code: def test_LatitudeFormatter_small_numbers():
      formatter = LatitudeFormatter(number_format=".7f", dms=False)
      p = ccrs.PlateCarree()
      formatter.set_axis(Mock(axes=Mock(GeoAxes, projection=p)))
      test_ticks = [40.1275150, 40.1275152, 40.1275154]
      result = [formatter(tick) for tick in test_ticks]
      expected = ["40.1275150°N", "40.1275152°N", "40.1275154°N"]
      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 7 for calling a global function with example usage: test_LatitudeFormatter_small_numbers() without return types