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Test added to check if MultiIndex is unique #44953

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Test added to check if MultiIndex is unique #44953

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9ea7689
new test
sukriti1 Dec 18, 2021
07d896f
refactor
sukriti1 Dec 18, 2021
aada6dd
change name of dataframe
sukriti1 Dec 18, 2021
f5b9b01
assertion update
sukriti1 Dec 18, 2021
c5ad493
assertion update
sukriti1 Dec 27, 2021
fb517a4
uptodate with master
sukriti1 Dec 27, 2021
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7 changes: 7 additions & 0 deletions pandas/tests/reshape/concat/test_index.py
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Expand Up @@ -257,3 +257,10 @@ def test_concat_multiindex_dfs_with_deepcopy(self):
tm.assert_frame_equal(result_copy, expected)
result_no_copy = concat(example_dict, names=["testname"])
tm.assert_frame_equal(result_no_copy, expected)

def test_concat_multiindex_unique_and_duplicate(self):
# GH#44786
df = DataFrame({"col": ["a", "b", "c"]}, index=["1", "2", "2"])
result = concat([df], keys=["X"])
assert not result.index.is_unique
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can you make an expected by hand and use tm.assert_frame_equal

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Thank you for the feedback @jreback ! I just added an expected index. Now, I am checking if expected index is equal to the result index in tm.assert_frame_equal.

assert result.index.has_duplicates