Adds missing module_specs for usages of _LazyModule (#15230)

* Add missing __spec__ for transformers.models.auto

* Moves the __spec__-test to the UnitTest class

* Adds module_spec to all instances of _LazyModule

* Refactors an old test from pytest to unittest

src/transformers/models/tapas/__init__.py

@@ -76,4 +76,4 @@ if TYPE_CHECKING:
 else:
     import sys
 
-    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure)
+    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

src/transformers/models/transfo_xl/__init__.py

@@ -78,4 +78,4 @@ if TYPE_CHECKING:
 else:
     import sys
 
-    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure)
+    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

src/transformers/models/trocr/__init__.py

@@ -47,4 +47,4 @@ if TYPE_CHECKING:
 else:
     import sys
 
-    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure)
+    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

src/transformers/models/unispeech/__init__.py

@@ -50,4 +50,4 @@ if TYPE_CHECKING:
 else:
     import sys
 
-    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure)
+    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

src/transformers/models/unispeech_sat/__init__.py

@@ -54,4 +54,4 @@ if TYPE_CHECKING:
 else:
     import sys
 
-    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure)
+    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

src/transformers/models/vision_encoder_decoder/__init__.py

@@ -49,4 +49,4 @@ if TYPE_CHECKING:
 else:
     import sys
 
-    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure)
+    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

src/transformers/models/visual_bert/__init__.py

@@ -58,4 +58,4 @@ if TYPE_CHECKING:
 else:
     import sys
 
-    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure)
+    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

src/transformers/models/vit/__init__.py

@@ -73,4 +73,4 @@ if TYPE_CHECKING:
 else:
     import sys
 
-    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure)
+    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

src/transformers/models/vit_mae/__init__.py

@@ -50,4 +50,4 @@ if TYPE_CHECKING:
 else:
     import sys
 
-    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure)
+    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

src/transformers/models/wav2vec2/__init__.py

@@ -97,4 +97,4 @@ if TYPE_CHECKING:
 else:
     import sys
 
-    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure)
+    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

src/transformers/models/wav2vec2_phoneme/__init__.py

@@ -32,4 +32,4 @@ if TYPE_CHECKING:
 else:
     import sys
 
-    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure)
+    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

src/transformers/models/wav2vec2_with_lm/__init__.py

@@ -32,4 +32,4 @@ if TYPE_CHECKING:
 else:
     import sys
 
-    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure)
+    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

src/transformers/models/wavlm/__init__.py

@@ -52,4 +52,4 @@ if TYPE_CHECKING:
 else:
     import sys
 
-    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure)
+    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

src/transformers/models/xlm/__init__.py

@@ -86,4 +86,4 @@ if TYPE_CHECKING:
 else:
     import sys
 
-    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure)
+    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

src/transformers/models/xlm_prophetnet/__init__.py

@@ -60,4 +60,4 @@ if TYPE_CHECKING:
 else:
     import sys
 
-    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure)
+    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

src/transformers/models/xlm_roberta/__init__.py

@@ -104,4 +104,4 @@ if TYPE_CHECKING:
 else:
     import sys
 
-    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure)
+    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

src/transformers/models/xlnet/__init__.py

@@ -104,4 +104,4 @@ if TYPE_CHECKING:
 else:
     import sys
 
-    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure)
+    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

src/transformers/onnx/__init__.py

@@ -47,4 +47,4 @@ if TYPE_CHECKING:
 else:
     import sys
 
-    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure)
+    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

templates/adding_a_new_model/cookiecutter-template-{{cookiecutter.modelname}}/__init__.py

@@ -210,4 +210,4 @@ if TYPE_CHECKING:
 else:
     import sys
 
-    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure)
+    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

tests/test_configuration_auto.py

@@ -13,10 +13,12 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import importlib
 import os
 import tempfile
 import unittest
 
+import transformers.models.auto
 from transformers.models.auto.configuration_auto import CONFIG_MAPPING, AutoConfig
 from transformers.models.bert.configuration_bert import BertConfig
 from transformers.models.roberta.configuration_roberta import RobertaConfig
@@ -31,6 +33,10 @@ class NewModelConfig(BertConfig):
 
 
 class AutoConfigTest(unittest.TestCase):
+    def test_module_spec(self):
+        self.assertIsNotNone(transformers.models.auto.__spec__)
+        self.assertIsNotNone(importlib.util.find_spec("transformers.models.auto"))
+
     def test_config_from_model_shortcut(self):
         config = AutoConfig.from_pretrained("bert-base-uncased")
         self.assertIsInstance(config, BertConfig)