add fast test

tests/models/transformers/test_models_transformer_flux.py

@@ -18,6 +18,8 @@
 import torch
 
 from diffusers import FluxTransformer2DModel
+from diffusers.models.attention_processor import FluxIPAdapterJointAttnProcessor2_0
+from diffusers.models.embeddings import ImageProjection
 from diffusers.utils.testing_utils import enable_full_determinism, torch_device
 
 from ..test_modeling_common import ModelTesterMixin
@@ -26,6 +28,56 @@
 enable_full_determinism()
 
 
+def create_flux_ip_adapter_state_dict(model):
+    # "ip_adapter" (cross-attention weights)
+    ip_cross_attn_state_dict = {}
+    key_id = 0
+
+    for name in model.attn_processors.keys():
+        if name.startswith("single_transformer_blocks"):
+            continue
+
+        joint_attention_dim = model.config["joint_attention_dim"]
+        hidden_size = model.config["num_attention_heads"] * model.config["attention_head_dim"]
+        sd = FluxIPAdapterJointAttnProcessor2_0(
+            hidden_size=hidden_size, cross_attention_dim=joint_attention_dim, scale=1.0
+        ).state_dict()
+        ip_cross_attn_state_dict.update(
+            {
+                f"{key_id}.to_k_ip.weight": sd["to_k_ip.0.weight"],
+                f"{key_id}.to_v_ip.weight": sd["to_v_ip.0.weight"],
+                f"{key_id}.to_k_ip.bias": sd["to_k_ip.0.bias"],
+                f"{key_id}.to_v_ip.bias": sd["to_v_ip.0.bias"],
+            }
+        )
+
+        key_id += 1
+
+    # "image_proj" (ImageProjection layer weights)
+
+    image_projection = ImageProjection(
+        cross_attention_dim=model.config["joint_attention_dim"],
+        image_embed_dim=model.config["pooled_projection_dim"],
+        num_image_text_embeds=4,
+    )
+
+    ip_image_projection_state_dict = {}
+    sd = image_projection.state_dict()
+    ip_image_projection_state_dict.update(
+        {
+            "proj.weight": sd["image_embeds.weight"],
+            "proj.bias": sd["image_embeds.bias"],
+            "norm.weight": sd["norm.weight"],
+            "norm.bias": sd["norm.bias"],
+        }
+    )
+
+    del sd
+    ip_state_dict = {}
+    ip_state_dict.update({"image_proj": ip_image_projection_state_dict, "ip_adapter": ip_cross_attn_state_dict})
+    return ip_state_dict
+
+
 class FluxTransformerTests(ModelTesterMixin, unittest.TestCase):
     model_class = FluxTransformer2DModel
     main_input_name = "hidden_states"

tests/pipelines/flux/test_pipeline_flux.py

@@ -16,13 +16,14 @@
 )
 
 from ..test_pipelines_common import (
+    FluxIPAdapterTesterMixin,
     PipelineTesterMixin,
     check_qkv_fusion_matches_attn_procs_length,
     check_qkv_fusion_processors_exist,
 )
 
 
-class FluxPipelineFastTests(unittest.TestCase, PipelineTesterMixin):
+class FluxPipelineFastTests(unittest.TestCase, PipelineTesterMixin, FluxIPAdapterTesterMixin):
     pipeline_class = FluxPipeline
     params = frozenset(["prompt", "height", "width", "guidance_scale", "prompt_embeds", "pooled_prompt_embeds"])
     batch_params = frozenset(["prompt"])

tests/pipelines/test_pipelines_common.py

@@ -54,6 +54,7 @@
     get_autoencoder_tiny_config,
     get_consistency_vae_config,
 )
+from ..models.transformers.test_models_transformer_flux import create_flux_ip_adapter_state_dict
 from ..models.unets.test_models_unet_2d_condition import (
     create_ip_adapter_faceid_state_dict,
     create_ip_adapter_state_dict,
@@ -483,6 +484,94 @@ def test_ip_adapter_faceid(self, expected_max_diff: float = 1e-4):
         )
 
 
+class FluxIPAdapterTesterMixin:
+    """
+    This mixin is designed to be used with PipelineTesterMixin and unittest.TestCase classes.
+    It provides a set of common tests for pipelines that support IP Adapters.
+    """
+
+    def test_pipeline_signature(self):
+        parameters = inspect.signature(self.pipeline_class.__call__).parameters
+
+        assert issubclass(self.pipeline_class, FluxIPAdapterTesterMixin)
+        self.assertIn(
+            "ip_adapter_image",
+            parameters,
+            "`ip_adapter_image` argument must be supported by the `__call__` method",
+        )
+        self.assertIn(
+            "ip_adapter_image_embeds",
+            parameters,
+            "`ip_adapter_image_embeds` argument must be supported by the `__call__` method",
+        )
+
+    def _get_dummy_image_embeds(self, image_embed_dim: int = 768):
+        return torch.randn((1, 1, image_embed_dim), device=torch_device)
+
+    def _modify_inputs_for_ip_adapter_test(self, inputs: Dict[str, Any]):
+        inputs["negative_prompt"] = ""
+        inputs["true_cfg_scale"] = 4.0
+        inputs["output_type"] = "np"
+        inputs["return_dict"] = False
+        return inputs
+
+    def test_ip_adapter(self, expected_max_diff: float = 1e-4, expected_pipe_slice=None):
+        r"""Tests for IP-Adapter.
+
+        The following scenarios are tested:
+          - Single IP-Adapter with scale=0 should produce same output as no IP-Adapter.
+          - Single IP-Adapter with scale!=0 should produce different output compared to no IP-Adapter.
+        """
+        # Raising the tolerance for this test when it's run on a CPU because we
+        # compare against static slices and that can be shaky (with a VVVV low probability).
+        expected_max_diff = 9e-4 if torch_device == "cpu" else expected_max_diff
+
+        components = self.get_dummy_components()
+        pipe = self.pipeline_class(**components).to(torch_device)
+        pipe.set_progress_bar_config(disable=None)
+        image_embed_dim = pipe.transformer.config.pooled_projection_dim
+
+        # forward pass without ip adapter
+        inputs = self._modify_inputs_for_ip_adapter_test(self.get_dummy_inputs(torch_device))
+        if expected_pipe_slice is None:
+            output_without_adapter = pipe(**inputs)[0]
+        else:
+            output_without_adapter = expected_pipe_slice
+
+        adapter_state_dict = create_flux_ip_adapter_state_dict(pipe.transformer)
+        pipe.transformer._load_ip_adapter_weights(adapter_state_dict)
+
+        # forward pass with single ip adapter, but scale=0 which should have no effect
+        inputs = self._modify_inputs_for_ip_adapter_test(self.get_dummy_inputs(torch_device))
+        inputs["ip_adapter_image_embeds"] = [self._get_dummy_image_embeds(image_embed_dim)]
+        inputs["negative_ip_adapter_image_embeds"] = [self._get_dummy_image_embeds(image_embed_dim)]
+        pipe.set_ip_adapter_scale(0.0)
+        output_without_adapter_scale = pipe(**inputs)[0]
+        if expected_pipe_slice is not None:
+            output_without_adapter_scale = output_without_adapter_scale[0, -3:, -3:, -1].flatten()
+
+        # forward pass with single ip adapter, but with scale of adapter weights
+        inputs = self._modify_inputs_for_ip_adapter_test(self.get_dummy_inputs(torch_device))
+        inputs["ip_adapter_image_embeds"] = [self._get_dummy_image_embeds(image_embed_dim)]
+        inputs["negative_ip_adapter_image_embeds"] = [self._get_dummy_image_embeds(image_embed_dim)]
+        pipe.set_ip_adapter_scale(42.0)
+        output_with_adapter_scale = pipe(**inputs)[0]
+        if expected_pipe_slice is not None:
+            output_with_adapter_scale = output_with_adapter_scale[0, -3:, -3:, -1].flatten()
+
+        max_diff_without_adapter_scale = np.abs(output_without_adapter_scale - output_without_adapter).max()
+        max_diff_with_adapter_scale = np.abs(output_with_adapter_scale - output_without_adapter).max()
+
+        self.assertLess(
+            max_diff_without_adapter_scale,
+            expected_max_diff,
+            "Output without ip-adapter must be same as normal inference",
+        )
+        self.assertGreater(
+            max_diff_with_adapter_scale, 1e-2, "Output with ip-adapter must be different from normal inference"
+        )
+
+
 class PipelineLatentTesterMixin:
     """
     This mixin is designed to be used with PipelineTesterMixin and unittest.TestCase classes.