add tests to ensure we're loading modules via service loader

Author: timfel

graalpython/com.oracle.graal.python.test/src/tests/test_pickle.py

@@ -66,5 +66,12 @@ def test_teeiterator(self):
         assert [16,17,18,19] == [next(teeit2) for i in range(1, 5)]
         assert [16,17,18,19] == [next(teeit) for i in range(1, 5)]
 
+    def test_is_builtin_on_enterprise(self):
+        import sys
+        if sys.implementation.name == "graalpy" and __graalpython__.is_managed_launcher():
+            import _pickle
+            assert "built-in" in repr(_pickle)
+
+
 if __name__ == '__main__':
     unittest.main()

graalpython/com.oracle.graal.python.test/src/tests/test_struct.py

@@ -269,3 +269,11 @@ def test_pack_varargs():
     except TypeError:
         raised = True
     assert raised
+
+
+def test_struct_is_builtin_on_enterprise():
+    if sys.implementation.name == "graalpy" and __graalpython__.is_managed_launcher():
+        # none of these should fail
+        import __graalpython_enterprise__
+        import _struct
+        assert "built-in" in repr(_struct)