code: def test_longitude_bounds(self):
      longitudes = [10.0, 15.0, 20.0]
      lower, upper = longitude_bounds(longitudes)
      assert 5.0 < lower < 15.0
      assert 15.0 < upper < 25.0
  
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 2 for calling the LongitudeBounds obj's underlying member method code with example usage: obj.test_longitude_bounds() without return types