Expose get_config() on ModelTesters (#12812)

* Expose get_config() on ModelTesters

* Typo

tests/test_modeling_marian.py

@@ -17,7 +17,7 @@
 import tempfile
 import unittest
 
-from transformers import is_torch_available
+from transformers import MarianConfig, is_torch_available
 from transformers.file_utils import cached_property
 from transformers.hf_api import HfApi
 from transformers.testing_utils import require_sentencepiece, require_tokenizers, require_torch, slow, torch_device
@@ -34,7 +34,6 @@ if is_torch_available():
         AutoConfig,
         AutoModelWithLMHead,
         AutoTokenizer,
-        MarianConfig,
         MarianModel,
         MarianMTModel,
         TranslationPipeline,
@@ -83,7 +82,6 @@ def prepare_marian_inputs_dict(
     }
 
 
-@require_torch
 class MarianModelTester:
     def __init__(
         self,
@@ -126,7 +124,6 @@ class MarianModelTester:
         self.decoder_start_token_id = decoder_start_token_id
 
     def prepare_config_and_inputs(self):
-        input_ids = ids_tensor([self.batch_size, self.seq_length], self.vocab_size)
         input_ids = ids_tensor([self.batch_size, self.seq_length], self.vocab_size).clamp(
             3,
         )
@@ -134,7 +131,12 @@ class MarianModelTester:
 
         decoder_input_ids = ids_tensor([self.batch_size, self.seq_length], self.vocab_size)
 
-        config = MarianConfig(
+        config = self.get_config()
+        inputs_dict = prepare_marian_inputs_dict(config, input_ids, decoder_input_ids)
+        return config, inputs_dict
+
+    def get_config(self):
+        return MarianConfig(
             vocab_size=self.vocab_size,
             d_model=self.hidden_size,
             encoder_layers=self.num_hidden_layers,
@@ -151,8 +153,6 @@ class MarianModelTester:
             pad_token_id=self.pad_token_id,
             decoder_start_token_id=self.decoder_start_token_id,
         )
-        inputs_dict = prepare_marian_inputs_dict(config, input_ids, decoder_input_ids)
-        return config, inputs_dict
 
     def prepare_config_and_inputs_for_common(self):
         config, inputs_dict = self.prepare_config_and_inputs()