gh-144957: Add test for lazy imports with __getattr__

Adds regression test to verify lazy imports work correctly with
modules that use __getattr__ for dynamic attributes (e.g. typing.Match).

The issue appears to be already fixed in current main branch.

Author: gourijain029-del

Lib/test/test_import/data/lazy_imports/module_with_getattr.py

@@ -0,0 +1,7 @@
+"""Test module with __getattr__ for gh-144957."""
+
+def __getattr__(name):
+    """Provide dynamic attributes."""
+    if name == "dynamic_attr":
+        return "from_getattr"
+    raise AttributeError(f"module has no attribute {name!r}")

Lib/test/test_import/test_lazy_imports.py

@@ -85,6 +85,23 @@ def test_basic_used(self):
         import test.test_import.data.lazy_imports.basic_used
         self.assertIn("test.test_import.data.lazy_imports.basic2", sys.modules)
 
+    def test_lazy_import_with_getattr(self):
+        """Lazy imports work with module __getattr__ (gh-144957)."""
+        code = textwrap.dedent("""
+            import sys
+            sys.set_lazy_imports("normal")
+            lazy from test.test_import.data.lazy_imports.module_with_getattr import dynamic_attr
+            assert dynamic_attr == "from_getattr"
+            print("OK")
+        """)
+        result = subprocess.run(
+            [sys.executable, "-c", code],
+            capture_output=True,
+            text=True
+        )
+        self.assertEqual(result.returncode, 0, result.stderr)
+        self.assertIn("OK", result.stdout)
+
 
 class GlobalLazyImportModeTests(unittest.TestCase):
     """Tests for sys.set_lazy_imports() global mode control."""