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import pytest
from pybind11_tests import opaque_types as m
from pybind11_tests import ConstructorStats, UserType
def test_string_list():
l = m.StringList()
l.push_back("Element 1")
l.push_back("Element 2")
assert m.print_opaque_list(l) == "Opaque list: [Element 1, Element 2]"
assert l.back() == "Element 2"
for i, k in enumerate(l, start=1):
assert k == "Element {}".format(i)
l.pop_back()
assert m.print_opaque_list(l) == "Opaque list: [Element 1]"
cvp = m.ClassWithSTLVecProperty()
assert m.print_opaque_list(cvp.stringList) == "Opaque list: []"
cvp.stringList = l
cvp.stringList.push_back("Element 3")
assert m.print_opaque_list(cvp.stringList) == "Opaque list: [Element 1, Element 3]"
def test_pointers(msg):
living_before = ConstructorStats.get(UserType).alive()
assert m.get_void_ptr_value(m.return_void_ptr()) == 0x1234
assert m.get_void_ptr_value(UserType()) # Should also work for other C++ types
assert ConstructorStats.get(UserType).alive() == living_before
with pytest.raises(TypeError) as excinfo:
m.get_void_ptr_value([1, 2, 3]) # This should not work
assert msg(excinfo.value) == """
get_void_ptr_value(): incompatible function arguments. The following argument types are supported:
1. (arg0: capsule) -> int
Invoked with: [1, 2, 3]
""" # noqa: E501 line too long
assert m.return_null_str() is None
assert m.get_null_str_value(m.return_null_str()) is not None
ptr = m.return_unique_ptr()
assert "StringList" in repr(ptr)
assert m.print_opaque_list(ptr) == "Opaque list: [some value]"
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