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import pytest
def test_string_list():
from pybind11_tests import StringList, ClassWithSTLVecProperty, print_opaque_list
l = StringList()
l.push_back("Element 1")
l.push_back("Element 2")
assert 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 print_opaque_list(l) == "Opaque list: [Element 1]"
cvp = ClassWithSTLVecProperty()
assert print_opaque_list(cvp.stringList) == "Opaque list: []"
cvp.stringList = l
cvp.stringList.push_back("Element 3")
assert print_opaque_list(cvp.stringList) == "Opaque list: [Element 1, Element 3]"
def test_pointers(msg):
from pybind11_tests import (return_void_ptr, get_void_ptr_value, ExampleMandA,
print_opaque_list, return_null_str, get_null_str_value,
return_unique_ptr, ConstructorStats)
living_before = ConstructorStats.get(ExampleMandA).alive()
assert get_void_ptr_value(return_void_ptr()) == 0x1234
assert get_void_ptr_value(ExampleMandA()) # Should also work for other C++ types
assert ConstructorStats.get(ExampleMandA).alive() == living_before
with pytest.raises(TypeError) as excinfo:
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 return_null_str() is None
assert get_null_str_value(return_null_str()) is not None
ptr = return_unique_ptr()
assert "StringList" in repr(ptr)
assert print_opaque_list(ptr) == "Opaque list: [some value]"
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