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transformers/tests/models/emu3/test_processing_emu3.py

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+# Copyright 2024 The HuggingFace Inc. team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Testing suite for the PyTorch emu3 model."""
+
+import tempfile
+import unittest
+
+import numpy as np
+
+from transformers import Emu3Processor, GPT2TokenizerFast
+from transformers.utils import is_vision_available
+
+from ...test_processing_common import ProcessorTesterMixin
+
+
+if is_vision_available():
+    from transformers import Emu3ImageProcessor
+
+
+class Emu3ProcessorTest(ProcessorTesterMixin, unittest.TestCase):
+    processor_class = Emu3Processor
+
+    @classmethod
+    def setUpClass(cls):
+        cls.tmpdirname = tempfile.mkdtemp()
+        image_processor = Emu3ImageProcessor(min_pixels=28 * 28, max_pixels=56 * 56)
+        extra_special_tokens = {
+            "image_token": "<image>",
+            "boi_token": "<|image start|>",
+            "eoi_token": "<|image end|>",
+            "image_wrapper_token": "<|image token|>",
+            "eof_token": "<|extra_201|>",
+        }
+        tokenizer = GPT2TokenizerFast.from_pretrained(
+            "openai-community/gpt2", extra_special_tokens=extra_special_tokens
+        )
+        tokenizer.pad_token_id = 0
+        tokenizer.sep_token_id = 1
+        processor = cls.processor_class(
+            image_processor=image_processor, tokenizer=tokenizer, chat_template="dummy_template"
+        )
+        processor.save_pretrained(cls.tmpdirname)
+        cls.image_token = processor.image_token
+
+    @staticmethod
+    def prepare_processor_dict():
+        return {
+            "chat_template": "{% for message in messages %}{% if message['role'] != 'system' %}{{ message['role'].upper() + ': '}}{% endif %}{# Render all images first #}{% for content in message['content'] | selectattr('type', 'equalto', 'image') %}{{ '<image>' }}{% endfor %}{# Render all text next #}{% if message['role'] != 'assistant' %}{% for content in message['content'] | selectattr('type', 'equalto', 'text') %}{{ content['text'] + ' '}}{% endfor %}{% else %}{% for content in message['content'] | selectattr('type', 'equalto', 'text') %}{% generation %}{{ content['text'] + ' '}}{% endgeneration %}{% endfor %}{% endif %}{% endfor %}{% if add_generation_prompt %}{{ 'ASSISTANT:' }}{% endif %}",
+        }  # fmt: skip
+
+    def test_processor_for_generation(self):
+        processor_components = self.prepare_components()
+        processor = self.processor_class(**processor_components)
+
+        # we don't need an image as input because the model will generate one
+        input_str = "lower newer"
+        image_input = self.prepare_image_inputs()
+        inputs = processor(text=input_str, return_for_image_generation=True, return_tensors="pt")
+        self.assertListEqual(list(inputs.keys()), ["input_ids", "attention_mask", "image_sizes"])
+        self.assertEqual(inputs[self.text_input_name].shape[-1], 8)
+
+        # when `return_for_image_generation` is set, we raise an error that image should not be provided
+        with self.assertRaises(ValueError):
+            inputs = processor(
+                text=input_str, images=image_input, return_for_image_generation=True, return_tensors="pt"
+            )
+
+    def test_processor_postprocess(self):
+        processor_components = self.prepare_components()
+        processor = self.processor_class(**processor_components)
+
+        input_str = "lower newer"
+        orig_image_input = self.prepare_image_inputs()
+        orig_image = np.array(orig_image_input).transpose(2, 0, 1)
+
+        inputs = processor(text=input_str, images=orig_image, do_resize=False, return_tensors="np")
+        normalized_image_input = inputs.pixel_values
+        unnormalized_images = processor.postprocess(normalized_image_input, return_tensors="np")["pixel_values"]
+
+        # For an image where pixels go from 0 to 255 the diff can be 1 due to some numerical precision errors when scaling and unscaling
+        self.assertTrue(np.abs(orig_image - unnormalized_images).max() >= 1)
+
+    # Copied from tests.models.llava.test_processing_llava.LlavaProcessorTest.test_get_num_vision_tokens
+    def test_get_num_vision_tokens(self):
+        "Tests general functionality of the helper used internally in vLLM"
+
+        processor = self.get_processor()
+
+        output = processor._get_num_multimodal_tokens(image_sizes=[(100, 100), (300, 100), (500, 30)])
+        self.assertTrue("num_image_tokens" in output)
+        self.assertEqual(len(output["num_image_tokens"]), 3)
+
+        self.assertTrue("num_image_patches" in output)
+        self.assertEqual(len(output["num_image_patches"]), 3)