Page MenuHomec4science
Files F92794787

test_local_bindings.py
No OneTemporary
Actions

File Metadata

Created
Sat, Nov 23, 18:54

test_local_bindings.py
View Options

import pytest
from pybind11_tests import local_bindings as m
def test_load_external():
"""Load a `py::module_local` type that's only registered in an external module"""
import pybind11_cross_module_tests as cm
assert m.load_external1(cm.ExternalType1(11)) == 11
assert m.load_external2(cm.ExternalType2(22)) == 22
with pytest.raises(TypeError) as excinfo:
assert m.load_external2(cm.ExternalType1(21)) == 21
assert "incompatible function arguments" in str(excinfo.value)
with pytest.raises(TypeError) as excinfo:
assert m.load_external1(cm.ExternalType2(12)) == 12
assert "incompatible function arguments" in str(excinfo.value)
def test_local_bindings():
"""Tests that duplicate `py::module_local` class bindings work across modules"""
# Make sure we can load the second module with the conflicting (but local) definition:
import pybind11_cross_module_tests as cm
i1 = m.LocalType(5)
assert i1.get() == 4
assert i1.get3() == 8
i2 = cm.LocalType(10)
assert i2.get() == 11
assert i2.get2() == 12
assert not hasattr(i1, 'get2')
assert not hasattr(i2, 'get3')
# Loading within the local module
assert m.local_value(i1) == 5
assert cm.local_value(i2) == 10
# Cross-module loading works as well (on failure, the type loader looks for
# external module-local converters):
assert m.local_value(i2) == 10
assert cm.local_value(i1) == 5
def test_nonlocal_failure():
"""Tests that attempting to register a non-local type in multiple modules fails"""
import pybind11_cross_module_tests as cm
with pytest.raises(RuntimeError) as excinfo:
cm.register_nonlocal()
assert str(excinfo.value) == 'generic_type: type "NonLocalType" is already registered!'
def test_duplicate_local():
"""Tests expected failure when registering a class twice with py::local in the same module"""
with pytest.raises(RuntimeError) as excinfo:
m.register_local_external()
import pybind11_tests
assert str(excinfo.value) == (
'generic_type: type "LocalExternal" is already registered!'
if hasattr(pybind11_tests, 'class_') else 'test_class not enabled')
def test_stl_bind_local():
import pybind11_cross_module_tests as cm
v1, v2 = m.LocalVec(), cm.LocalVec()
v1.append(m.LocalType(1))
v1.append(m.LocalType(2))
v2.append(cm.LocalType(1))
v2.append(cm.LocalType(2))
# Cross module value loading:
v1.append(cm.LocalType(3))
v2.append(m.LocalType(3))
assert [i.get() for i in v1] == [0, 1, 2]
assert [i.get() for i in v2] == [2, 3, 4]
v3, v4 = m.NonLocalVec(), cm.NonLocalVec2()
v3.append(m.NonLocalType(1))
v3.append(m.NonLocalType(2))
v4.append(m.NonLocal2(3))
v4.append(m.NonLocal2(4))
assert [i.get() for i in v3] == [1, 2]
assert [i.get() for i in v4] == [13, 14]
d1, d2 = m.LocalMap(), cm.LocalMap()
d1["a"] = v1[0]
d1["b"] = v1[1]
d2["c"] = v2[0]
d2["d"] = v2[1]
assert {i: d1[i].get() for i in d1} == {'a': 0, 'b': 1}
assert {i: d2[i].get() for i in d2} == {'c': 2, 'd': 3}
def test_stl_bind_global():
import pybind11_cross_module_tests as cm
with pytest.raises(RuntimeError) as excinfo:
cm.register_nonlocal_map()
assert str(excinfo.value) == 'generic_type: type "NonLocalMap" is already registered!'
with pytest.raises(RuntimeError) as excinfo:
cm.register_nonlocal_vec()
assert str(excinfo.value) == 'generic_type: type "NonLocalVec" is already registered!'
with pytest.raises(RuntimeError) as excinfo:
cm.register_nonlocal_map2()
assert str(excinfo.value) == 'generic_type: type "NonLocalMap2" is already registered!'
def test_mixed_local_global():
"""Local types take precedence over globally registered types: a module with a `module_local`
type can be registered even if the type is already registered globally. With the module,
casting will go to the local type; outside the module casting goes to the global type."""
import pybind11_cross_module_tests as cm
m.register_mixed_global()
m.register_mixed_local()
a = []
a.append(m.MixedGlobalLocal(1))
a.append(m.MixedLocalGlobal(2))
a.append(m.get_mixed_gl(3))
a.append(m.get_mixed_lg(4))
assert [x.get() for x in a] == [101, 1002, 103, 1004]
cm.register_mixed_global_local()
cm.register_mixed_local_global()
a.append(m.MixedGlobalLocal(5))
a.append(m.MixedLocalGlobal(6))
a.append(cm.MixedGlobalLocal(7))
a.append(cm.MixedLocalGlobal(8))
a.append(m.get_mixed_gl(9))
a.append(m.get_mixed_lg(10))
a.append(cm.get_mixed_gl(11))
a.append(cm.get_mixed_lg(12))
assert [x.get() for x in a] == \
[101, 1002, 103, 1004, 105, 1006, 207, 2008, 109, 1010, 211, 2012]
def test_internal_locals_differ():
"""Makes sure the internal local type map differs across the two modules"""
import pybind11_cross_module_tests as cm
assert m.local_cpp_types_addr() != cm.local_cpp_types_addr()
def test_stl_caster_vs_stl_bind(msg):
"""One module uses a generic vector caster from `<pybind11/stl.h>` while the other
exports `std::vector<int>` via `py:bind_vector` and `py::module_local`"""
import pybind11_cross_module_tests as cm
v1 = cm.VectorInt([1, 2, 3])
assert m.load_vector_via_caster(v1) == 6
assert cm.load_vector_via_binding(v1) == 6
v2 = [1, 2, 3]
assert m.load_vector_via_caster(v2) == 6
with pytest.raises(TypeError) as excinfo:
cm.load_vector_via_binding(v2) == 6
assert msg(excinfo.value) == """
load_vector_via_binding(): incompatible function arguments. The following argument types are supported:
1. (arg0: pybind11_cross_module_tests.VectorInt) -> int
Invoked with: [1, 2, 3]
""" # noqa: E501 line too long
def test_cross_module_calls():
import pybind11_cross_module_tests as cm
v1 = m.LocalVec()
v1.append(m.LocalType(1))
v2 = cm.LocalVec()
v2.append(cm.LocalType(2))
# Returning the self pointer should get picked up as returning an existing
# instance (even when that instance is of a foreign, non-local type).
assert m.return_self(v1) is v1
assert cm.return_self(v2) is v2
assert m.return_self(v2) is v2
assert cm.return_self(v1) is v1
assert m.LocalVec is not cm.LocalVec
# Returning a copy, on the other hand, always goes to the local type,
# regardless of where the source type came from.
assert type(m.return_copy(v1)) is m.LocalVec
assert type(m.return_copy(v2)) is m.LocalVec
assert type(cm.return_copy(v1)) is cm.LocalVec
assert type(cm.return_copy(v2)) is cm.LocalVec
# Test the example given in the documentation (which also tests inheritance casting):
mycat = m.Cat("Fluffy")
mydog = cm.Dog("Rover")
assert mycat.get_name() == "Fluffy"
assert mydog.name() == "Rover"
assert m.Cat.__base__.__name__ == "Pet"
assert cm.Dog.__base__.__name__ == "Pet"
assert m.Cat.__base__ is not cm.Dog.__base__
assert m.pet_name(mycat) == "Fluffy"
assert m.pet_name(mydog) == "Rover"
assert cm.pet_name(mycat) == "Fluffy"
assert cm.pet_name(mydog) == "Rover"
assert m.MixGL is not cm.MixGL
a = m.MixGL(1)
b = cm.MixGL(2)
assert m.get_gl_value(a) == 11
assert m.get_gl_value(b) == 12
assert cm.get_gl_value(a) == 101
assert cm.get_gl_value(b) == 102
c, d = m.MixGL2(3), cm.MixGL2(4)
with pytest.raises(TypeError) as excinfo:
m.get_gl_value(c)
assert "incompatible function arguments" in str(excinfo)
with pytest.raises(TypeError) as excinfo:
m.get_gl_value(d)
assert "incompatible function arguments" in str(excinfo)

Event Timeline

c4science · Help