[GenerationOutputs] Fix GenerationOutputs Tests (#9443)

* fix generation models

* fix led

* fix docs

* add is_decoder

* fix last docstrings

* make style

* fix t5 cross attentions

* correct t5

src/transformers/generation_utils.py

@@ -113,21 +113,20 @@ class SampleDecoderOnlyOutput(ModelOutput):
 
 
     Args:
-        sequences (:obj:`torch.LongTensor` of shape :obj:`(batch_size * num_return_sequences, sequence_length)`):
+        sequences (:obj:`torch.LongTensor` of shape :obj:`(batch_size*num_return_sequences, sequence_length)`):
             The generated sequences. The second dimension (sequence_length) is either equal to :obj:`max_length` or
             shorter if all batches finished early due to the :obj:`eos_token_id`.
         scores (:obj:`tuple(torch.FloatTensor)` `optional`, returned when ``output_scores=True`` is passed or when ``config.output_scores=True``):
             Processed prediction scores of the language modeling head (scores for each vocabulary token before SoftMax)
             at each generation step. :obj:`(max_length,)`-shaped tuple of :obj:`torch.FloatTensor` with each tensor of
-            shape :obj:`(batch_size * num_return_sequences, config.vocab_size)`).
+            shape :obj:`(batch_size*num_return_sequences, config.vocab_size)`).
         attentions (:obj:`tuple(tuple(torch.FloatTensor))`, `optional`, returned when ``output_attentions=True`` is passed or ``config.output_attentions=True``):
             Tuple (one element for each generated token) of tuples (one element for each layer of the decoder) of
-            :obj:`torch.FloatTensor` of shape :obj:`(num_return_sequences * batch_size, num_heads, generated_length,
+            :obj:`torch.FloatTensor` of shape :obj:`(num_return_sequences*batch_size, num_heads, generated_length,
             sequence_length)`.
         hidden_states (:obj:`tuple(tuple(torch.FloatTensor))`, `optional`, returned when ``output_hidden_states=True`` is passed or when ``config.output_hidden_states=True``):
             Tuple (one element for each generated token) of tuples (one element for each layer of the decoder) of
-            :obj:`torch.FloatTensor` of shape :obj:`(num_return_sequences * batch_size, generated_length,
-            hidden_size)`.
+            :obj:`torch.FloatTensor` of shape :obj:`(num_return_sequences*batch_size, generated_length, hidden_size)`.
     """
 
     sequences: torch.LongTensor = None
@@ -145,27 +144,26 @@ class SampleEncoderDecoderOutput(ModelOutput):
 
 
     Args:
-        sequences (:obj:`torch.LongTensor` of shape :obj:`(batch_size * num_return_sequences, sequence_length)`):
+        sequences (:obj:`torch.LongTensor` of shape :obj:`(batch_size*num_return_sequences, sequence_length)`):
             The generated sequences. The second dimension (sequence_length) is either equal to :obj:`max_length` or
             shorter if all batches finished early due to the :obj:`eos_token_id`.
         scores (:obj:`tuple(torch.FloatTensor)` `optional`, returned when ``output_scores=True`` is passed or when ``config.output_scores=True``):
             Processed prediction scores of the language modeling head (scores for each vocabulary token before SoftMax)
             at each generation step. :obj:`(max_length,)`-shaped tuple of :obj:`torch.FloatTensor` with each tensor of
-            shape :obj:`(batch_size * num_return_sequences, config.vocab_size)`).
+            shape :obj:`(batch_size*num_return_sequences, config.vocab_size)`).
         encoder_attentions (:obj:`tuple(torch.FloatTensor)`, `optional`, returned when ``output_attentions=True`` is passed or ``config.output_attentions=True``):
-            Tuple of :obj:`torch.FloatTensor` (one for each layer of the decoder) of shape :obj:`(batch_size *
-            num_return_sequences, num_heads, sequence_length, sequence_length)`.
+            Tuple of :obj:`torch.FloatTensor` (one for each layer of the decoder) of shape
+            :obj:`(batch_size*num_return_sequences, num_heads, sequence_length, sequence_length)`.
         encoder_hidden_states (:obj:`tuple(torch.FloatTensor)`, `optional`, returned when ``output_hidden_states=True`` is passed or when ``config.output_hidden_states=True``):
             Tuple of :obj:`torch.FloatTensor` (one for the output of the embeddings + one for the output of each layer)
-            of shape :obj:`(batch_size * num_return_sequences, sequence_length, hidden_size)`.
+            of shape :obj:`(batch_size*num_return_sequences, sequence_length, hidden_size)`.
         decoder_attentions (:obj:`tuple(tuple(torch.FloatTensor))`, `optional`, returned when ``output_attentions=True`` is passed or ``config.output_attentions=True``):
             Tuple (one element for each generated token) of tuples (one element for each layer of the decoder) of
-            :obj:`torch.FloatTensor` of shape :obj:`(batch_size * num_return_sequences, num_heads, generated_length,
+            :obj:`torch.FloatTensor` of shape :obj:`(batch_size*num_return_sequences, num_heads, generated_length,
             sequence_length)`.
         decoder_hidden_states (:obj:`tuple(tuple(torch.FloatTensor))`, `optional`, returned when ``output_hidden_states=True`` is passed or when ``config.output_hidden_states=True``):
             Tuple (one element for each generated token) of tuples (one element for each layer of the decoder) of
-            :obj:`torch.FloatTensor` of shape :obj:`(batch_size * num_return_sequences, generated_length,
-            hidden_size)`.
+            :obj:`torch.FloatTensor` of shape :obj:`(batch_size*num_return_sequences, generated_length, hidden_size)`.
     """
 
     sequences: torch.LongTensor = None
@@ -182,23 +180,23 @@ class BeamSearchDecoderOnlyOutput(ModelOutput):
     Base class for outputs of decoder-only generation models using beam search.
 
     Args:
-        sequences (:obj:`torch.LongTensor` of shape :obj:`(batch_size * num_return_sequences, sequence_length)`):
+        sequences (:obj:`torch.LongTensor` of shape :obj:`(batch_size*num_return_sequences, sequence_length)`):
             The generated sequences. The second dimension (sequence_length) is either equal to :obj:`max_length` or
             shorter if all batches finished early due to the :obj:`eos_token_id`.
-        sequences_scores (:obj:`torch.FloatTensor` of shape :obj:`(batch_size * num_return_sequences)`, `optional`, returned when ``output_scores=True`` is passed or when ``config.output_scores=True``):
+        sequences_scores (:obj:`torch.FloatTensor` of shape :obj:`(batch_size*num_return_sequences)`, `optional`, returned when ``output_scores=True`` is passed or when ``config.output_scores=True``):
             Final beam scores of the generated ``sequences``.
         scores (:obj:`tuple(torch.FloatTensor)` `optional`, returned when ``output_scores=True`` is passed or when ``config.output_scores=True``):
             Processed beam scores for each vocabulary token at each generation step. Beam scores consisting of log
             softmax scores for each vocabulary token and sum of log softmax of previously generated tokens in this beam
-            . :obj:`(max_length,)`-shaped tuple of :obj:`torch.FloatTensor` with each tensor of shape :obj:`(batch_size
-            * num_beams * num_return_sequences, config.vocab_size)`).
+            . :obj:`(max_length,)`-shaped tuple of :obj:`torch.FloatTensor` with each tensor of shape
+            :obj:`(batch_size*num_beams*num_return_sequences, config.vocab_size)`).
         attentions (:obj:`tuple(tuple(torch.FloatTensor))`, `optional`, returned when ``output_attentions=True`` is passed or ``config.output_attentions=True``):
             Tuple (one element for each generated token) of tuples (one element for each layer of the decoder) of
-            :obj:`torch.FloatTensor` of shape :obj:`(batch_size * num_beams, num_heads, generated_length,
+            :obj:`torch.FloatTensor` of shape :obj:`(batch_size*num_beams, num_heads, generated_length,
             sequence_length)`.
         hidden_states (:obj:`tuple(tuple(torch.FloatTensor))`, `optional`, returned when ``output_hidden_states=True`` is passed or when ``config.output_hidden_states=True``):
             Tuple (one element for each generated token) of tuples (one element for each layer of the decoder) of
-            :obj:`torch.FloatTensor` of shape :obj:`(batch_size * num_beams * num_return_sequences, generated_length,
+            :obj:`torch.FloatTensor` of shape :obj:`(batch_size*num_beams*num_return_sequences, generated_length,
             hidden_size)`.
     """
 
@@ -217,30 +215,30 @@ class BeamSearchEncoderDecoderOutput(ModelOutput):
     attributes (respectively the decoder_attentions and the decoder_hidden_states attributes)
 
     Args:
-        sequences (:obj:`torch.LongTensor` of shape :obj:`(batch_size * num_return_sequences, sequence_length)`):
+        sequences (:obj:`torch.LongTensor` of shape :obj:`(batch_size*num_return_sequences, sequence_length)`):
             The generated sequences. The second dimension (sequence_length) is either equal to :obj:`max_length` or
             shorter if all batches finished early due to the :obj:`eos_token_id`.
-        sequences_scores (:obj:`torch.FloatTensor` of shape :obj:`(batch_size * num_return_sequences)`, `optional`, returned when ``output_scores=True`` is passed or when ``config.output_scores=True``):
+        sequences_scores (:obj:`torch.FloatTensor` of shape :obj:`(batch_size*num_return_sequences)`, `optional`, returned when ``output_scores=True`` is passed or when ``config.output_scores=True``):
             Final beam scores of the generated ``sequences``.
         scores (:obj:`tuple(torch.FloatTensor)` `optional`, returned when ``output_scores=True`` is passed or when ``config.output_scores=True``):
             Processed beam scores for each vocabulary token at each generation step. Beam scores consisting of log
             softmax scores for each vocabulary token and sum of log softmax of previously generated tokens in this beam
-            . :obj:`(max_length,)`-shaped tuple of :obj:`torch.FloatTensor` with each tensor of shape :obj:`(batch_size
-            * num_beams, config.vocab_size)`).
+            . :obj:`(max_length,)`-shaped tuple of :obj:`torch.FloatTensor` with each tensor of shape
+            :obj:`(batch_size*num_beams, config.vocab_size)`).
         attentions (:obj:`tuple(tuple(torch.FloatTensor))`, `optional`, returned when ``output_attentions=True`` is passed or ``config.output_attentions=True``):
         encoder_attentions (:obj:`tuple(torch.FloatTensor)`, `optional`, returned when ``output_attentions=True`` is passed or ``config.output_attentions=True``):
             Tuple of :obj:`torch.FloatTensor` (one for each layer of the decoder) of shape :obj:`(batch_size,
             num_heads, sequence_length, sequence_length)`.
         encoder_hidden_states (:obj:`tuple(torch.FloatTensor)`, `optional`, returned when ``output_hidden_states=True`` is passed or when ``config.output_hidden_states=True``):
             Tuple of :obj:`torch.FloatTensor` (one for the output of the embeddings + one for the output of each layer)
-            of shape :obj:`(batch_size * num_beams * num_return_sequences, sequence_length, hidden_size)`.
+            of shape :obj:`(batch_size*num_beams*num_return_sequences, sequence_length, hidden_size)`.
         decoder_attentions (:obj:`tuple(tuple(torch.FloatTensor))`, `optional`, returned when ``output_attentions=True`` is passed or ``config.output_attentions=True``):
             Tuple (one element for each generated token) of tuples (one element for each layer of the decoder) of
-            :obj:`torch.FloatTensor` of shape :obj:`(batch_size * num_beams * num_return_sequences, num_heads,
+            :obj:`torch.FloatTensor` of shape :obj:`(batch_size*num_beams*num_return_sequences, num_heads,
             generated_length, sequence_length)`.
         decoder_hidden_states (:obj:`tuple(tuple(torch.FloatTensor))`, `optional`, returned when ``output_hidden_states=True`` is passed or when ``config.output_hidden_states=True``):
             Tuple (one element for each generated token) of tuples (one element for each layer of the decoder) of
-            :obj:`torch.FloatTensor` of shape :obj:`(batch_size * num_beams * num_return_sequences, generated_length,
+            :obj:`torch.FloatTensor` of shape :obj:`(batch_size*num_beams*num_return_sequences, generated_length,
             hidden_size)`.
     """
 
@@ -259,7 +257,7 @@ class BeamSampleDecoderOnlyOutput(ModelOutput):
     Base class for outputs of decoder-only generation models using beam sample.
 
     Args:
-        sequences (:obj:`torch.LongTensor` of shape :obj:`(batch_size * num_return_sequences, sequence_length)`):
+        sequences (:obj:`torch.LongTensor` of shape :obj:`(batch_size*num_return_sequences, sequence_length)`):
             The generated sequences. The second dimension (sequence_length) is either equal to :obj:`max_length` or
             shorter if all batches finished early due to the :obj:`eos_token_id`.
         sequences_scores (:obj:`torch.FloatTensor` of shape :obj:`(batch_size * num_return_sequence)`, `optional`, returned when ``output_scores=True`` is passed or when ``config.output_scores=True``):
@@ -267,15 +265,15 @@ class BeamSampleDecoderOnlyOutput(ModelOutput):
         scores (:obj:`tuple(torch.FloatTensor)` `optional`, returned when ``output_scores=True`` is passed or when ``config.output_scores=True``):
             Processed beam scores for each vocabulary token at each generation step. Beam scores consisting of log
             softmax scores for each vocabulary token and sum of log softmax of previously generated tokens in this beam
-            . :obj:`(max_length,)`-shaped tuple of :obj:`torch.FloatTensor` with each tensor of shape :obj:`(batch_size
-            * num_beams * num_return_sequences, config.vocab_size)`).
+            . :obj:`(max_length,)`-shaped tuple of :obj:`torch.FloatTensor` with each tensor of shape
+            :obj:`(batch_size*num_beams*num_return_sequences, config.vocab_size)`).
         attentions (:obj:`tuple(tuple(torch.FloatTensor))`, `optional`, returned when ``output_attentions=True`` is passed or ``config.output_attentions=True``):
             Tuple (one element for each generated token) of tuples (one element for each layer of the decoder) of
-            :obj:`torch.FloatTensor` of shape :obj:`(batch_size * num_beams, num_heads, generated_length,
+            :obj:`torch.FloatTensor` of shape :obj:`(batch_size*num_beams, num_heads, generated_length,
             sequence_length)`.
         hidden_states (:obj:`tuple(tuple(torch.FloatTensor))`, `optional`, returned when ``output_hidden_states=True`` is passed or when ``config.output_hidden_states=True``):
             Tuple (one element for each generated token) of tuples (one element for each layer of the decoder) of
-            :obj:`torch.FloatTensor` of shape :obj:`(batch_size * num_beams, generated_length, hidden_size)`.
+            :obj:`torch.FloatTensor` of shape :obj:`(batch_size*num_beams, generated_length, hidden_size)`.
     """
 
     sequences: torch.LongTensor = None
@@ -293,7 +291,7 @@ class BeamSampleEncoderDecoderOutput(ModelOutput):
     encoder_hidden_states attributes (respectively the decoder_attentions and the decoder_hidden_states attributes)
 
     Args:
-        sequences (:obj:`torch.LongTensor` of shape :obj:`(batch_size * num_beams, sequence_length)`):
+        sequences (:obj:`torch.LongTensor` of shape :obj:`(batch_size*num_beams, sequence_length)`):
             The generated sequences. The second dimension (sequence_length) is either equal to :obj:`max_length` or
             shorter if all batches finished early due to the :obj:`eos_token_id`.
         sequences_scores (:obj:`torch.FloatTensor` of shape :obj:`(batch_size * num_return_sequence)`, `optional`, returned when ``output_scores=True`` is passed or when ``config.output_scores=True``):
@@ -301,21 +299,21 @@ class BeamSampleEncoderDecoderOutput(ModelOutput):
         scores (:obj:`tuple(torch.FloatTensor)` `optional`, returned when ``output_scores=True`` is passed or when ``config.output_scores=True``):
             Processed beam scores for each vocabulary token at each generation step. Beam scores consisting of log
             softmax scores for each vocabulary token and sum of log softmax of previously generated tokens in this beam
-            . :obj:`(max_length,)`-shaped tuple of :obj:`torch.FloatTensor` with each tensor of shape :obj:`(batch_size
-            * num_beams, config.vocab_size)`).
+            . :obj:`(max_length,)`-shaped tuple of :obj:`torch.FloatTensor` with each tensor of shape
+            :obj:`(batch_size*num_beams, config.vocab_size)`).
         encoder_attentions (:obj:`tuple(torch.FloatTensor)`, `optional`, returned when ``output_attentions=True`` is passed or ``config.output_attentions=True``):
             Tuple of :obj:`torch.FloatTensor` (one for each layer of the decoder) of shape :obj:`(batch_size,
             num_heads, sequence_length, sequence_length)`.
         encoder_hidden_states (:obj:`tuple(torch.FloatTensor)`, `optional`, returned when ``output_hidden_states=True`` is passed or when ``config.output_hidden_states=True``):
             Tuple of :obj:`torch.FloatTensor` (one for the output of the embeddings + one for the output of each layer)
-            of shape :obj:`(batch_size * num_beams, sequence_length, hidden_size)`.
+            of shape :obj:`(batch_size*num_beams, sequence_length, hidden_size)`.
         decoder_attentions (:obj:`tuple(tuple(torch.FloatTensor))`, `optional`, returned when ``output_attentions=True`` is passed or ``config.output_attentions=True``):
             Tuple (one element for each generated token) of tuples (one element for each layer of the decoder) of
-            :obj:`torch.FloatTensor` of shape :obj:`(batch_size * num_beams, num_heads, generated_length,
+            :obj:`torch.FloatTensor` of shape :obj:`(batch_size*num_beams, num_heads, generated_length,
             sequence_length)`.
         decoder_hidden_states (:obj:`tuple(tuple(torch.FloatTensor))`, `optional`, returned when ``output_hidden_states=True`` is passed or when ``config.output_hidden_states=True``):
             Tuple (one element for each generated token) of tuples (one element for each layer of the decoder) of
-            :obj:`torch.FloatTensor` of shape :obj:`(batch_size * num_beams, generated_length, hidden_size)`.
+            :obj:`torch.FloatTensor` of shape :obj:`(batch_size*num_beams, generated_length, hidden_size)`.
     """
 
     sequences: torch.LongTensor = None

src/transformers/models/bert/modeling_bert.py

@@ -1227,7 +1227,7 @@ class BertLMHeadModel(BertPreTrainedModel):
         if past is not None:
             input_ids = input_ids[:, -1:]
 
-        return {"input_ids": input_ids, "attention_mask": attention_mask}
+        return {"input_ids": input_ids, "attention_mask": attention_mask, "past_key_values": past}
 
     def _reorder_cache(self, past, beam_idx):
         reordered_past = ()

src/transformers/models/bert_generation/modeling_bert_generation.py

@@ -570,7 +570,7 @@ class BertGenerationDecoder(BertGenerationPreTrainedModel):
         if past is not None:
             input_ids = input_ids[:, -1:]
 
-        return {"input_ids": input_ids, "attention_mask": attention_mask}
+        return {"input_ids": input_ids, "attention_mask": attention_mask, "past_key_values": past}
 
     def _reorder_cache(self, past, beam_idx):
         reordered_past = ()

src/transformers/models/encoder_decoder/modeling_encoder_decoder.py

@@ -455,7 +455,7 @@ class EncoderDecoderModel(PreTrainedModel):
             "decoder_attention_mask": decoder_attention_mask,
             "decoder_input_ids": decoder_inputs["input_ids"],
             "encoder_outputs": encoder_outputs,
-            "past_key_values": past,
+            "past_key_values": decoder_inputs["past_key_values"],
             "use_cache": use_cache,
         }
         return input_dict

src/transformers/models/roberta/modeling_roberta.py

@@ -962,7 +962,7 @@ class RobertaForCausalLM(RobertaPreTrainedModel):
         if past is not None:
             input_ids = input_ids[:, -1:]
 
-        return {"input_ids": input_ids, "attention_mask": attention_mask}
+        return {"input_ids": input_ids, "attention_mask": attention_mask, "past_key_values": past}
 
     def _reorder_cache(self, past, beam_idx):
         reordered_past = ()

src/transformers/models/t5/modeling_t5.py

@@ -1148,6 +1148,7 @@ class T5Model(T5PreTrainedModel):
         self.shared = nn.Embedding(config.vocab_size, config.d_model)
 
         encoder_config = copy.deepcopy(config)
+        encoder_config.is_decoder = False
         encoder_config.use_cache = False
         encoder_config.is_encoder_decoder = False
         self.encoder = T5Stack(encoder_config, self.shared)
@@ -1325,6 +1326,7 @@ class T5ForConditionalGeneration(T5PreTrainedModel):
         self.shared = nn.Embedding(config.vocab_size, config.d_model)
 
         encoder_config = copy.deepcopy(config)
+        encoder_config.is_decoder = False
         encoder_config.use_cache = False
         encoder_config.is_encoder_decoder = False
         self.encoder = T5Stack(encoder_config, self.shared)

templates/adding_a_new_model/cookiecutter-template-{{cookiecutter.modelname}}/modeling_{{cookiecutter.lowercase_modelname}}.py

@@ -1132,7 +1132,7 @@ class {{cookiecutter.camelcase_modelname}}ForCausalLM({{cookiecutter.camelcase_m
         if past is not None:
             input_ids = input_ids[:, -1:]
 
-        return {"input_ids": input_ids, "attention_mask": attention_mask}
+        return {"input_ids": input_ids, "attention_mask": attention_mask, "past_key_values": past}
 
     def _reorder_cache(self, past, beam_idx):
         reordered_past = ()

tests/test_generation_utils.py

@@ -522,6 +522,7 @@ class GenerationTesterMixin:
                 return
 
             config.use_cache = True
+            config.is_decoder = True
             model = model_class(config).to(torch_device).eval()
             output_greedy, output_generate = self._greedy_generate(
                 model=model,
@@ -730,6 +731,7 @@ class GenerationTesterMixin:
             beam_kwargs, beam_scorer = self._get_beam_scorer_and_kwargs(input_ids.shape[0], max_length)
 
             config.use_cache = True
+            config.is_decoder = True
             model = model_class(config).to(torch_device).eval()
             output_beam, output_generate = self._beam_search_generate(
                 model=model,
@@ -962,12 +964,7 @@ class GenerationTesterMixin:
         # Attentions
         if config.is_encoder_decoder:
             # encoder
-            encoder_expected_shape = (batch_size, config.num_attention_heads, seq_length, seq_length)
-            self.assertIsInstance(output.encoder_attentions, tuple)
-            self.assertListEqual(
-                [layer_attentions.shape for layer_attentions in output.encoder_attentions],
-                [encoder_expected_shape] * len(output.encoder_attentions),
-            )
+            self._check_encoder_attention_for_generate(output.encoder_attentions, batch_size, config, seq_length)
             # decoder
             self._check_attentions_for_generate(
                 num_sequences_in_output,
@@ -993,11 +990,8 @@ class GenerationTesterMixin:
         # Hidden States
         if config.is_encoder_decoder:
             # encoder
-            encoder_expected_shape = (batch_size, seq_length, config.hidden_size)
-            self.assertIsInstance(output.encoder_hidden_states, tuple)
-            self.assertListEqual(
-                [layer_hidden_states.shape for layer_hidden_states in output.encoder_hidden_states],
-                [encoder_expected_shape] * len(output.encoder_hidden_states),
+            self._check_encoder_hidden_states_for_generate(
+                output.encoder_hidden_states, batch_size, config, seq_length
             )
 
             # decoder
@@ -1052,6 +1046,14 @@ class GenerationTesterMixin:
                 [layer_attention.shape for layer_attention in iter_attentions], [expected_shape] * len(iter_attentions)
             )
 
+    def _check_encoder_attention_for_generate(self, attentions, batch_size, config, seq_length):
+        encoder_expected_shape = (batch_size, config.num_attention_heads, seq_length, seq_length)
+        self.assertIsInstance(attentions, tuple)
+        self.assertListEqual(
+            [layer_attentions.shape for layer_attentions in attentions],
+            [encoder_expected_shape] * len(attentions),
+        )
+
     def _check_hidden_states_for_generate(
         self, batch_size, hidden_states, min_length, max_length, config, use_cache=False, num_beam_groups=1
     ):
@@ -1071,6 +1073,14 @@ class GenerationTesterMixin:
                 [expected_shape] * len(iter_hidden_states),
             )
 
+    def _check_encoder_hidden_states_for_generate(self, hidden_states, batch_size, config, seq_length):
+        encoder_expected_shape = (batch_size, seq_length, config.hidden_size)
+        self.assertIsInstance(hidden_states, tuple)
+        self.assertListEqual(
+            [layer_hidden_states.shape for layer_hidden_states in hidden_states],
+            [encoder_expected_shape] * len(hidden_states),
+        )
+
 
 @require_torch
 class UtilsFunctionsTest(unittest.TestCase):

tests/test_modeling_led.py

@@ -327,6 +327,32 @@ class LEDModelTest(ModelTesterMixin, GenerationTesterMixin, unittest.TestCase):
         # longformer cannot keep gradients in attentions or hidden states
         return
 
+    def _check_encoder_attention_for_generate(self, attentions, batch_size, config, seq_length):
+        # make sure tgt_length is padded
+        tgt_length = (
+            seq_length // config.attention_window[0] + (seq_length % config.attention_window[0] != 0)
+        ) * config.attention_window[0]
+
+        encoder_expected_shape = (batch_size, config.num_attention_heads, tgt_length, seq_length)
+        self.assertIsInstance(attentions, tuple)
+        self.assertListEqual(
+            [layer_attentions.shape for layer_attentions in attentions],
+            [encoder_expected_shape] * len(attentions),
+        )
+
+    def _check_encoder_hidden_states_for_generate(self, hidden_states, batch_size, config, seq_length):
+        # make sure seq_length is padded
+        seq_length = (
+            seq_length // config.attention_window[0] + (seq_length % config.attention_window[0] != 0)
+        ) * config.attention_window[0]
+
+        encoder_expected_shape = (batch_size, seq_length, config.hidden_size)
+        self.assertIsInstance(hidden_states, tuple)
+        self.assertListEqual(
+            [layer_hidden_states.shape for layer_hidden_states in hidden_states],
+            [encoder_expected_shape] * len(hidden_states),
+        )
+
     def test_attention_outputs(self):
         config, inputs_dict = self.model_tester.prepare_config_and_inputs_for_common()
         config.return_dict = True