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Diffstat (limited to 'numpy/testing/tests/test_utils.py')
| -rw-r--r-- | numpy/testing/tests/test_utils.py | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/numpy/testing/tests/test_utils.py b/numpy/testing/tests/test_utils.py index c82343f0c..377f570bd 100644 --- a/numpy/testing/tests/test_utils.py +++ b/numpy/testing/tests/test_utils.py @@ -953,6 +953,20 @@ class TestAssertAllclose: a = np.array([[1, 2, 3, "NaT"]], dtype="m8[ns]") assert_allclose(a, a) + def test_error_message_unsigned(self): + """Check the the message is formatted correctly when overflow can occur + (gh21768)""" + # Ensure to test for potential overflow in the case of: + # x - y + # and + # y - x + x = np.asarray([0, 1, 8], dtype='uint8') + y = np.asarray([4, 4, 4], dtype='uint8') + with pytest.raises(AssertionError) as exc_info: + assert_allclose(x, y, atol=3) + msgs = str(exc_info.value).split('\n') + assert_equal(msgs[4], 'Max absolute difference: 4') + class TestArrayAlmostEqualNulp: |