code: def setUp(self):
      super().setUp()
  
      # Precompute coordinates
      self.xs = [3000000, 2000000, 1000000]
      self.ys = [-3000000, -2000000, -1000000]
      self.x_range = (-5000000, 4000000)
      self.x_center = sum(self.x_range) / 2.0
      self.y_range = (-3000000, 2000000)
      self.y_center = sum(self.y_range) / 2.0
      (
          self.lon_centers,
          self.lat_centers,
      ) = Tiles.easting_northing_to_lon_lat(
          [self.x_center], [self.y_center]
      )
      self.lon_center, self.lat_center = (
          self.lon_centers[0],
          self.lat_centers[0],
      )
      self.lons, self.lats = Tiles.easting_northing_to_lon_lat(
          self.xs, self.ys
      )
  
imports: import numpy
  from holoviews.element import Curve, Tiles
  from .test_plot import TestPlotlyPlot
label_desc: Use image node_id 1 for calling the TestMapboxCurvePlot obj's underlying member method code with example usage: obj.setUp() without return types