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315 lines
9.3 KiB
315 lines
9.3 KiB
import pytest |
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m = pytest.importorskip("pybind11_tests.smart_ptr") |
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from pybind11_tests import ConstructorStats # noqa: E402 |
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def test_smart_ptr(capture): |
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# Object1 |
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for i, o in enumerate( |
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[m.make_object_1(), m.make_object_2(), m.MyObject1(3)], start=1 |
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): |
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assert o.getRefCount() == 1 |
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with capture: |
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m.print_object_1(o) |
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m.print_object_2(o) |
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m.print_object_3(o) |
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m.print_object_4(o) |
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assert capture == f"MyObject1[{i}]\n" * 4 |
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for i, o in enumerate( |
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[m.make_myobject1_1(), m.make_myobject1_2(), m.MyObject1(6), 7], start=4 |
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): |
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print(o) |
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with capture: |
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if not isinstance(o, int): |
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m.print_object_1(o) |
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m.print_object_2(o) |
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m.print_object_3(o) |
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m.print_object_4(o) |
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m.print_myobject1_1(o) |
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m.print_myobject1_2(o) |
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m.print_myobject1_3(o) |
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m.print_myobject1_4(o) |
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times = 4 if isinstance(o, int) else 8 |
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assert capture == f"MyObject1[{i}]\n" * times |
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cstats = ConstructorStats.get(m.MyObject1) |
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assert cstats.alive() == 0 |
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expected_values = [f"MyObject1[{i}]" for i in range(1, 7)] + ["MyObject1[7]"] * 4 |
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assert cstats.values() == expected_values |
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assert cstats.default_constructions == 0 |
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assert cstats.copy_constructions == 0 |
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# assert cstats.move_constructions >= 0 # Doesn't invoke any |
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assert cstats.copy_assignments == 0 |
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assert cstats.move_assignments == 0 |
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# Object2 |
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for i, o in zip( |
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[8, 6, 7], [m.MyObject2(8), m.make_myobject2_1(), m.make_myobject2_2()] |
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): |
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print(o) |
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with capture: |
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m.print_myobject2_1(o) |
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m.print_myobject2_2(o) |
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m.print_myobject2_3(o) |
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m.print_myobject2_4(o) |
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assert capture == f"MyObject2[{i}]\n" * 4 |
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cstats = ConstructorStats.get(m.MyObject2) |
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assert cstats.alive() == 1 |
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o = None |
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assert cstats.alive() == 0 |
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assert cstats.values() == ["MyObject2[8]", "MyObject2[6]", "MyObject2[7]"] |
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assert cstats.default_constructions == 0 |
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assert cstats.copy_constructions == 0 |
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# assert cstats.move_constructions >= 0 # Doesn't invoke any |
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assert cstats.copy_assignments == 0 |
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assert cstats.move_assignments == 0 |
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# Object3 |
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for i, o in zip( |
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[9, 8, 9], [m.MyObject3(9), m.make_myobject3_1(), m.make_myobject3_2()] |
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): |
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print(o) |
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with capture: |
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m.print_myobject3_1(o) |
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m.print_myobject3_2(o) |
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m.print_myobject3_3(o) |
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m.print_myobject3_4(o) |
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assert capture == f"MyObject3[{i}]\n" * 4 |
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cstats = ConstructorStats.get(m.MyObject3) |
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assert cstats.alive() == 1 |
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o = None |
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assert cstats.alive() == 0 |
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assert cstats.values() == ["MyObject3[9]", "MyObject3[8]", "MyObject3[9]"] |
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assert cstats.default_constructions == 0 |
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assert cstats.copy_constructions == 0 |
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# assert cstats.move_constructions >= 0 # Doesn't invoke any |
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assert cstats.copy_assignments == 0 |
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assert cstats.move_assignments == 0 |
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# Object |
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cstats = ConstructorStats.get(m.Object) |
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assert cstats.alive() == 0 |
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assert cstats.values() == [] |
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assert cstats.default_constructions == 10 |
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assert cstats.copy_constructions == 0 |
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# assert cstats.move_constructions >= 0 # Doesn't invoke any |
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assert cstats.copy_assignments == 0 |
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assert cstats.move_assignments == 0 |
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# ref<> |
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cstats = m.cstats_ref() |
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assert cstats.alive() == 0 |
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assert cstats.values() == ["from pointer"] * 10 |
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assert cstats.default_constructions == 30 |
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assert cstats.copy_constructions == 12 |
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# assert cstats.move_constructions >= 0 # Doesn't invoke any |
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assert cstats.copy_assignments == 30 |
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assert cstats.move_assignments == 0 |
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def test_smart_ptr_refcounting(): |
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assert m.test_object1_refcounting() |
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def test_unique_nodelete(): |
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o = m.MyObject4(23) |
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assert o.value == 23 |
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cstats = ConstructorStats.get(m.MyObject4) |
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assert cstats.alive() == 1 |
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del o |
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assert cstats.alive() == 1 |
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m.MyObject4.cleanup_all_instances() |
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assert cstats.alive() == 0 |
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def test_unique_nodelete4a(): |
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o = m.MyObject4a(23) |
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assert o.value == 23 |
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cstats = ConstructorStats.get(m.MyObject4a) |
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assert cstats.alive() == 1 |
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del o |
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assert cstats.alive() == 1 |
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m.MyObject4a.cleanup_all_instances() |
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assert cstats.alive() == 0 |
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def test_unique_deleter(): |
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m.MyObject4a(0) |
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o = m.MyObject4b(23) |
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assert o.value == 23 |
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cstats4a = ConstructorStats.get(m.MyObject4a) |
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assert cstats4a.alive() == 2 |
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cstats4b = ConstructorStats.get(m.MyObject4b) |
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assert cstats4b.alive() == 1 |
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del o |
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assert cstats4a.alive() == 1 # Should now only be one leftover |
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assert cstats4b.alive() == 0 # Should be deleted |
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m.MyObject4a.cleanup_all_instances() |
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assert cstats4a.alive() == 0 |
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assert cstats4b.alive() == 0 |
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def test_large_holder(): |
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o = m.MyObject5(5) |
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assert o.value == 5 |
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cstats = ConstructorStats.get(m.MyObject5) |
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assert cstats.alive() == 1 |
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del o |
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assert cstats.alive() == 0 |
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def test_shared_ptr_and_references(): |
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s = m.SharedPtrRef() |
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stats = ConstructorStats.get(m.A) |
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assert stats.alive() == 2 |
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ref = s.ref # init_holder_helper(holder_ptr=false, owned=false) |
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assert stats.alive() == 2 |
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assert s.set_ref(ref) |
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with pytest.raises(RuntimeError) as excinfo: |
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assert s.set_holder(ref) |
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assert "Unable to cast from non-held to held instance" in str(excinfo.value) |
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copy = s.copy # init_holder_helper(holder_ptr=false, owned=true) |
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assert stats.alive() == 3 |
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assert s.set_ref(copy) |
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assert s.set_holder(copy) |
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holder_ref = s.holder_ref # init_holder_helper(holder_ptr=true, owned=false) |
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assert stats.alive() == 3 |
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assert s.set_ref(holder_ref) |
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assert s.set_holder(holder_ref) |
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holder_copy = s.holder_copy # init_holder_helper(holder_ptr=true, owned=true) |
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assert stats.alive() == 3 |
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assert s.set_ref(holder_copy) |
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assert s.set_holder(holder_copy) |
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del ref, copy, holder_ref, holder_copy, s |
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assert stats.alive() == 0 |
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def test_shared_ptr_from_this_and_references(): |
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s = m.SharedFromThisRef() |
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stats = ConstructorStats.get(m.B) |
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assert stats.alive() == 2 |
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ref = s.ref # init_holder_helper(holder_ptr=false, owned=false, bad_wp=false) |
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assert stats.alive() == 2 |
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assert s.set_ref(ref) |
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assert s.set_holder( |
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ref |
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) # std::enable_shared_from_this can create a holder from a reference |
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bad_wp = s.bad_wp # init_holder_helper(holder_ptr=false, owned=false, bad_wp=true) |
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assert stats.alive() == 2 |
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assert s.set_ref(bad_wp) |
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with pytest.raises(RuntimeError) as excinfo: |
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assert s.set_holder(bad_wp) |
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assert "Unable to cast from non-held to held instance" in str(excinfo.value) |
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copy = s.copy # init_holder_helper(holder_ptr=false, owned=true, bad_wp=false) |
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assert stats.alive() == 3 |
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assert s.set_ref(copy) |
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assert s.set_holder(copy) |
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holder_ref = ( |
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s.holder_ref |
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) # init_holder_helper(holder_ptr=true, owned=false, bad_wp=false) |
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assert stats.alive() == 3 |
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assert s.set_ref(holder_ref) |
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assert s.set_holder(holder_ref) |
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holder_copy = ( |
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s.holder_copy |
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) # init_holder_helper(holder_ptr=true, owned=true, bad_wp=false) |
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assert stats.alive() == 3 |
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assert s.set_ref(holder_copy) |
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assert s.set_holder(holder_copy) |
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del ref, bad_wp, copy, holder_ref, holder_copy, s |
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assert stats.alive() == 0 |
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z = m.SharedFromThisVirt.get() |
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y = m.SharedFromThisVirt.get() |
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assert y is z |
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def test_move_only_holder(): |
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a = m.TypeWithMoveOnlyHolder.make() |
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b = m.TypeWithMoveOnlyHolder.make_as_object() |
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stats = ConstructorStats.get(m.TypeWithMoveOnlyHolder) |
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assert stats.alive() == 2 |
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del b |
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assert stats.alive() == 1 |
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del a |
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assert stats.alive() == 0 |
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def test_holder_with_addressof_operator(): |
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# this test must not throw exception from c++ |
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a = m.TypeForHolderWithAddressOf.make() |
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a.print_object_1() |
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a.print_object_2() |
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a.print_object_3() |
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a.print_object_4() |
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stats = ConstructorStats.get(m.TypeForHolderWithAddressOf) |
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assert stats.alive() == 1 |
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np = m.TypeForHolderWithAddressOf.make() |
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assert stats.alive() == 2 |
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del a |
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assert stats.alive() == 1 |
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del np |
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assert stats.alive() == 0 |
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b = m.TypeForHolderWithAddressOf.make() |
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c = b |
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assert b.get() is c.get() |
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assert stats.alive() == 1 |
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del b |
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assert stats.alive() == 1 |
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del c |
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assert stats.alive() == 0 |
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def test_move_only_holder_with_addressof_operator(): |
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a = m.TypeForMoveOnlyHolderWithAddressOf.make() |
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a.print_object() |
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stats = ConstructorStats.get(m.TypeForMoveOnlyHolderWithAddressOf) |
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assert stats.alive() == 1 |
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a.value = 42 |
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assert a.value == 42 |
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del a |
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assert stats.alive() == 0 |
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def test_smart_ptr_from_default(): |
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instance = m.HeldByDefaultHolder() |
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with pytest.raises(RuntimeError) as excinfo: |
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m.HeldByDefaultHolder.load_shared_ptr(instance) |
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assert ( |
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"Unable to load a custom holder type from a " |
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"default-holder instance" in str(excinfo.value) |
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) |
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def test_shared_ptr_gc(): |
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"""#187: issue involving std::shared_ptr<> return value policy & garbage collection""" |
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el = m.ElementList() |
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for i in range(10): |
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el.add(m.ElementA(i)) |
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pytest.gc_collect() |
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for i, v in enumerate(el.get()): |
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assert i == v.value()
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