TST: extend local lib test to verify Windows support

Author: dnicolodi

tests/packages/link-against-local-lib/__init__.py

@@ -0,0 +1,10 @@
+import os
+
+_path = os.path.join(os.path.dirname(__file__), '..', '.example.meson-libs')
+if os.name == 'nt':
+    os.add_dll_directory(_path)
+elif sys.platform == 'cygwin':
+    os.environ['PATH'] = os.pathsep.join((os.environ['PATH'], _path))
+del _path
+
+from _example import *

tests/packages/link-against-local-lib/meson.build

@@ -8,10 +8,16 @@ subdir('lib')
 
 py = import('python').find_installation()
 
+py.install_sources(
+    '__init__.py',
+    subdir_name: 'example',
+)
+
 py.extension_module(
-    'example',
+    '_example',
     'examplemod.c',
     link_with: example_lib,
     link_args: ['-Wl,-rpath,custom-rpath'],
     install: true,
+    subdir_name: 'example',                 
 )

tests/packages/link-against-local-lib/pyproject.toml

@@ -5,3 +5,6 @@
 [build-system]
 build-backend = 'mesonpy'
 requires = ['meson-python']
+
+[tool.meson-python]
+allow-windows-internal-shared-libs = true

tests/test_wheel.py

@@ -172,7 +172,6 @@ def test_contents(package_library, wheel_library):
     }
 
 
-@pytest.mark.skipif(sys.platform not in {'linux', 'darwin', 'sunos5'}, reason='Not supported on this platform')
 def test_local_lib(venv, wheel_link_against_local_lib):
     venv.pip('install', wheel_link_against_local_lib)
     output = venv.python('-c', 'import example; print(example.example_sum(1, 2))')