Expose get_config() on ModelTesters (#12812)

* Expose get_config() on ModelTesters

* Typo

tests/test_modeling_fsmt.py

@@ -19,7 +19,7 @@ import unittest
 import timeout_decorator  # noqa
 
 from parameterized import parameterized
-from transformers import is_torch_available
+from transformers import FSMTConfig, is_torch_available
 from transformers.file_utils import cached_property
 from transformers.testing_utils import require_sentencepiece, require_tokenizers, require_torch, slow, torch_device
 
@@ -32,7 +32,7 @@ if is_torch_available():
     import torch
     from torch import nn
 
-    from transformers import FSMTConfig, FSMTForConditionalGeneration, FSMTModel, FSMTTokenizer
+    from transformers import FSMTForConditionalGeneration, FSMTModel, FSMTTokenizer
     from transformers.models.fsmt.modeling_fsmt import (
         SinusoidalPositionalEmbedding,
         _prepare_fsmt_decoder_inputs,
@@ -42,8 +42,7 @@ if is_torch_available():
     from transformers.pipelines import TranslationPipeline
 
 
-@require_torch
-class ModelTester:
+class FSMTModelTester:
     def __init__(
         self,
         parent,
@@ -78,7 +77,12 @@ class ModelTester:
         )
         input_ids[:, -1] = 2  # Eos Token
 
-        config = FSMTConfig(
+        config = self.get_config()
+        inputs_dict = prepare_fsmt_inputs_dict(config, input_ids)
+        return config, inputs_dict
+
+    def get_config(self):
+        return FSMTConfig(
             vocab_size=self.src_vocab_size,  # hack needed for common tests
             src_vocab_size=self.src_vocab_size,
             tgt_vocab_size=self.tgt_vocab_size,
@@ -97,8 +101,6 @@ class ModelTester:
             bos_token_id=self.bos_token_id,
             pad_token_id=self.pad_token_id,
         )
-        inputs_dict = prepare_fsmt_inputs_dict(config, input_ids)
-        return config, inputs_dict
 
     def prepare_config_and_inputs_for_common(self):
         config, inputs_dict = self.prepare_config_and_inputs()
@@ -141,7 +143,7 @@ class FSMTModelTest(ModelTesterMixin, GenerationTesterMixin, unittest.TestCase):
     test_missing_keys = False
 
     def setUp(self):
-        self.model_tester = ModelTester(self)
+        self.model_tester = FSMTModelTester(self)
         self.langs = ["en", "ru"]
         config = {
             "langs": self.langs,