code: def test_LatitudeFormatter_direction_label():
      formatter = LatitudeFormatter(direction_label=False)
      p = ccrs.PlateCarree()
      formatter.set_axis(Mock(axes=Mock(GeoAxes, projection=p)))
      test_ticks = [-90, -60, -30, 0, 30, 60, 90]
      result = [formatter(tick) for tick in test_ticks]
      expected = ["-90°", "-60°", "-30°", "0°", "30°", "60°", "90°"]
      assert result == expected
  
imports: from unittest.mock import Mock
  import matplotlib.pyplot
  import numpy
  import pytest
  import cartopy.crs
  from cartopy.mpl.geoaxes import GeoAxes
  from cartopy.mpl.ticker import LatitudeFormatter, LatitudeLocator, LongitudeFormatter, LongitudeLocator
label_desc: Use image node_id 3 for calling a global function with example usage: test_LatitudeFormatter_direction_label() without return types