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[MPS] Fix [nan]median output for empty tensors (#162846)

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It should be `NaN` rather than 0

Added respective checks to `test_empty_tensor`

Fixes https://github.com/pytorch/pytorch/issues/162798
Pull Request resolved: https://github.com/pytorch/pytorch/pull/162846
Approved by: https://github.com/dcci
This commit is contained in:
Nikita Shulga
2025-09-12 13:33:49 -07:00
committed by PyTorch MergeBot
parent ee53ad2dd0
commit d25c35d2b2
2 changed files with 4 additions and 0 deletions
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test/test_mps.py
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@ -11628,6 +11628,9 @@ class TestAdvancedIndexing(TestCaseMPS):
def test_empty_reduce(self, device="mps"):
x = torch.rand(0, 3, device=device)
self.assertTrue(x.mean().isnan())
self.assertTrue(x.nanmean().isnan())
self.assertTrue(x.median().isnan())
self.assertTrue(x.nanmedian().isnan())
self.assertEqual(x.count_nonzero(), 0)
self.assertEqual(x.sum(), 0)
self.assertEqual(x.nansum(), 0)