_var = scope["a_var"].get_object()
self.assertEqual(sample_class, a_var.get_type())
def test_func_returned_obj_using_call_spec_func_static_type_infer(self):
src = dedent("""\
class Sample(object):
def __call__(self):
return Sample
sample = Sample()
a_var = sample()""")
scope = libutils.get_string_scope(self.project, src)
sample_class = scope["Sample"]
a_var = scope["a_var"]
self.assertEqual(sample_class.get_object(), a_var.get_object())
def test_list_type_inferencing(self):
src = dedent("""\
class Sample(object):
pass
a_var = [Sample()]
""")
scope = libutils.get_string_scope(self.project, src)
sample_class = scope["Sample"].get_object()
a_var = scope["a_var"].get_object()
self.assertNotEqual(sample_class, a_var.get_type())
def test_attributed_object_inference(self):
src = dedent("""\
class Sample(object):
def __init__(self):
self.a_var = None
def set(self):
self.a_var = Sample()
""")
scope = libutils.get_string_scope(self.project, src)
sample_class = scope["Sample"].get_object()
a_var = sample_class["a_var"].get_object()
self.assertEqual(sample_class, a_var.get_type())
def test_getting_property_attributes(self):
src = dedent("""\
class A(object):
pass
def f(*args):
return A()
class B(object):
p = property(f)
a_var = B().p
""")
pymod = libutils.get_string_module(self.project, src)
a_class = pymod["A"].get_object()
a_var = pymod["a_var"].get_object()
self.assertEqual(a_class, a_var.get_type())
def test_getting_property_attributes_with_method_getters(self):
src = dedent("""\
class A(object):
pass
class B(object):
def p_get(self):
return A()
p = property(p_get)
a_var = B().p
""")
pymod = libutils.get_string_module(self.project, src)
a_class = pymod["A"].get_object()
a_var = pymod["a_var"].get_object()
self.assertEqual(a_class, a_var.get_type())
def test_lambda_functions(self):
code = dedent("""\
class C(object):
pass
l = lambda: C()
a_var = l()""")
mod = libutils.get_string_module(self.project, code)
c_class = mod["C"].get_object()
a_var = mod["a_var"].get_object()
self.assertEqual(c_class, a_var.get_type())
def test_mixing_subscript_with_tuple_assigns(self):
code = dedent("""\
class C(object):
attr = 0
d = {}
d[0], b = (0, C())
""")
mod = libutils.get_string_module(self.project, code)
c_class = mod["C"].get_object()
a_var = mod["b"].get_object()
self.assertEqual(c_class, a_var.get_type())
def test_mixing_ass_attr_with_tuple_assignment(self):
code = dedent("""\
class C(object):
attr = 0
c = C()
c.attr, b = (0, C())
""")
mod = libutils.get_string_module(self.project, code)
c_class = mod["C"].get_object()
a_var = mod["b"].get_object()
self.assertEqual(c_class, a_var.get_type())
def test_mixing_slice_with_tuple_assigns(self):
code = dedent("""\
class C(object):
attr = 0
d = [None] * 3
d[0:2], b = ((0,), C())
""")
mod = libutils.get_string_module(self.project, code)
c_class = mod["C"].get_object()
a_var = mod["b"].get_object()
self.assertEqual(c_class, a_var.get_type())
def test_nested_tuple_assignments(self):
code = dedent("""\
class C1(object):
pass
class C2(object):
pass
a, (b, c) = (C1(), (C2(), C1()))
""")
mod = libutils.get_string_module(self.project, code)
c1_class = mod["C1"].get_object()
c2_class = mod["C2"].get_object()
a_var = mod["a"].get_object()
b_var = mod["b"].get_object()
c_var = mod["c"].get_object()
self.assertEqual(c1_class, a_var.get_type())
self.assertEqual(c2_class, b_var.get_type())
self.assertEqual(c1_class, c_var.get_type())
def test_empty_tuples(self):
code = dedent("""\
t = ()
a, b = t
""")
mod = libutils.get_string_module(self.project, code)
a = mod["a"].get_object() # noqa
def test_handling_generator_functions(self):
code = dedent("""\
class C(object):
pass
def f():
yield C()
for c in f():
a_var = c
""")
mod = libutils.get_string_module(self.project, code)
c_class = mod["C"].get_object()
a_var = mod["a_var"].get_object()
self.assertEqual(c_class, a_var.get_type())
def test_handling_generator_functions_for_strs(self):
mod = testutils.create_module(self.project, "mod")
mod.write(dedent("""\
def f():
yield ""
for s in f():
a_var = s
"""))
pymod = self.project.get_pymodule(mod)
a_var = pymod["a_var"].get_object()
self.assertTrue(isinstance(a_var.get_type(), rope.base.builtins.Str))
def test_considering_nones_to_be_unknowns(self):
code = dedent("""\
class C(object):
pass
a_var = None
a_var = C()
a_var = None
""")
mod = libutils.get_string_module(self.project, code)
c_class = mod["C"].get_object()
a_var = mod["a_var"].get_object()
self.assertEqual(c_class, a_var.get_type())
def test_basic_list_comprehensions(self):
code = dedent("""\
class C(object):
pass
l = [C() for i in range(1)]
a_var = l[0]
""")
mod = libutils.get_string_module(self.project, code)
c_class = mod["C"].get_object()
a_var = mod["a_var"].get_object()
self.assertEqual(c_class, a_var.get_type())
def test_basic_generator_expressions(self):
code = dedent("""\
class C(object):
pass
l = (C() for i in range(1))
a_var = list(l)[0]
""")
mod = libutils.get_string_module(self.project, code)
c_class = mod["C"].get_object()
a_var = mod["a_var"].get_object()
self.assertEqual(c_class, a_var.get_type())
def test_list_comprehensions_and_loop_var(self):
code = dedent("""\
class C(object):
pass
c_objects = [C(), C()]
l = [c for c in c_objects]
a_var = l[0]
""")
mod = libutils.get_string_module(self.project, code)
c_class = mod["C"].get_object()
a_var = mod["a_var"].get_object()
self.assertEqual(c_class, a_var.get_type())
def test_list_comprehensions_and_multiple_loop_var(self):
code = dedent("""\
class C1(object):
pass
class C2(object):
pass
l = [(c1, c2) for c1 in [C1()] for c2 in [C2()]]
a, b = l[0]
""")
mod = libutils.get_string_module(self.project, code)
c1_class = mod["C1"].get_object()
c2_class = mod["C2"].get_object()
a_var = mod["a"].get_object()
b_var = mod["b"].get_object()
self.assertEqual(c1_class, a_var.get_type())
self.assertEqual(c2_class, b_var.get_type())
def test_list_comprehensions_and_multiple_iters(self):
code = dedent("""\
class C1(object):
pass
class C2(object):
pass
l = [(c1, c2) for c1, c2 in [(C1(), C2())]]
a, b = l[0]
""")
mod = libutils.get_string_module(self.project, code)
c1_class = mod["C1"].get_object()
c2_class = mod["C2"].get_object()
a_var = mod["a"].get_object()
b_var = mod["b"].get_object()
self.assertEqual(c1_class, a_var.get_type())
self.assertEqual(c2_class, b_var.get_type())
def test_we_know_the_type_of_caught_exceptions(self):
code = dedent("""\
class MyError(Exception):
pass
try:
raise MyError()
except MyError as e:
pass
""")
mod = libutils.get_string_module(self.project, code)
my_error = mod["MyError"].get_object()
e_var = mod["e"].get_object()
self.assertEqual(my_error, e_var.get_type())
def test_we_know_the_type_of_caught_multiple_excepts(self):
code = dedent("""\
class MyError(Exception):
pass
try:
raise MyError()
except (MyError, Exception) as e:
pass
""")
mod = libutils.get_string_module(self.project, code)
my_error = mod["MyError"].get_object()
e_var = mod["e"].get_object()
self.assertEqual(my_error, e_var.get_type())
def test_using_property_as_decorators(self):
code = dedent("""\
class A(object):
pass
class B(object):
@property
def f(self):
return A()
b = B()
var = b.f
""")
mod = libutils.get_string_module(self.project, code)
var = mod["var"].get_object()
a = mod["A"].get_object()
self.assertEqual(a, var.get_type())
def test_using_property_as_decorators_and_passing_parameter(self):
code = dedent("""\
class B(object):
@property
def f(self):
return self
b = B()
var = b.f
""")
mod = libutils.get_string_module(self.project, code)
var = mod["var"].get_object()
a = mod["B"].get_object()
self.assertEqual(a, var.get_type())