fix: Fixes wrong test case assumption when using linear interpolation on irregular index (test case pandas.tests.series.methods.test_interpolate.TestSeriesInterpolateData.test_nan_irregular_index).

Author: cbpygit

pandas/tests/series/methods/test_interpolate.py

@@ -271,7 +271,7 @@ def test_nan_interpolate(self, kwargs):
     def test_nan_irregular_index(self):
         s = Series([1, 2, np.nan, 4], index=[1, 3, 5, 9])
         result = s.interpolate()
-        expected = Series([1.0, 2.0, 3.0, 4.0], index=[1, 3, 5, 9])
+        expected = Series([1.0, 2.0, 2.6666666666666665, 4.0], index=[1, 3, 5, 9])
         tm.assert_series_equal(result, expected)
 
     def test_nan_str_index(self):