Python: add load test to limited API test

Based on the example in GH issue #13167, the limited API test has been
extended with a test to load the compiled module to ensure it can be
loaded correctly.

test cases/python/9 extmodule limited api/limited.c

@@ -6,12 +6,22 @@
 #error Wrong value for Py_LIMITED_API
 #endif
 
+static PyObject *
+hello(PyObject * Py_UNUSED(self), PyObject * Py_UNUSED(args)) {
+    return PyUnicode_FromString("hello world");
+}
+
+static struct PyMethodDef methods[] = {
+    { "hello", hello, METH_NOARGS, NULL },
+    { NULL, NULL, 0, NULL },
+};
+
 static struct PyModuleDef limited_module = {
    PyModuleDef_HEAD_INIT,
-   "limited_api_test",
+   "limited",
    NULL,
    -1,
-   NULL
+   methods
 };
 
 PyMODINIT_FUNC PyInit_limited(void) {

test cases/python/9 extmodule limited api/meson.build

@@ -14,3 +14,10 @@ ext_mod = py.extension_module('not_limited',
   'not_limited.c',
   install: true,
 )
+
+test('load-test',
+  py,
+  args: [files('test_limited.py')],
+  env: { 'PYTHONPATH': meson.current_build_dir() },
+  workdir: meson.current_source_dir()
+)

test cases/python/9 extmodule limited api/test_limited.py

@@ -0,0 +1,6 @@
+from limited import hello
+
+def test_hello():
+    assert hello() == "hello world"
+
+test_hello()