code: def test_latitude_single_extreme_low(self):
      latitudes = [-87.0]
      lower, upper = latitude_bounds(latitudes)
      assert upper > lower
      assert lower == MIN_ALLOWED_LATITUDE
      assert 0.9 * EPSILON < upper - lower < 1.1 * EPSILON
  
imports: import unittest
  import numpy
  from ..bounds import latitude_bounds, longitude_bounds, merge_longitude_bounds, MAX_ALLOWED_LATITUDE, MIN_ALLOWED_LATITUDE, EPSILON
label_desc: Use image node_id 7 for calling the LatitudeBounds obj's underlying member method code with example usage: obj.test_latitude_single_extreme_low() without return types