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391c75447d
This udpates all the remaining tests to the new test suite code and comment styles started in #898. For the most part, the test coverage here is unchanged, with a few minor exceptions as noted below. - test_constants_and_functions: this adds more overload tests with overloads with different number of arguments for more comprehensive overload_cast testing. The test style conversion broke the overload tests under MSVC 2015, prompting the additional tests while looking for a workaround. - test_eigen: this dropped the unused functions `get_cm_corners` and `get_cm_corners_const`--these same tests were duplicates of the same things provided (and used) via ReturnTester methods. - test_opaque_types: this test had a hidden dependence on ExampleMandA which is now fixed by using the global UserType which suffices for the relevant test. - test_methods_and_attributes: this required some additions to UserType to make it usable as a replacement for the test's previous SimpleType: UserType gained a value mutator, and the `value` property is not mutable (it was previously readonly). Some overload tests were also added to better test overload_cast (as described above). - test_numpy_array: removed the untemplated mutate_data/mutate_data_t: the templated versions with an empty parameter pack expand to the same thing. - test_stl: this was already mostly in the new style; this just tweaks things a bit, localizing a class, and adding some missing `// test_whatever` comments. - test_virtual_functions: like `test_stl`, this was mostly in the new test style already, but needed some `// test_whatever` comments. This commit also moves the inherited virtual example code to the end of the file, after the main set of tests (since it is less important than the other tests, and rather length); it also got renamed to `test_inherited_virtuals` (from `test_inheriting_repeat`) because it tests both inherited virtual approaches, not just the repeat approach.
113 lines
4.4 KiB
Python
113 lines
4.4 KiB
Python
import pytest
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from pybind11_tests import copy_move_policies as m
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def test_lacking_copy_ctor():
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with pytest.raises(RuntimeError) as excinfo:
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m.lacking_copy_ctor.get_one()
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assert "the object is non-copyable!" in str(excinfo.value)
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def test_lacking_move_ctor():
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with pytest.raises(RuntimeError) as excinfo:
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m.lacking_move_ctor.get_one()
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assert "the object is neither movable nor copyable!" in str(excinfo.value)
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def test_move_and_copy_casts():
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"""Cast some values in C++ via custom type casters and count the number of moves/copies."""
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cstats = m.move_and_copy_cstats()
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c_m, c_mc, c_c = cstats["MoveOnlyInt"], cstats["MoveOrCopyInt"], cstats["CopyOnlyInt"]
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# The type move constructions/assignments below each get incremented: the move assignment comes
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# from the type_caster load; the move construction happens when extracting that via a cast or
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# loading into an argument.
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assert m.move_and_copy_casts(3) == 18
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assert c_m.copy_assignments + c_m.copy_constructions == 0
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assert c_m.move_assignments == 2
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assert c_m.move_constructions >= 2
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assert c_mc.alive() == 0
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assert c_mc.copy_assignments + c_mc.copy_constructions == 0
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assert c_mc.move_assignments == 2
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assert c_mc.move_constructions >= 2
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assert c_c.alive() == 0
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assert c_c.copy_assignments == 2
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assert c_c.copy_constructions >= 2
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assert c_m.alive() + c_mc.alive() + c_c.alive() == 0
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def test_move_and_copy_loads():
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"""Call some functions that load arguments via custom type casters and count the number of
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moves/copies."""
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cstats = m.move_and_copy_cstats()
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c_m, c_mc, c_c = cstats["MoveOnlyInt"], cstats["MoveOrCopyInt"], cstats["CopyOnlyInt"]
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assert m.move_only(10) == 10 # 1 move, c_m
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assert m.move_or_copy(11) == 11 # 1 move, c_mc
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assert m.copy_only(12) == 12 # 1 copy, c_c
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assert m.move_pair((13, 14)) == 27 # 1 c_m move, 1 c_mc move
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assert m.move_tuple((15, 16, 17)) == 48 # 2 c_m moves, 1 c_mc move
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assert m.copy_tuple((18, 19)) == 37 # 2 c_c copies
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# Direct constructions: 2 c_m moves, 2 c_mc moves, 1 c_c copy
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# Extra moves/copies when moving pairs/tuples: 3 c_m, 3 c_mc, 2 c_c
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assert m.move_copy_nested((1, ((2, 3, (4,)), 5))) == 15
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assert c_m.copy_assignments + c_m.copy_constructions == 0
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assert c_m.move_assignments == 6
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assert c_m.move_constructions == 9
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assert c_mc.copy_assignments + c_mc.copy_constructions == 0
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assert c_mc.move_assignments == 5
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assert c_mc.move_constructions == 8
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assert c_c.copy_assignments == 4
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assert c_c.copy_constructions == 6
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assert c_m.alive() + c_mc.alive() + c_c.alive() == 0
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@pytest.mark.skipif(not m.has_optional, reason='no <optional>')
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def test_move_and_copy_load_optional():
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"""Tests move/copy loads of std::optional arguments"""
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cstats = m.move_and_copy_cstats()
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c_m, c_mc, c_c = cstats["MoveOnlyInt"], cstats["MoveOrCopyInt"], cstats["CopyOnlyInt"]
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# The extra move/copy constructions below come from the std::optional move (which has to move
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# its arguments):
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assert m.move_optional(10) == 10 # c_m: 1 move assign, 2 move construct
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assert m.move_or_copy_optional(11) == 11 # c_mc: 1 move assign, 2 move construct
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assert m.copy_optional(12) == 12 # c_c: 1 copy assign, 2 copy construct
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# 1 move assign + move construct moves each of c_m, c_mc, 1 c_c copy
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# +1 move/copy construct each from moving the tuple
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# +1 move/copy construct each from moving the optional (which moves the tuple again)
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assert m.move_optional_tuple((3, 4, 5)) == 12
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assert c_m.copy_assignments + c_m.copy_constructions == 0
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assert c_m.move_assignments == 2
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assert c_m.move_constructions == 5
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assert c_mc.copy_assignments + c_mc.copy_constructions == 0
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assert c_mc.move_assignments == 2
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assert c_mc.move_constructions == 5
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assert c_c.copy_assignments == 2
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assert c_c.copy_constructions == 5
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assert c_m.alive() + c_mc.alive() + c_c.alive() == 0
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def test_private_op_new():
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"""An object with a private `operator new` cannot be returned by value"""
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with pytest.raises(RuntimeError) as excinfo:
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m.private_op_new_value()
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assert "the object is neither movable nor copyable" in str(excinfo.value)
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assert m.private_op_new_reference().value == 1
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def test_move_fallback():
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"""#389: rvp::move should fall-through to copy on non-movable objects"""
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m2 = m.get_moveissue2(2)
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assert m2.value == 2
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m1 = m.get_moveissue1(1)
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assert m1.value == 1
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