fixes tests

Signed-off-by: Wenqi Li <[email protected]>

Author: wyli

monai/data/meta_tensor.py

@@ -150,8 +150,10 @@ def __init__(
 
         if MetaKeys.SPACE not in self.meta:
             self.meta[MetaKeys.SPACE] = SpaceKeys.RAS  # defaulting to the right-anterior-superior space
+        if MetaKeys.EVALUATED not in self.meta:
+            self.meta[MetaKeys.EVALUATED] = True
         if MetaKeys.ORIGINAL_CHANNEL_DIM not in self.meta:
-            self.meta[MetaKeys.ORIGINAL_CHANNEL_DIM] = 0  # defaulting to channel first
+            self.meta[MetaKeys.ORIGINAL_CHANNEL_DIM] = "no_channel"  # defaulting to channel first
 
     @property
     def evaluated(self) -> bool:

tests/test_ensure_channel_first.py

@@ -81,7 +81,9 @@ def test_check(self):
         with self.assertRaises(ValueError):  # not MetaTensor
             EnsureChannelFirst(add_channel_default=False)(im)
         with self.assertRaises(ValueError):  # no meta
-            EnsureChannelFirst(add_channel_default=False)(MetaTensor(im))
+            test_case = MetaTensor(im)
+            test_case.meta.pop("original_channel_dim")
+            EnsureChannelFirst(add_channel_default=False)(test_case)
         with self.assertRaises(ValueError):  # no meta channel
             EnsureChannelFirst(add_channel_default=False)(im_nodim)