code: def test_one_bin(self):
      # Ticket 632
      hist, edges = histogram([1, 2, 3, 4], [1, 2])
      assert_array_equal(
          hist,
          [
              2,
          ],
      )
      assert_array_equal(edges, [1, 2])
      assert_raises(ValueError, histogram, [1, 2], bins=0)
      h, e = histogram([1, 2], bins=1)
      assert_equal(h, np.array([2]))
      assert_allclose(e, np.array([1.0, 2.0]))
  
imports: import numpy
  from numpy.lib.histograms import histogram, histogramdd, histogram_bin_edges
  from numpy.testing import assert_, assert_equal, assert_array_equal, assert_almost_equal, assert_array_almost_equal, assert_raises, assert_allclose, assert_array_max_ulp, assert_raises_regex, suppress_warnings
  from numpy.testing._private.utils import requires_memory
  import pytest
label_desc: Use image node_id 4 for calling the TestHistogram obj's underlying member method code with example usage: obj.test_one_bin() without return types