code: def test_ellipse_simple_constructor_pentagon(self):
      ellipse = Ellipse(0, 0, 1, samples=6)
      self.assertEqual(
          np.allclose(ellipse.data[0], self.pentagon), True
      )
  
imports: import numpy
  from holoviews import Box, Dataset, Ellipse, Path, Polygons
  from holoviews.core.data.interface import DataError
  from holoviews.element.comparison import ComparisonTestCase
label_desc: Use image node_id 3 for calling the EllipseTests obj's underlying member method code with example usage: obj.test_ellipse_simple_constructor_pentagon() without return types