initial test

xarray/tests/test_dataset.py

@@ -2175,6 +2175,27 @@ def test_sel_method(self) -> None:
  with pytest.raises(ValueError, match=r"cannot supply"):
  data.sel(dim1=0, method="nearest")
 
+ def test_sel_method_with_slice(self) -> None:
+ # regression test for https://github.com/pydata/xarray/issues/10710
+
+ data_int_coords = xr.Dataset(coords={"lat": ("lat", [20, 21, 22, 23])})
+ expected = xr.Dataset(coords={"lat": ("lat", [21, 22])})
+ actual = data_int_coords.sel(lat=slice(21, 22), method="nearest")
+ assert_identical(expected, actual)
+
+ # check consistency with not passing method kwarg, for case of ints, where method kwarg should be irrelevant
+ expected = data_int_coords.sel(lat=slice(21, 22))
+ assert_identical(expected, actual)
+
+ data_float_coords = xr.Dataset(
+ coords={"lat": ("lat", [20.1, 21.1, 22.1, 23.1])}
+ )
+ expected = xr.Dataset(coords={"lat": ("lat", [21.1, 22.1])})
+ actual = data_float_coords.sel(lat=slice(21, 22), method="nearest")
+ assert_identical(expected, actual)
+
+ # TODO backwards slices?
+
  def test_loc(self) -> None:
  data = create_test_data()
  expected = data.sel(dim3="a")