[Dit] Fix dit tests (open-mmlab#2034)

* [Dit] Fix dit tests

* up

tests/pipelines/dit/test_dit.py

@@ -36,10 +36,10 @@ class DiTPipelineFastTests(PipelineTesterMixin, unittest.TestCase):
     def get_dummy_components(self):
         torch.manual_seed(0)
         transformer = Transformer2DModel(
-            sample_size=4,
+            sample_size=16,
             num_layers=2,
-            patch_size=2,
-            attention_head_dim=2,
+            patch_size=4,
+            attention_head_dim=8,
             num_attention_heads=2,
             in_channels=4,
             out_channels=8,
@@ -79,10 +79,8 @@ def test_inference(self):
         image = pipe(**inputs).images
         image_slice = image[0, -3:, -3:, -1]
 
-        self.assertEqual(image.shape, (1, 4, 4, 3))
-        expected_slice = np.array(
-            [0.44405967, 0.33592293, 0.6093237, 0.48981372, 0.79098296, 0.7504172, 0.59413105, 0.49462673, 0.35190058]
-        )
+        self.assertEqual(image.shape, (1, 16, 16, 3))
+        expected_slice = np.array([0.4380, 0.4141, 0.5159, 0.0000, 0.4282, 0.6680, 0.5485, 0.2545, 0.6719])
         max_diff = np.abs(image_slice.flatten() - expected_slice).max()
         self.assertLessEqual(max_diff, 1e-3)