[docs] Add integration test example to copy pasta template (#5961)

Co-authored-by: Julien Chaumond <chaumond@gmail.com>

CONTRIBUTING.md

@@ -215,7 +215,7 @@ Follow these steps to start contributing:
      `RUN_SLOW=1 python -m pytest tests/test_my_new_model.py`. 
    - If you are adding a new tokenizer, write tests, and make sure 
      `RUN_SLOW=1 python -m pytest tests/test_tokenization_{your_model_name}.py` passes.
-   CircleCI does not run the slow tests. 
+   CircleCI does not run the slow tests, but github actions does every night!
 6. All public methods must have informative docstrings that work nicely with sphinx. See `modeling_ctrl.py` for an 
    example.
 
@@ -239,6 +239,16 @@ $ pip install -r examples/requirements.txt  # only needed the first time
 $ python -m pytest -n auto --dist=loadfile -s -v ./examples/
 ```
 
+and for the slow tests:
+
+```bash
+RUN_SLOW=yes python -m pytest -n auto --dist=loadfile -s -v ./tests/
+```
+or 
+```python
+RUN_SLOW=yes python -m pytest -n auto --dist=loadfile -s -v ./tests/
+```
+
 In fact, that's how `make test` and `make test-examples` are implemented!
 
 You can specify a smaller set of tests in order to test only the feature

examples/deebert/test_glue_deebert.py

@@ -5,6 +5,7 @@ import unittest
 from unittest.mock import patch
 
 import run_glue_deebert
+from transformers.testing_utils import slow
 
 
 logging.basicConfig(level=logging.DEBUG)
@@ -20,6 +21,7 @@ def get_setup_file():
 
 
 class DeeBertTests(unittest.TestCase):
+    @slow
     def test_glue_deebert(self):
         stream_handler = logging.StreamHandler(sys.stdout)
         logger.addHandler(stream_handler)

src/transformers/testing_utils.py

@@ -128,3 +128,11 @@ if _torch_available:
     torch_device = "cuda" if parse_flag_from_env("USE_CUDA") else "cpu"
 else:
     torch_device = None
+
+
+def require_torch_and_cuda(test_case):
+    """Decorator marking a test that requires CUDA and PyTorch). """
+    if torch_device != "cuda":
+        return unittest.skip("test requires CUDA")
+    else:
+        return test_case

templates/adding_a_new_example_script/README.md

 # How to add a new example script in 🤗Transformers
 
 This folder provide a template for adding a new example script implementing a training or inference task with the models in the  🤗Transformers library.
+Add tests!
 
-Currently only examples for PyTorch are provided which are adaptations of the library's SQuAD examples which implement single-GPU and distributed training with gradient accumulation and mixed-precision (using NVIDIA's apex library) to cover a reasonable range of use cases.
+
+These folder can be put in a subdirectory under your example's name, like `examples/deebert`.
+
+
+Best Practices: 
+- use `Trainer`/`TFTrainer`
+- write an @slow test that checks that your model can train on one batch and get a low loss.
+    - this test should use cuda if it's available. (e.g. by checking `transformers.torch_device`)
+- adding an `eval_xxx.py` script that can evaluate a pretrained checkpoint.  
+- tweet about your new example with a carbon screenshot of how to run it and tag @huggingface

templates/adding_a_new_model/README.md

@@ -18,6 +18,7 @@ Here an overview of the general workflow:
 - [ ] add model/configuration/tokenization classes
 - [ ] add conversion scripts
 - [ ] add tests
+- [ ] add @slow integration test
 - [ ] finalize
 
 Let's detail what should be done at each step

templates/adding_a_new_model/modeling_xxx.py

@@ -347,23 +347,7 @@ class XxxModel(XxxPreTrainedModel):
         if token_type_ids is None:
             token_type_ids = torch.zeros(input_shape, dtype=torch.long, device=device)
 
-        # We create a 3D attention mask from a 2D tensor mask.
-        # (this can be done with self.invert_attention_mask)
-        # Sizes are [batch_size, 1, 1, to_seq_length]
-        # So we can broadcast to [batch_size, num_heads, from_seq_length, to_seq_length]
-        # this attention mask is more simple than the triangular masking of causal attention
-        # used in OpenAI GPT, we just need to prepare the broadcast dimension here.
-
-        extended_attention_mask = attention_mask.unsqueeze(1).unsqueeze(2)
-
-        # Since attention_mask is 1.0 for positions we want to attend and 0.0 for
-        # masked positions, this operation will create a tensor which is 0.0 for
-        # positions we want to attend and -10000.0 for masked positions.
-        # Since we are adding it to the raw scores before the softmax, this is
-        # effectively the same as removing these entirely.
-        extended_attention_mask = extended_attention_mask.to(dtype=next(self.parameters()).dtype)  # fp16 compatibility
-        extended_attention_mask = (1.0 - extended_attention_mask) * -10000.0
-
+        extended_attention_mask = self.get_extended_attention_mask(attention_mask, input_shape, device)
         # Prepare head mask if needed
         # 1.0 in head_mask indicate we keep the head
         # attention_probs has shape bsz x n_heads x N x N

templates/adding_a_new_model/tests/test_modeling_xxx.py

@@ -20,7 +20,7 @@ from transformers import is_torch_available
 
 from .test_configuration_common import ConfigTester
 from .test_modeling_common import ModelTesterMixin, ids_tensor
-from .utils import CACHE_DIR, require_torch, slow, torch_device
+from .utils import require_torch, require_torch_and_cuda, slow, torch_device
 
 
 if is_torch_available():
@@ -31,8 +31,207 @@ if is_torch_available():
         XxxForQuestionAnswering,
         XxxForSequenceClassification,
         XxxForTokenClassification,
+        AutoModelForMaskedLM,
+        AutoTokenizer,
     )
-    from transformers.modeling_xxx import XXX_PRETRAINED_MODEL_ARCHIVE_LIST
+    from transformers.file_utils import cached_property
+
+    #
+
+
+class XxxModelTester:
+    """You can also import this e.g from .test_modeling_bart import BartModelTester """
+
+    def __init__(
+        self,
+        parent,
+        batch_size=13,
+        seq_length=7,
+        is_training=True,
+        use_input_mask=True,
+        use_token_type_ids=True,
+        use_labels=True,
+        vocab_size=99,
+        hidden_size=32,
+        num_hidden_layers=5,
+        num_attention_heads=4,
+        intermediate_size=37,
+        hidden_act="gelu",
+        hidden_dropout_prob=0.1,
+        attention_probs_dropout_prob=0.1,
+        max_position_embeddings=512,
+        type_vocab_size=16,
+        type_sequence_label_size=2,
+        initializer_range=0.02,
+        num_labels=3,
+        num_choices=4,
+        scope=None,
+    ):
+        self.parent = parent
+        self.batch_size = batch_size
+        self.seq_length = seq_length
+        self.is_training = is_training
+        self.use_input_mask = use_input_mask
+        self.use_token_type_ids = use_token_type_ids
+        self.use_labels = use_labels
+        self.vocab_size = vocab_size
+        self.hidden_size = hidden_size
+        self.num_hidden_layers = num_hidden_layers
+        self.num_attention_heads = num_attention_heads
+        self.intermediate_size = intermediate_size
+        self.hidden_act = hidden_act
+        self.hidden_dropout_prob = hidden_dropout_prob
+        self.attention_probs_dropout_prob = attention_probs_dropout_prob
+        self.max_position_embeddings = max_position_embeddings
+        self.type_vocab_size = type_vocab_size
+        self.type_sequence_label_size = type_sequence_label_size
+        self.initializer_range = initializer_range
+        self.num_labels = num_labels
+        self.num_choices = num_choices
+        self.scope = scope
+
+    def prepare_config_and_inputs(self):
+        input_ids = ids_tensor([self.batch_size, self.seq_length], self.vocab_size)
+
+        input_mask = None
+        if self.use_input_mask:
+            input_mask = ids_tensor([self.batch_size, self.seq_length], vocab_size=2)
+
+        token_type_ids = None
+        if self.use_token_type_ids:
+            token_type_ids = ids_tensor([self.batch_size, self.seq_length], self.type_vocab_size)
+
+        sequence_labels = None
+        token_labels = None
+        choice_labels = None
+        if self.use_labels:
+            sequence_labels = ids_tensor([self.batch_size], self.type_sequence_label_size)
+            token_labels = ids_tensor([self.batch_size, self.seq_length], self.num_labels)
+            choice_labels = ids_tensor([self.batch_size], self.num_choices)
+
+        config = XxxConfig(
+            vocab_size=self.vocab_size,
+            hidden_size=self.hidden_size,
+            num_hidden_layers=self.num_hidden_layers,
+            num_attention_heads=self.num_attention_heads,
+            intermediate_size=self.intermediate_size,
+            hidden_act=self.hidden_act,
+            hidden_dropout_prob=self.hidden_dropout_prob,
+            attention_probs_dropout_prob=self.attention_probs_dropout_prob,
+            max_position_embeddings=self.max_position_embeddings,
+            type_vocab_size=self.type_vocab_size,
+            initializer_range=self.initializer_range,
+        )
+
+        return config, input_ids, token_type_ids, input_mask, sequence_labels, token_labels, choice_labels
+
+    def check_loss_output(self, result):
+        self.parent.assertListEqual(list(result["loss"].size()), [])
+
+    def create_and_check_xxx_model(
+        self, config, input_ids, token_type_ids, input_mask, sequence_labels, token_labels, choice_labels
+    ):
+        model = XxxModel(config=config)
+        model.to(torch_device)
+        model.eval()
+        sequence_output, pooled_output = model(input_ids, attention_mask=input_mask, token_type_ids=token_type_ids)
+        sequence_output, pooled_output = model(input_ids, token_type_ids=token_type_ids)
+        sequence_output, pooled_output = model(input_ids)
+
+        result = {
+            "sequence_output": sequence_output,
+            "pooled_output": pooled_output,
+        }
+        self.parent.assertListEqual(
+            list(result["sequence_output"].size()), [self.batch_size, self.seq_length, self.hidden_size]
+        )
+        self.parent.assertListEqual(list(result["pooled_output"].size()), [self.batch_size, self.hidden_size])
+
+    def create_and_check_xxx_for_masked_lm(
+        self, config, input_ids, token_type_ids, input_mask, sequence_labels, token_labels, choice_labels
+    ):
+        model = XxxForMaskedLM(config=config)
+        model.to(torch_device)
+        model.eval()
+        loss, prediction_scores = model(
+            input_ids, attention_mask=input_mask, token_type_ids=token_type_ids, masked_lm_labels=token_labels
+        )
+        result = {
+            "loss": loss,
+            "prediction_scores": prediction_scores,
+        }
+        self.parent.assertListEqual(
+            list(result["prediction_scores"].size()), [self.batch_size, self.seq_length, self.vocab_size]
+        )
+        self.check_loss_output(result)
+
+    def create_and_check_xxx_for_question_answering(
+        self, config, input_ids, token_type_ids, input_mask, sequence_labels, token_labels, choice_labels
+    ):
+        model = XxxForQuestionAnswering(config=config)
+        model.to(torch_device)
+        model.eval()
+        loss, start_logits, end_logits = model(
+            input_ids,
+            attention_mask=input_mask,
+            token_type_ids=token_type_ids,
+            start_positions=sequence_labels,
+            end_positions=sequence_labels,
+        )
+        result = {
+            "loss": loss,
+            "start_logits": start_logits,
+            "end_logits": end_logits,
+        }
+        self.parent.assertListEqual(list(result["start_logits"].size()), [self.batch_size, self.seq_length])
+        self.parent.assertListEqual(list(result["end_logits"].size()), [self.batch_size, self.seq_length])
+        self.check_loss_output(result)
+
+    def create_and_check_xxx_for_sequence_classification(
+        self, config, input_ids, token_type_ids, input_mask, sequence_labels, token_labels, choice_labels
+    ):
+        config.num_labels = self.num_labels
+        model = XxxForSequenceClassification(config)
+        model.to(torch_device)
+        model.eval()
+        loss, logits = model(
+            input_ids, attention_mask=input_mask, token_type_ids=token_type_ids, labels=sequence_labels
+        )
+        result = {
+            "loss": loss,
+            "logits": logits,
+        }
+        self.parent.assertListEqual(list(result["logits"].size()), [self.batch_size, self.num_labels])
+        self.check_loss_output(result)
+
+    def create_and_check_xxx_for_token_classification(
+        self, config, input_ids, token_type_ids, input_mask, sequence_labels, token_labels, choice_labels
+    ):
+        config.num_labels = self.num_labels
+        model = XxxForTokenClassification(config=config)
+        model.to(torch_device)
+        model.eval()
+        loss, logits = model(input_ids, attention_mask=input_mask, token_type_ids=token_type_ids, labels=token_labels)
+        result = {
+            "loss": loss,
+            "logits": logits,
+        }
+        self.parent.assertListEqual(list(result["logits"].size()), [self.batch_size, self.seq_length, self.num_labels])
+        self.check_loss_output(result)
+
+    def prepare_config_and_inputs_for_common(self):
+        config_and_inputs = self.prepare_config_and_inputs()
+        (
+            config,
+            input_ids,
+            token_type_ids,
+            input_mask,
+            sequence_labels,
+            token_labels,
+            choice_labels,
+        ) = config_and_inputs
+        inputs_dict = {"input_ids": input_ids, "token_type_ids": token_type_ids, "attention_mask": input_mask}
+        return config, inputs_dict
 
 
 @require_torch
@@ -44,204 +243,8 @@ class XxxModelTest(ModelTesterMixin, unittest.TestCase):
         else ()
     )
 
-    class XxxModelTester(object):
-        def __init__(
-            self,
-            parent,
-            batch_size=13,
-            seq_length=7,
-            is_training=True,
-            use_input_mask=True,
-            use_token_type_ids=True,
-            use_labels=True,
-            vocab_size=99,
-            hidden_size=32,
-            num_hidden_layers=5,
-            num_attention_heads=4,
-            intermediate_size=37,
-            hidden_act="gelu",
-            hidden_dropout_prob=0.1,
-            attention_probs_dropout_prob=0.1,
-            max_position_embeddings=512,
-            type_vocab_size=16,
-            type_sequence_label_size=2,
-            initializer_range=0.02,
-            num_labels=3,
-            num_choices=4,
-            scope=None,
-        ):
-            self.parent = parent
-            self.batch_size = batch_size
-            self.seq_length = seq_length
-            self.is_training = is_training
-            self.use_input_mask = use_input_mask
-            self.use_token_type_ids = use_token_type_ids
-            self.use_labels = use_labels
-            self.vocab_size = vocab_size
-            self.hidden_size = hidden_size
-            self.num_hidden_layers = num_hidden_layers
-            self.num_attention_heads = num_attention_heads
-            self.intermediate_size = intermediate_size
-            self.hidden_act = hidden_act
-            self.hidden_dropout_prob = hidden_dropout_prob
-            self.attention_probs_dropout_prob = attention_probs_dropout_prob
-            self.max_position_embeddings = max_position_embeddings
-            self.type_vocab_size = type_vocab_size
-            self.type_sequence_label_size = type_sequence_label_size
-            self.initializer_range = initializer_range
-            self.num_labels = num_labels
-            self.num_choices = num_choices
-            self.scope = scope
-
-        def prepare_config_and_inputs(self):
-            input_ids = ids_tensor([self.batch_size, self.seq_length], self.vocab_size)
-
-            input_mask = None
-            if self.use_input_mask:
-                input_mask = ids_tensor([self.batch_size, self.seq_length], vocab_size=2)
-
-            token_type_ids = None
-            if self.use_token_type_ids:
-                token_type_ids = ids_tensor([self.batch_size, self.seq_length], self.type_vocab_size)
-
-            sequence_labels = None
-            token_labels = None
-            choice_labels = None
-            if self.use_labels:
-                sequence_labels = ids_tensor([self.batch_size], self.type_sequence_label_size)
-                token_labels = ids_tensor([self.batch_size, self.seq_length], self.num_labels)
-                choice_labels = ids_tensor([self.batch_size], self.num_choices)
-
-            config = XxxConfig(
-                vocab_size=self.vocab_size,
-                hidden_size=self.hidden_size,
-                num_hidden_layers=self.num_hidden_layers,
-                num_attention_heads=self.num_attention_heads,
-                intermediate_size=self.intermediate_size,
-                hidden_act=self.hidden_act,
-                hidden_dropout_prob=self.hidden_dropout_prob,
-                attention_probs_dropout_prob=self.attention_probs_dropout_prob,
-                max_position_embeddings=self.max_position_embeddings,
-                type_vocab_size=self.type_vocab_size,
-                initializer_range=self.initializer_range,
-            )
-
-            return config, input_ids, token_type_ids, input_mask, sequence_labels, token_labels, choice_labels
-
-        def check_loss_output(self, result):
-            self.parent.assertListEqual(list(result["loss"].size()), [])
-
-        def create_and_check_xxx_model(
-            self, config, input_ids, token_type_ids, input_mask, sequence_labels, token_labels, choice_labels
-        ):
-            model = XxxModel(config=config)
-            model.to(torch_device)
-            model.eval()
-            sequence_output, pooled_output = model(input_ids, attention_mask=input_mask, token_type_ids=token_type_ids)
-            sequence_output, pooled_output = model(input_ids, token_type_ids=token_type_ids)
-            sequence_output, pooled_output = model(input_ids)
-
-            result = {
-                "sequence_output": sequence_output,
-                "pooled_output": pooled_output,
-            }
-            self.parent.assertListEqual(
-                list(result["sequence_output"].size()), [self.batch_size, self.seq_length, self.hidden_size]
-            )
-            self.parent.assertListEqual(list(result["pooled_output"].size()), [self.batch_size, self.hidden_size])
-
-        def create_and_check_xxx_for_masked_lm(
-            self, config, input_ids, token_type_ids, input_mask, sequence_labels, token_labels, choice_labels
-        ):
-            model = XxxForMaskedLM(config=config)
-            model.to(torch_device)
-            model.eval()
-            loss, prediction_scores = model(
-                input_ids, attention_mask=input_mask, token_type_ids=token_type_ids, masked_lm_labels=token_labels
-            )
-            result = {
-                "loss": loss,
-                "prediction_scores": prediction_scores,
-            }
-            self.parent.assertListEqual(
-                list(result["prediction_scores"].size()), [self.batch_size, self.seq_length, self.vocab_size]
-            )
-            self.check_loss_output(result)
-
-        def create_and_check_xxx_for_question_answering(
-            self, config, input_ids, token_type_ids, input_mask, sequence_labels, token_labels, choice_labels
-        ):
-            model = XxxForQuestionAnswering(config=config)
-            model.to(torch_device)
-            model.eval()
-            loss, start_logits, end_logits = model(
-                input_ids,
-                attention_mask=input_mask,
-                token_type_ids=token_type_ids,
-                start_positions=sequence_labels,
-                end_positions=sequence_labels,
-            )
-            result = {
-                "loss": loss,
-                "start_logits": start_logits,
-                "end_logits": end_logits,
-            }
-            self.parent.assertListEqual(list(result["start_logits"].size()), [self.batch_size, self.seq_length])
-            self.parent.assertListEqual(list(result["end_logits"].size()), [self.batch_size, self.seq_length])
-            self.check_loss_output(result)
-
-        def create_and_check_xxx_for_sequence_classification(
-            self, config, input_ids, token_type_ids, input_mask, sequence_labels, token_labels, choice_labels
-        ):
-            config.num_labels = self.num_labels
-            model = XxxForSequenceClassification(config)
-            model.to(torch_device)
-            model.eval()
-            loss, logits = model(
-                input_ids, attention_mask=input_mask, token_type_ids=token_type_ids, labels=sequence_labels
-            )
-            result = {
-                "loss": loss,
-                "logits": logits,
-            }
-            self.parent.assertListEqual(list(result["logits"].size()), [self.batch_size, self.num_labels])
-            self.check_loss_output(result)
-
-        def create_and_check_xxx_for_token_classification(
-            self, config, input_ids, token_type_ids, input_mask, sequence_labels, token_labels, choice_labels
-        ):
-            config.num_labels = self.num_labels
-            model = XxxForTokenClassification(config=config)
-            model.to(torch_device)
-            model.eval()
-            loss, logits = model(
-                input_ids, attention_mask=input_mask, token_type_ids=token_type_ids, labels=token_labels
-            )
-            result = {
-                "loss": loss,
-                "logits": logits,
-            }
-            self.parent.assertListEqual(
-                list(result["logits"].size()), [self.batch_size, self.seq_length, self.num_labels]
-            )
-            self.check_loss_output(result)
-
-        def prepare_config_and_inputs_for_common(self):
-            config_and_inputs = self.prepare_config_and_inputs()
-            (
-                config,
-                input_ids,
-                token_type_ids,
-                input_mask,
-                sequence_labels,
-                token_labels,
-                choice_labels,
-            ) = config_and_inputs
-            inputs_dict = {"input_ids": input_ids, "token_type_ids": token_type_ids, "attention_mask": input_mask}
-            return config, inputs_dict
-
     def setUp(self):
-        self.model_tester = XxxModelTest.XxxModelTester(self)
+        self.model_tester = XxxModelTester(self)
         self.config_tester = ConfigTester(self, config_class=XxxConfig, hidden_size=37)
 
     def test_config(self):
@@ -268,7 +271,50 @@ class XxxModelTest(ModelTesterMixin, unittest.TestCase):
         self.model_tester.create_and_check_xxx_for_token_classification(*config_and_inputs)
 
     @slow
-    def test_model_from_pretrained(self):
-        for model_name in XXX_PRETRAINED_MODEL_ARCHIVE_LIST[:1]:
-            model = XxxModel.from_pretrained(model_name, cache_dir=CACHE_DIR)
-            self.assertIsNotNone(model)
+    def test_lm_outputs_same_as_reference_model(self):
+        """Write something that could help someone fixing this here."""
+        checkpoint_path = "XXX/bart-large"
+        model = self.big_model
+        tokenizer = AutoTokenizer.from_pretrained(
+            checkpoint_path
+        )  # same with AutoTokenizer (see tokenization_auto.py). This is not mandatory
+        # MODIFY THIS DEPENDING ON YOUR MODELS RELEVANT TASK.
+        batch = tokenizer(["I went to the <mask> yesterday"]).to(torch_device)
+        desired_mask_result = tokenizer.decode("store")  # update this
+        logits = model(**batch).logits
+        masked_index = (batch.input_ids == self.tokenizer.mask_token_id).nonzero()
+        assert model.num_parameters() == 175e9  # a joke
+        mask_entry_logits = logits[0, masked_index.item(), :]
+        probs = mask_entry_logits.softmax(dim=0)
+        _, predictions = probs.topk(1)
+        self.assertEqual(tokenizer.decode(predictions), desired_mask_result)
+
+    @cached_property
+    def big_model(self):
+        """Cached property means this code will only be executed once."""
+        checkpoint_path = "XXX/bart-large"
+        model = AutoModelForMaskedLM.from_pretrained(checkpoint_path).to(
+            torch_device
+        )  # test whether AutoModel can determine your model_class from checkpoint name
+        if torch_device == "cuda":
+            model.half()
+
+    # optional: do more testing! This will save you time later!
+    @slow
+    def test_that_XXX_can_be_used_in_a_pipeline(self):
+        """We can use self.big_model here without calling __init__ again."""
+        pass
+
+    def test_XXX_loss_doesnt_change_if_you_add_padding(self):
+        pass
+
+    def test_XXX_bad_args(self):
+        pass
+
+    def test_XXX_backward_pass_reduces_loss(self):
+        """Test loss/gradients same as reference implementation, for example."""
+        pass
+
+    @require_torch_and_cuda
+    def test_large_inputs_in_fp16_dont_cause_overflow(self):
+        pass

templates/adding_a_new_model/tests/test_tokenization_xxx.py

@@ -62,3 +62,7 @@ class XxxTokenizationTest(TokenizerTesterMixin, unittest.TestCase):
         tokens = tokenizer.tokenize("UNwant\u00E9d,running")
         self.assertListEqual(tokens, ["un", "##want", "##ed", ",", "runn", "##ing"])
         self.assertListEqual(tokenizer.convert_tokens_to_ids(tokens), [7, 4, 5, 10, 8, 9])
+
+    def test_special_tokens_as_you_expect(self):
+        """If you are training a seq2seq model that expects a decoder_prefix token make sure it is prepended to decoder_input_ids """
+        pass