TST: test the use of a custom meson.py script

Author: rgommers

tests/packages/vendored-meson/meson.build

@@ -0,0 +1,11 @@
+# SPDX-FileCopyrightText: 2023 The meson-python developers
+#
+# SPDX-License-Identifier: MIT
+
+project('vendored-meson', version: '1.0.0')
+
+py = import('python').find_installation()
+
+if not get_option('custom-meson-used')
+    error('Expected option "custom-meson-used" was not specified')
+endif

tests/packages/vendored-meson/meson_options.txt

@@ -0,0 +1,5 @@
+# SPDX-FileCopyrightText: 2023 The meson-python developers
+#
+# SPDX-License-Identifier: MIT
+
+option('custom-meson-used', type: 'boolean', value: false)

tests/packages/vendored-meson/pyproject.toml

@@ -0,0 +1,10 @@
+# SPDX-FileCopyrightText: 2023 The meson-python developers
+#
+# SPDX-License-Identifier: MIT
+
+[build-system]
+build-backend = 'mesonpy'
+requires = ['meson-python']
+
+[tool.meson-python]
+meson = 'third-party/meson.py'

tests/packages/vendored-meson/third-party/meson.py

@@ -0,0 +1,15 @@
+# SPDX-FileCopyrightText: 2023 The meson-python developers
+#
+# SPDX-License-Identifier: MIT
+
+import sys
+
+from mesonbuild import mesonmain
+
+
+if 'setup' in sys.argv:
+    sys.argv.append('-Dcustom-meson-used=true')
+
+
+if __name__ == '__main__':
+    sys.exit(mesonmain.main())

tests/test_wheel.py

@@ -334,3 +334,9 @@ def test_install_subdir(wheel_install_subdir):
             'nested/deep/deep.py',
             'nested/nested.py',
         }
+
+
+def test_vendored_meson(wheel_vendored_meson):
+    # This test will error if the vendored meson.py wrapper script in
+    # the test package isn't used.
+    pass