code: def test_get_indexer(self):
      idx = date_range("2000-01-01", periods=3)
      exp = np.array([0, 1, 2], dtype=np.intp)
      tm.assert_numpy_array_equal(idx.get_indexer(idx), exp)
  
      target = idx[0] + pd.to_timedelta(
          ["-1 hour", "12 hours", "1 day 1 hour"]
      )
      tm.assert_numpy_array_equal(
          idx.get_indexer(target, "pad"),
          np.array([-1, 0, 1], dtype=np.intp),
      )
      tm.assert_numpy_array_equal(
          idx.get_indexer(target, "backfill"),
          np.array([0, 1, 2], dtype=np.intp),
      )
      tm.assert_numpy_array_equal(
          idx.get_indexer(target, "nearest"),
          np.array([0, 1, 1], dtype=np.intp),
      )
      tm.assert_numpy_array_equal(
          idx.get_indexer(
              target, "nearest", tolerance=pd.Timedelta("1 hour")
          ),
          np.array([0, -1, 1], dtype=np.intp),
      )
      tol_raw = [
          pd.Timedelta("1 hour"),
          pd.Timedelta("1 hour"),
          pd.Timedelta("1 hour").to_timedelta64(),
      ]
      tm.assert_numpy_array_equal(
          idx.get_indexer(
              target,
              "nearest",
              tolerance=[np.timedelta64(x) for x in tol_raw],
          ),
          np.array([0, -1, 1], dtype=np.intp),
      )
      tol_bad = [
          pd.Timedelta("2 hour").to_timedelta64(),
          pd.Timedelta("1 hour").to_timedelta64(),
          "foo",
      ]
      msg = "Could not convert 'foo' to NumPy timedelta"
      with pytest.raises(ValueError, match=msg):
          idx.get_indexer(target, "nearest", tolerance=tol_bad)
      with pytest.raises(ValueError, match="abbreviation w/o a number"):
          idx.get_indexer(idx[[0]], method="nearest", tolerance="foo")
  
imports: from datetime import date, datetime, time, timedelta
  import numpy
  import pytest
  from pandas._libs import index
  from pandas.compat.numpy import np_long
  import pandas
  from pandas import DatetimeIndex, Index, Timestamp, bdate_range, date_range, notna
  import pandas._testing
  from pandas.tseries.frequencies import to_offset
label_desc: Use image node_id 2 for calling the TestGetIndexer obj's underlying member method code with example usage: obj.test_get_indexer() without return types