def test_compute_spacing_counts_counts_negative(diff_array, exp_median, exp_counts):
_median, counts = XAxis.compute_spacing_counts(-diff_array)
assert exp_counts == counts
def test_compute_spacing_counts_median(diff_array, exp_median, exp_counts):
median, _counts = XAxis.compute_spacing_counts(diff_array)
assert exp_median == median