test_custom_4d_attention_mask skip with sliding window attn (#30833)

tests/test_modeling_common.py

@@ -4407,6 +4407,8 @@ class ModelTesterMixin:
             if not model_class._supports_static_cache:
                 self.skipTest(f"{model_class.__name__} is not guaranteed to work with custom 4D attention masks")
             config, _ = self.model_tester.prepare_config_and_inputs_for_common()
+            if getattr(config, "sliding_window", 0) > 0:
+                self.skipTest(f"{model_class.__name__} with sliding window attention is not supported by this test")
             model = model_class(config).to(device=torch_device, dtype=torch.float32)
 
             (