[tests] Add fast test slices for HiDream-Image (#11953)

update

tests/pipelines/hidream_image/test_pipeline_hidream.py

@@ -146,11 +146,15 @@ class HiDreamImagePipelineFastTests(PipelineTesterMixin, unittest.TestCase):
         inputs = self.get_dummy_inputs(device)
         image = pipe(**inputs)[0]
         generated_image = image[0]
-
         self.assertEqual(generated_image.shape, (128, 128, 3))
-        expected_image = torch.randn(128, 128, 3).numpy()
-        max_diff = np.abs(generated_image - expected_image).max()
-        self.assertLessEqual(max_diff, 1e10)
+
+        # fmt: off
+        expected_slice = np.array([0.4507, 0.5256, 0.4205, 0.5791, 0.4848, 0.4831, 0.4443, 0.5107, 0.6586, 0.3163, 0.7318, 0.5933, 0.6252, 0.5512, 0.5357, 0.5983])
+        # fmt: on
+
+        generated_slice = generated_image.flatten()
+        generated_slice = np.concatenate([generated_slice[:8], generated_slice[-8:]])
+        self.assertTrue(np.allclose(generated_slice, expected_slice, atol=1e-3))
 
     def test_inference_batch_single_identical(self):
         super().test_inference_batch_single_identical(expected_max_diff=3e-4)