TST: add test package with internal shared library, installed in site-packages

Author: rgommers

tests/packages/sharedlib-in-package/meson.build

@@ -0,0 +1,9 @@
+# SPDX-FileCopyrightText: 2022 The meson-python developers
+#
+# SPDX-License-Identifier: MIT
+
+project('sharedlib-in-package', 'c', version: '1.0.0')
+
+py = import('python').find_installation(pure: false)
+
+subdir('mypkg')

tests/packages/sharedlib-in-package/mypkg/__init__.py

@@ -0,0 +1,22 @@
+# SPDX-FileCopyrightText: 2024 The meson-python developers
+#
+# SPDX-License-Identifier: MIT
+
+def _load_sharedlib():
+    """Load the `example_lib.dll` shared library on Windows
+
+    This shared library is installed alongside this __init__.py file. Due to
+    lack of rpath support, Windows cannot find shared libraries installed
+    within wheels. So pre-load it.
+    """
+    if os.name == "nt":
+        from ctypes import WinDLL
+        basedir = os.path.dirname(__file__)
+        dll_path = os.path.join(basedir, "example_lib.dll")
+        WinDLL(dll_path)
+
+
+_load_sharedlib()
+
+
+from ._example import example_sum

tests/packages/sharedlib-in-package/mypkg/_examplemod.c

@@ -0,0 +1,37 @@
+// SPDX-FileCopyrightText: 2022 The meson-python developers
+//
+// SPDX-License-Identifier: MIT
+
+#include <Python.h>
+
+#include "examplelib.h"
+
+static PyObject* example_sum(PyObject* self, PyObject *args)
+{
+    int a, b;
+    if (!PyArg_ParseTuple(args, "ii", &a, &b)) {
+        return NULL;
+    }
+
+    long result = sum(a, b);
+
+    return PyLong_FromLong(result);
+}
+
+static PyMethodDef methods[] = {
+    {"example_sum", (PyCFunction)example_sum, METH_VARARGS, NULL},
+    {NULL, NULL, 0, NULL},
+};
+
+static struct PyModuleDef module = {
+    PyModuleDef_HEAD_INIT,
+    "_example",
+    NULL,
+    -1,
+    methods,
+};
+
+PyMODINIT_FUNC PyInit__example(void)
+{
+    return PyModule_Create(&module);
+}

tests/packages/sharedlib-in-package/mypkg/examplelib.c

@@ -0,0 +1,7 @@
+// SPDX-FileCopyrightText: 2022 The meson-python developers
+//
+// SPDX-License-Identifier: MIT
+
+int sum(int a, int b) {
+	return a + b;
+}

tests/packages/sharedlib-in-package/mypkg/examplelib.h

@@ -0,0 +1,5 @@
+// SPDX-FileCopyrightText: 2022 The meson-python developers
+//
+// SPDX-License-Identifier: MIT
+
+int sum(int a, int b);

tests/packages/sharedlib-in-package/mypkg/meson.build

@@ -0,0 +1,24 @@
+# SPDX-FileCopyrightText: 2022 The meson-python developers
+#
+# SPDX-License-Identifier: MIT
+
+example_lib = shared_library(
+    'examplelib',
+    'examplelib.c',
+    install: true,
+    install_dir: py.get_install_dir() / 'mypkg',
+)
+
+py.extension_module(
+    '_example',
+    '_examplemod.c',
+    link_with: example_lib,
+    install: true,
+    subdir: 'mypkg',
+    install_rpath: '$ORIGIN',
+)
+
+py.install_sources(
+    ['__init__.py'],
+    subdir: 'mypkg',
+)

tests/packages/sharedlib-in-package/pyproject.toml

@@ -0,0 +1,7 @@
+# SPDX-FileCopyrightText: 2022 The meson-python developers
+#
+# SPDX-License-Identifier: MIT
+
+[build-system]
+build-backend = 'mesonpy'
+requires = ['meson-python']

tests/test_wheel.py

@@ -161,6 +161,12 @@ def test_local_lib(venv, wheel_link_against_local_lib):
     assert int(output) == 3
 
 
+def test_sharedlib_in_package(venv, wheel_sharedlib_in_package):
+    venv.pip('install', wheel_sharedlib_in_package)
+    output = venv.python('-c', 'import mypkg; print(mypkg.example_sum(2, 5))')
+    assert int(output) == 7
+
+
 @pytest.mark.skipif(sys.platform not in {'linux', 'darwin'}, reason='Not supported on this platform')
 def test_rpath(wheel_link_against_local_lib, tmp_path):
     artifact = wheel.wheelfile.WheelFile(wheel_link_against_local_lib)