FM / methods

/usr/local/lib64/python3.6/site-packages/pandas/tests/series/methods/

/usr/local/lib64/python3.6/site-packages/pandas/tests/series/methods

Name	Size	Mode	Actions
__pycache__/	-	0755	rm
test_align.py	5359	0644	edit dl rm
test_append.py	9600	0644	edit dl rm
test_argsort.py	2249	0644	edit dl rm
test_asfreq.py	3616	0644	edit dl rm
test_asof.py	5515	0644	edit dl rm
test_astype.py	2628	0644	edit dl rm
test_at_time.py	2629	0644	edit dl rm
test_autocorr.py	999	0644	edit dl rm
test_between.py	1197	0644	edit dl rm
test_between_time.py	5086	0644	edit dl rm
test_clip.py	3384	0644	edit dl rm
test_combine.py	627	0644	edit dl rm
test_combine_first.py	3411	0644	edit dl rm
test_compare.py	3734	0644	edit dl rm
test_convert_dtypes.py	9914	0644	edit dl rm
test_count.py	1123	0644	edit dl rm
test_cov_corr.py	5215	0644	edit dl rm
test_describe.py	4640	0644	edit dl rm
test_diff.py	2331	0644	edit dl rm
test_drop.py	2986	0644	edit dl rm
test_droplevel.py	629	0644	edit dl rm
test_drop_duplicates.py	6850	0644	edit dl rm
test_duplicated.py	996	0644	edit dl rm
test_equals.py	1295	0644	edit dl rm
test_explode.py	3538	0644	edit dl rm
test_fillna.py	6513	0644	edit dl rm
test_first_and_last.py	2042	0644	edit dl rm
test_head_tail.py	343	0644	edit dl rm
test_interpolate.py	27757	0644	edit dl rm
test_isin.py	3445	0644	edit dl rm
test_nlargest.py	7121	0644	edit dl rm
test_pct_change.py	2968	0644	edit dl rm
test_quantile.py	6810	0644	edit dl rm
test_rank.py	20287	0644	edit dl rm
test_reindex_like.py	1245	0644	edit dl rm
test_rename.py	3378	0644	edit dl rm
test_rename_axis.py	1503	0644	edit dl rm
test_replace.py	15559	0644	edit dl rm
test_reset_index.py	4636	0644	edit dl rm
test_round.py	1970	0644	edit dl rm
test_searchsorted.py	2121	0644	edit dl rm
test_shift.py	12595	0644	edit dl rm
test_sort_index.py	12277	0644	edit dl rm
test_sort_values.py	7981	0644	edit dl rm
test_to_dict.py	742	0644	edit dl rm
test_to_period.py	1755	0644	edit dl rm
test_to_timestamp.py	2616	0644	edit dl rm
test_truncate.py	5557	0644	edit dl rm
test_tz_convert.py	1008	0644	edit dl rm
test_tz_localize.py	3108	0644	edit dl rm
test_unstack.py	4208	0644	edit dl rm
test_update.py	4213	0644	edit dl rm
test_value_counts.py	8136	0644	edit dl rm
__init__.py	225	0644	edit dl rm

Edit: /usr/local/lib64/python3.6/site-packages/pandas/tests/series/methods/test_diff.py (2331B)

import numpy as np
import pytest

from pandas import Series, TimedeltaIndex, date_range
import pandas._testing as tm

class TestSeriesDiff:
    def test_diff_np(self):
        pytest.skip("skipping due to Series no longer being an ndarray")

# no longer works as the return type of np.diff is now nd.array
        s = Series(np.arange(5))

r = np.diff(s)
        tm.assert_series_equal(Series([np.nan, 0, 0, 0, np.nan]), r)

def test_diff_int(self):
        # int dtype
        a = 10000000000000000
        b = a + 1
        s = Series([a, b])

result = s.diff()
        assert result[1] == 1

def test_diff_tz(self):
        # Combined datetime diff, normal diff and boolean diff test
        ts = tm.makeTimeSeries(name="ts")
        ts.diff()

# neg n
        result = ts.diff(-1)
        expected = ts - ts.shift(-1)
        tm.assert_series_equal(result, expected)

# 0
        result = ts.diff(0)
        expected = ts - ts
        tm.assert_series_equal(result, expected)

# datetime diff (GH#3100)
        s = Series(date_range("20130102", periods=5))
        result = s.diff()
        expected = s - s.shift(1)
        tm.assert_series_equal(result, expected)

# timedelta diff
        result = result - result.shift(1)  # previous result
        expected = expected.diff()  # previously expected
        tm.assert_series_equal(result, expected)

# with tz
        s = Series(
            date_range("2000-01-01 09:00:00", periods=5, tz="US/Eastern"), name="foo"
        )
        result = s.diff()
        expected = Series(TimedeltaIndex(["NaT"] + ["1 days"] * 4), name="foo")
        tm.assert_series_equal(result, expected)

@pytest.mark.parametrize(
        "input,output,diff",
        [([False, True, True, False, False], [np.nan, True, False, True, False], 1)],
    )
    def test_diff_bool(self, input, output, diff):
        # boolean series (test for fixing #17294)
        s = Series(input)
        result = s.diff()
        expected = Series(output)
        tm.assert_series_equal(result, expected)

def test_diff_object_dtype(self):
        # object series
        s = Series([False, True, 5.0, np.nan, True, False])
        result = s.diff()
        expected = s - s.shift(1)
        tm.assert_series_equal(result, expected)

cmd: