import pytest from pybind11_tests import ConstructorStats def test_smart_ptr(capture): # Object1 from pybind11_tests import (MyObject1, make_object_1, make_object_2, print_object_1, print_object_2, print_object_3, print_object_4) for i, o in enumerate([make_object_1(), make_object_2(), MyObject1(3)], start=1): assert o.getRefCount() == 1 with capture: print_object_1(o) print_object_2(o) print_object_3(o) print_object_4(o) assert capture == "MyObject1[{i}]\n".format(i=i) * 4 from pybind11_tests import (make_myobject1_1, make_myobject1_2, print_myobject1_1, print_myobject1_2, print_myobject1_3, print_myobject1_4) for i, o in enumerate([make_myobject1_1(), make_myobject1_2(), MyObject1(6), 7], start=4): print(o) with capture: if not isinstance(o, int): print_object_1(o) print_object_2(o) print_object_3(o) print_object_4(o) print_myobject1_1(o) print_myobject1_2(o) print_myobject1_3(o) print_myobject1_4(o) assert capture == "MyObject1[{i}]\n".format(i=i) * (4 if isinstance(o, int) else 8) cstats = ConstructorStats.get(MyObject1) assert cstats.alive() == 0 expected_values = ['MyObject1[{}]'.format(i) for i in range(1, 7)] + ['MyObject1[7]'] * 4 assert cstats.values() == expected_values assert cstats.default_constructions == 0 assert cstats.copy_constructions == 0 # assert cstats.move_constructions >= 0 # Doesn't invoke any assert cstats.copy_assignments == 0 assert cstats.move_assignments == 0 # Object2 from pybind11_tests import (MyObject2, make_myobject2_1, make_myobject2_2, make_myobject3_1, make_myobject3_2, print_myobject2_1, print_myobject2_2, print_myobject2_3, print_myobject2_4) for i, o in zip([8, 6, 7], [MyObject2(8), make_myobject2_1(), make_myobject2_2()]): print(o) with capture: print_myobject2_1(o) print_myobject2_2(o) print_myobject2_3(o) print_myobject2_4(o) assert capture == "MyObject2[{i}]\n".format(i=i) * 4 cstats = ConstructorStats.get(MyObject2) assert cstats.alive() == 1 o = None assert cstats.alive() == 0 assert cstats.values() == ['MyObject2[8]', 'MyObject2[6]', 'MyObject2[7]'] assert cstats.default_constructions == 0 assert cstats.copy_constructions == 0 # assert cstats.move_constructions >= 0 # Doesn't invoke any assert cstats.copy_assignments == 0 assert cstats.move_assignments == 0 # Object3 from pybind11_tests import (MyObject3, print_myobject3_1, print_myobject3_2, print_myobject3_3, print_myobject3_4) for i, o in zip([9, 8, 9], [MyObject3(9), make_myobject3_1(), make_myobject3_2()]): print(o) with capture: print_myobject3_1(o) print_myobject3_2(o) print_myobject3_3(o) print_myobject3_4(o) assert capture == "MyObject3[{i}]\n".format(i=i) * 4 cstats = ConstructorStats.get(MyObject3) assert cstats.alive() == 1 o = None assert cstats.alive() == 0 assert cstats.values() == ['MyObject3[9]', 'MyObject3[8]', 'MyObject3[9]'] assert cstats.default_constructions == 0 assert cstats.copy_constructions == 0 # assert cstats.move_constructions >= 0 # Doesn't invoke any assert cstats.copy_assignments == 0 assert cstats.move_assignments == 0 # Object and ref from pybind11_tests import Object, cstats_ref cstats = ConstructorStats.get(Object) assert cstats.alive() == 0 assert cstats.values() == [] assert cstats.default_constructions == 10 assert cstats.copy_constructions == 0 # assert cstats.move_constructions >= 0 # Doesn't invoke any assert cstats.copy_assignments == 0 assert cstats.move_assignments == 0 cstats = cstats_ref() assert cstats.alive() == 0 assert cstats.values() == ['from pointer'] * 10 assert cstats.default_constructions == 30 assert cstats.copy_constructions == 12 # assert cstats.move_constructions >= 0 # Doesn't invoke any assert cstats.copy_assignments == 30 assert cstats.move_assignments == 0 def test_smart_ptr_refcounting(): from pybind11_tests import test_object1_refcounting assert test_object1_refcounting() def test_unique_nodelete(): from pybind11_tests import MyObject4 o = MyObject4(23) assert o.value == 23 cstats = ConstructorStats.get(MyObject4) assert cstats.alive() == 1 del o cstats = ConstructorStats.get(MyObject4) assert cstats.alive() == 1 # Leak, but that's intentional def test_shared_ptr_and_references(): from pybind11_tests.smart_ptr import SharedPtrRef, A s = SharedPtrRef() stats = ConstructorStats.get(A) assert stats.alive() == 2 ref = s.ref # init_holder_helper(holder_ptr=false, owned=false) assert stats.alive() == 2 assert s.set_ref(ref) with pytest.raises(RuntimeError) as excinfo: assert s.set_holder(ref) assert "Unable to cast from non-held to held instance" in str(excinfo.value) copy = s.copy # init_holder_helper(holder_ptr=false, owned=true) assert stats.alive() == 3 assert s.set_ref(copy) assert s.set_holder(copy) holder_ref = s.holder_ref # init_holder_helper(holder_ptr=true, owned=false) assert stats.alive() == 3 assert s.set_ref(holder_ref) assert s.set_holder(holder_ref) holder_copy = s.holder_copy # init_holder_helper(holder_ptr=true, owned=true) assert stats.alive() == 3 assert s.set_ref(holder_copy) assert s.set_holder(holder_copy) del ref, copy, holder_ref, holder_copy, s assert stats.alive() == 0 def test_shared_ptr_from_this_and_references(): from pybind11_tests.smart_ptr import SharedFromThisRef, B, SharedFromThisVirt s = SharedFromThisRef() stats = ConstructorStats.get(B) assert stats.alive() == 2 ref = s.ref # init_holder_helper(holder_ptr=false, owned=false, bad_wp=false) assert stats.alive() == 2 assert s.set_ref(ref) assert s.set_holder(ref) # std::enable_shared_from_this can create a holder from a reference bad_wp = s.bad_wp # init_holder_helper(holder_ptr=false, owned=false, bad_wp=true) assert stats.alive() == 2 assert s.set_ref(bad_wp) with pytest.raises(RuntimeError) as excinfo: assert s.set_holder(bad_wp) assert "Unable to cast from non-held to held instance" in str(excinfo.value) copy = s.copy # init_holder_helper(holder_ptr=false, owned=true, bad_wp=false) assert stats.alive() == 3 assert s.set_ref(copy) assert s.set_holder(copy) holder_ref = s.holder_ref # init_holder_helper(holder_ptr=true, owned=false, bad_wp=false) assert stats.alive() == 3 assert s.set_ref(holder_ref) assert s.set_holder(holder_ref) holder_copy = s.holder_copy # init_holder_helper(holder_ptr=true, owned=true, bad_wp=false) assert stats.alive() == 3 assert s.set_ref(holder_copy) assert s.set_holder(holder_copy) del ref, bad_wp, copy, holder_ref, holder_copy, s assert stats.alive() == 0 z = SharedFromThisVirt.get() y = SharedFromThisVirt.get() assert y is z def test_move_only_holder(): from pybind11_tests.smart_ptr import TypeWithMoveOnlyHolder a = TypeWithMoveOnlyHolder.make() stats = ConstructorStats.get(TypeWithMoveOnlyHolder) assert stats.alive() == 1 del a assert stats.alive() == 0 def test_smart_ptr_from_default(): from pybind11_tests.smart_ptr import HeldByDefaultHolder instance = HeldByDefaultHolder() with pytest.raises(RuntimeError) as excinfo: HeldByDefaultHolder.load_shared_ptr(instance) assert "Unable to load a custom holder type from a default-holder instance" in str(excinfo)