code: def test_1d(self):
      assert_array_equal(
          r_[1, 2, 3, 4, 5, 6], np.array([1, 2, 3, 4, 5, 6])
      )
      b = np.ones(5)
      c = r_[b, 0, 0, b]
      assert_array_equal(c, [1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1])
  
imports: import pytest
  import numpy
  from numpy.testing import assert_, assert_equal, assert_array_equal, assert_almost_equal, assert_array_almost_equal, assert_raises, assert_raises_regex
  from numpy.lib.index_tricks import mgrid, ogrid, ndenumerate, fill_diagonal, diag_indices, diag_indices_from, index_exp, ndindex, r_, s_, ix_
label_desc: Use image node_id 1 for calling the TestConcatenator obj's underlying member method code with example usage: obj.test_1d() without return types