Skip tests properly (#31308)

* Skip tests properly

* [test_all]

* Add 'reason' as kwarg for skipTest

* [test_all] Fix up

* [test_all]

tests/models/perceiver/test_modeling_perceiver.py

@@ -387,7 +387,7 @@ class PerceiverModelTest(ModelTesterMixin, PipelineTesterMixin, unittest.TestCas
 
     def test_training(self):
         if not self.model_tester.is_training:
-            return
+            self.skipTest(reason="model_tester.is_training is set to False")
 
         for model_class in self.all_model_classes:
             if model_class.__name__ in [
@@ -732,7 +732,7 @@ class PerceiverModelTest(ModelTesterMixin, PipelineTesterMixin, unittest.TestCas
 
     def test_correct_missing_keys(self):
         if not self.test_missing_keys:
-            return
+            self.skipTest(reason="test_missing_keys is set to False")
         config, _ = self.model_tester.prepare_config_and_inputs_for_common()
 
         for model_class in self.all_model_classes:

tests/models/perceiver/test_tokenization_perceiver.py

@@ -270,15 +270,16 @@ class PerceiverTokenizationTest(TokenizerTesterMixin, unittest.TestCase):
         tokenizer = self.perceiver_tokenizer
         self.assertEqual(tokenizer.decode([178]), "<EFBFBD>")
 
-    # tokenizer does not have vocabulary
+    @unittest.skip(reason="tokenizer does not have vocabulary")
     def test_get_vocab(self):
         pass
 
-    # inputs cannot be pretokenized since ids depend on whole input string and not just on single characters
+    @unittest.skip(reason="inputs cannot be pretokenized")
     def test_pretokenized_inputs(self):
+        # inputs cannot be pretokenized since ids depend on whole input string and not just on single characters
         pass
 
-    # tests all ids in vocab => vocab doesn't exist so unnecessary to test
+    @unittest.skip(reason="vocab does not exist")
     def test_conversion_reversible(self):
         pass