BUG: assert_array_almost_equal fails to compare array with masked array
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05 - Testing
15 - Discussion
component: numpy.ma
- Dominant language
- Python
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Description
Reproducing code example:
The following code sample passes, but is expected to fail:
from numpy.testing import assert_array_almost_equal
assert_array_almost_equal(np.array([10, 20]), np.ma.array([10, np.nan], mask=[False, True]), 2)
Numpy/Python version information:
python 3.7.3
numpy 1.17.2
Contributor guide
First steps
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- Open a pull request that references the issue number.
Research direction
Start by running the provided Python reproducer and tracing the assert_array_almost_equal entry point in NumPy's testing code. Identify the existing tests for array and masked-array comparisons, then add regression coverage so this case fails as expected under the documented comparison behavior.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python
- Domain
- testing-qa
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100