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pytest approx wrong formatting return - printing all values as wrong. #12444
Description
Hey! Thanks for this great library!
I am using pytest.approx to compare between 2 dicts (which are not in the same order), whenever the 2 dicts are equal the asserts passes. but if only 1 element is wrong the assert fails (as expected) but the output message shows as if all values were different instead of printing only the wrong one.
pytest == 8.2.0
python == 3.11.7
Ubuntu == 20.04
def test_approx_dict_equal(): # This tests passes!
assert {'a': 1, 'c': 3} == pytest.approx({'a': 1, 'c': 3})
def test_approx_dict_ordered(): # This tests fails as expected and return CORRECT output
assert {'a': 1, 'c': 5} == pytest.approx({'a': 1, 'c': 3})
def test_approx_dict_unordered(): # This tests fails as expected and return WRONG output
assert {'c': 5, 'a': 1} == pytest.approx({'a': 1, 'c': 3})and the output I get from the two failing tests is:
================================================= short test summary info ==================================================
FAILED tests/test_debug_pytest.py::test_approx_dict_ordered - AssertionError: assert {'a': 1, 'c': 5} == approx({'a': 1 ± 1.0e-06, 'c': 3 ± 3.0e-06})
comparison failed. Mismatched elements: 1 / 2:
Max absolute difference: 2
Max relative difference: 0.6666666666666666
Index | Obtained | Expected
c | 5 | 3 ± 3.0e-06
FAILED tests/test_debug_pytest.py::test_approx_dict_unordered - AssertionError: assert {'c': 5, 'a': 1} == approx({'a': 1 ± 1.0e-06, 'c': 3 ± 3.0e-06})
comparison failed. Mismatched elements: 2 / 2:
Max absolute difference: 4
Max relative difference: 4.0
Index | Obtained | Expected
a | 1 | 1 ± 1.0e-06
c | 5 | 3 ± 3.0e-06
======================================== 2 failed, 1 passed, 4 deselected in 0.37s =========================================
Activity
Fix pytest.approx to correctly take account Mapping keys order to com…
Fix pytest.approx to correctly take account Mapping keys order to com…
Fix pytest.approx to correctly take account Mapping keys order to com…
build(security): Update dependency pytest to v9.0.3 [SECURITY] (#217)
chore(deps): update root dev dependencies (patch)
🔒️ Update dependency pytest to v9 [SECURITY] (#16)
[SECURITY] Update dependency pytest to v9 [SECURITY] (#2)
Update dependency pytest to v9 (#35)