Expose get_config() on ModelTesters (#12812)

* Expose get_config() on ModelTesters

* Typo

tests/test_modeling_luke.py

@@ -13,10 +13,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 """ Testing suite for the PyTorch LUKE model. """
-
 import unittest
 
-from transformers import is_torch_available
+from transformers import LukeConfig, is_torch_available
 from transformers.testing_utils import require_torch, slow, torch_device
 
 from .test_configuration_common import ConfigTester
@@ -27,7 +26,6 @@ if is_torch_available():
     import torch
 
     from transformers import (
-        LukeConfig,
         LukeForEntityClassification,
         LukeForEntityPairClassification,
         LukeForEntitySpanClassification,
@@ -154,7 +152,25 @@ class LukeModelTester:
                 [self.batch_size, self.entity_length], self.num_entity_span_classification_labels
             )
 
-        config = LukeConfig(
+        config = self.get_config()
+
+        return (
+            config,
+            input_ids,
+            attention_mask,
+            token_type_ids,
+            entity_ids,
+            entity_attention_mask,
+            entity_token_type_ids,
+            entity_position_ids,
+            sequence_labels,
+            entity_classification_labels,
+            entity_pair_classification_labels,
+            entity_span_classification_labels,
+        )
+
+    def get_config(self):
+        return LukeConfig(
             vocab_size=self.vocab_size,
             entity_vocab_size=self.entity_vocab_size,
             entity_emb_size=self.entity_emb_size,
@@ -172,21 +188,6 @@ class LukeModelTester:
             use_entity_aware_attention=self.use_entity_aware_attention,
         )
 
-        return (
-            config,
-            input_ids,
-            attention_mask,
-            token_type_ids,
-            entity_ids,
-            entity_attention_mask,
-            entity_token_type_ids,
-            entity_position_ids,
-            sequence_labels,
-            entity_classification_labels,
-            entity_pair_classification_labels,
-            entity_span_classification_labels,
-        )
-
     def create_and_check_model(
         self,
         config,