Incorrect getitem test?

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#172 opened on Feb 25, 2023 0 comments 1 reaction 0 assignees View on GitHub

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Assessment

Difficulty: 3/5
Estimated time: 1-2 days
Newbie friendliness: 42/100

Issue type: Bug
Clarity: Needs clarification
Activity status: Stale
Tech stack: python
Domain: testing-qa

Research direction

Start with the test_getitem property and reproduce the reported case using shape=(1,), dtype=numpy.float32, data=-0.0, and key=(0,). Determine whether the assertion incorrectly treats -0.0 as unequal to 0.0; done means the test behavior is corrected or the failure is shown to be valid.

Written by the indexing model from the issue text.

Description

bug

cupy fails test_getitem with:

E                       AssertionError: out=-0.0, should be 0.0 [__getitem__()]
E                       Falsifying example: test_getitem(
E                           shape=(1,), dtype=numpy.float32, data=data(...),
E                       )
E                       Draw 1 (obj): [-0.0]
E                       x=array([-0.], dtype=float32)
E                       Draw 2 (key): (0,)

It seems like it is saying that asarray([-0.0])[0,] should be 0.0 instead of -0.0. CuPy appears to be correct:

>>> import cupy as cp
>>> cp.array([-0.0], dtype=cp.float32)[0,]
array(-0., dtype=float32)

It's possible I'm misinterpreting the test. The output of the tests when there are data().draw()s isn't always very readable.

Dominant language: Python
Stars: 74
Forks: 54
Avg merge: 4h 35m
Merged PRs (30d): 4

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