def test_define_bins(self, data_field_class):
r"""
Testing range bin generation
"""
hist = HistogramRange(data_field_class())
hist.args = {'num_bins': 10, 'range': [10.0, 90.0]}
hist.data_map = sp.ones((hist.nz, hist.nx), dtype=int)
for i in range(hist.nz):
hist.data_map[i, :] = 10 * (i+1)
hist.data_vector = sp.ravel(hist.data_map)
#
hist.define_bins()
#
assert len(hist.bins) == 10
