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6493f496e3
* `#error BYE_BYE_GOLDEN_SNAKE` * Removing everything related to 2.7 from ci.yml * Commenting-out Centos7 * Removing `PYTHON: 27` from .appveyor.yml * "PY2" removal, mainly from tests. C++ code is not touched. * Systematic removal of `u` prefix from `u"..."` and `u'...'` literals. Collateral cleanup of a couple minor other things. * Cleaning up around case-insensitive hits for `[^a-z]py.*2` in tests/. * Removing obsolete Python 2 mention in compiling.rst * Proper `#error` for Python 2. * Using PY_VERSION_HEX to guard `#error "PYTHON 2 IS NO LONGER SUPPORTED.` * chore: bump pre-commit * style: run pre-commit for pyupgrade 3+ * tests: use sys.version_info, not PY * chore: more Python 2 removal * Uncommenting Centos7 block (PR #3691 showed that it is working again). * Update pre-commit hooks * Fix pre-commit hook * refactor: remove Python 2 from CMake * refactor: remove Python 2 from setup code * refactor: simplify, better static typing * feat: fail with nice messages * refactor: drop Python 2 C++ code * docs: cleanup for Python 3 * revert: intree revert: intree * docs: minor touchup to py2 statement Co-authored-by: Henry Schreiner <henryschreineriii@gmail.com> Co-authored-by: Aaron Gokaslan <skylion.aaron@gmail.com>
126 lines
4.5 KiB
Python
126 lines
4.5 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 "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 "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 = (
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cstats["MoveOnlyInt"],
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cstats["MoveOrCopyInt"],
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cstats["CopyOnlyInt"],
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)
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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 = (
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cstats["MoveOnlyInt"],
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cstats["MoveOrCopyInt"],
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cstats["CopyOnlyInt"],
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)
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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 = (
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cstats["MoveOnlyInt"],
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cstats["MoveOrCopyInt"],
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cstats["CopyOnlyInt"],
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)
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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 "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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m1 = m.get_moveissue1(1)
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assert m1.value == 1
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m2 = m.get_moveissue2(2)
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assert m2.value == 2
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