[Fix]: Add PixMIM UT

tests/test_models/test_algorithms/test_pixmim.py

@@ -0,0 +1,63 @@
+# Copyright (c) OpenMMLab. All rights reserved.
+import copy
+import platform
+
+import pytest
+import torch
+
+from mmselfsup.models.algorithms.pixmim import PixMIM
+from mmselfsup.structures import SelfSupDataSample
+from mmselfsup.utils import register_all_modules
+
+register_all_modules()
+
+backbone = dict(type='MAEViT', arch='b', patch_size=16, mask_ratio=0.75)
+neck = dict(
+    type='MAEPretrainDecoder',
+    patch_size=16,
+    in_chans=3,
+    embed_dim=768,
+    decoder_embed_dim=512,
+    decoder_depth=8,
+    decoder_num_heads=16,
+    mlp_ratio=4.,
+)
+loss = dict(type='MAEReconstructionLoss')
+head = dict(type='MAEPretrainHead', norm_pix=False, patch_size=16, loss=loss)
+target_generator = dict(type='LowFreqTargetGenerator', radius=40, img_size=224)
+
+
+@pytest.mark.skipif(platform.system() == 'Windows', reason='Windows mem limit')
+def test_pixmim():
+    data_preprocessor = {
+        'mean': [0.5, 0.5, 0.5],
+        'std': [0.5, 0.5, 0.5],
+        'bgr_to_rgb': True
+    }
+
+    alg = PixMIM(
+        backbone=backbone,
+        neck=neck,
+        head=head,
+        data_preprocessor=copy.deepcopy(data_preprocessor),
+        target_generator=target_generator)
+
+    fake_data = {
+        'inputs': [torch.randn((2, 3, 224, 224))],
+        'data_sample': [SelfSupDataSample() for _ in range(2)]
+    }
+    fake_batch_inputs, fake_data_samples = alg.data_preprocessor(fake_data)
+    fake_outputs = alg(fake_batch_inputs, fake_data_samples, mode='loss')
+    assert isinstance(fake_outputs['loss'].item(), float)
+
+    # test extraction
+    fake_feats = alg(fake_batch_inputs, fake_data_samples, mode='tensor')
+    assert list(fake_feats.shape) == [2, 196, 768]
+
+    # test reconstruct
+    mean = fake_feats.mean(dim=-1, keepdim=True)
+    std = (fake_feats.var(dim=-1, keepdim=True) + 1.e-6)**.5
+    results = alg.reconstruct(
+        fake_feats, fake_data_samples, mean=mean, std=std)
+    assert list(results.mask.value.shape) == [2, 224, 224, 3]
+    assert list(results.pred.value.shape) == [2, 224, 224, 3]