BUG: `pd.testing.assert_frame_equal` does not propagate precision to interval dtype

[stephanegaiffas]

• I have checked that this issue has not already been reported.

• I have confirmed this bug exists on the latest version of pandas.

• I have confirmed this bug exists on the master branch of pandas.

Reproducible Example

df1 = pd.DataFrame()
df1[0] = pd.arrays.IntervalArray.from_tuples([(1.0, 2.0)])

df2 = pd.DataFrame()
df2[0] = pd.arrays.IntervalArray.from_tuples([(1.0000000000001, 2.0)])

# Using very large tolerances do not propagate to the interval dtype, since this assert fails:
pd.testing.assert_frame_equal(df1, df2, check_exact=False, rtol=10., atol=10.)

Issue Description

It seems that pd.testing.assert_frame_equal does not propagate chosen tolerances for interval dtype comparison.

Expected Behavior

df1 = pd.DataFrame()
df1[0] = pd.arrays.IntervalArray.from_tuples([(1.0, 2.0)])
df2 = pd.DataFrame()
df2[0] = pd.arrays.IntervalArray.from_tuples([(1.0000000000001, 2.0)])

This test should pass...

pd.testing.assert_frame_equal(df1, df2, check_exact=False, rtol=10., atol=10.)

Installed Versions

INSTALLED VERSIONS ------------------ commit : 2cb9652 python : 3.8.8.final.0 python-bits : 64 OS : Darwin OS-release : 20.5.0 Version : Darwin Kernel Version 20.5.0: Sat May 8 05:10:33 PDT 2021; root:xnu-7195.121.3~9/RELEASE_X86_64 machine : x86_64 processor : i386 byteorder : little LC_ALL : None LANG : fr_FR.UTF-8 LOCALE : fr_FR.UTF-8

pandas : 1.2.4
numpy : 1.20.1
pytz : 2021.1
dateutil : 2.8.1
pip : 21.0.1
setuptools : 52.0.0.post20210125
Cython : 0.29.23
pytest : 6.2.3
hypothesis : None
sphinx : 4.0.1
blosc : None
feather : None
xlsxwriter : 1.3.8
lxml.etree : 4.6.3
html5lib : 1.1
pymysql : None
psycopg2 : None
jinja2 : 2.11.3
IPython : 7.22.0
pandas_datareader: None
bs4 : 4.9.3
bottleneck : 1.3.2
fsspec : 0.9.0
fastparquet : None
gcsfs : None
matplotlib : 3.3.4
numexpr : 2.7.3
odfpy : None
openpyxl : 3.0.7
pandas_gbq : None
pyarrow : None
pyxlsb : None
s3fs : None
scipy : 1.6.2
sqlalchemy : 1.4.7
tables : 3.6.1
tabulate : None
xarray : None
xlrd : 2.0.1
xlwt : 1.3.0
numba : 0.53.1

[mzeitlin11]

Thanks for reporting this @stephanegaiffas! Confirmed on master, looks like assert_interval_array_equal doesn't support tolerance arguments so they just end up ignored. Looks to also be an issue for some other ExtensionDtypes like sparse.

[SomtochiUmeh]

take

[SomtochiUmeh]

The function calls assert_interval_array_equal() within assert_series_equal() after assert_frame_equal(). Can I create another function, assert_interval_array_almost_equal(), that would take in the relative and absolute tolerances because assert_interval_array_equal() checks if the values are exactly equal and doesn't pass down the keyword arguments?