add initial design for uniform processors + align model (#31197)

* add initial design for uniform processors + align model

* fix mutable default 👀

* add configuration test

* handle structured kwargs w defaults + add test

* protect torch-specific test

* fix style

* fix

* fix assertEqual

* move kwargs merging to processing common

* rework kwargs for type hinting

* just get Unpack from extensions

* run-slow[align]

* handle kwargs passed as nested dict

* add from_pretrained test for nested kwargs handling

* [run-slow]align

* update documentation + imports

* update audio inputs

* protect audio types, silly

* try removing imports

* make things simpler

* simplerer

* move out kwargs test to common mixin

* [run-slow]align

* skip tests for old processors

* [run-slow]align, clip

* !$#@!! protect imports, darn it

* [run-slow]align, clip

* [run-slow]align, clip

* update doc

* improve documentation for default values

* add model_max_length testing

This parameter depends on tokenizers received.

* Raise if kwargs are specified in two places

* fix

* expand VideoInput

* fix

* fix style

* remove defaults values

* add comment to indicate documentation on adding kwargs

* protect imports

* [run-slow]align

* fix

* remove set() that breaks ordering

* test more

* removed unused func

* [run-slow]align

tests/models/align/test_processor_align.py

@@ -26,6 +26,8 @@ from transformers.models.bert.tokenization_bert import VOCAB_FILES_NAMES
 from transformers.testing_utils import require_vision
 from transformers.utils import IMAGE_PROCESSOR_NAME, is_vision_available
 
+from ...test_processing_common import ProcessorTesterMixin
+
 
 if is_vision_available():
     from PIL import Image
@@ -34,7 +36,9 @@ if is_vision_available():
 
 
 @require_vision
-class AlignProcessorTest(unittest.TestCase):
+class AlignProcessorTest(ProcessorTesterMixin, unittest.TestCase):
+    processor_class = AlignProcessor
+
     def setUp(self):
         self.tmpdirname = tempfile.mkdtemp()
 
@@ -159,7 +163,6 @@ class AlignProcessorTest(unittest.TestCase):
         encoded_processor = processor(text=input_str)
 
         encoded_tok = tokenizer(input_str, padding="max_length", max_length=64)
-
         for key in encoded_tok.keys():
             self.assertListEqual(encoded_tok[key], encoded_processor[key])