code: def test_curves_unequal(self):
      try:
          self.assertEqual(self.curve1, self.curve2)
      except AssertionError as e:
          if not str(e).startswith(
              "Curve not of matching length, 100 vs. 101"
          ):
              raise self.failureException(
                  "Curve mismatch error not raised."
              )
  
imports: import numpy
  from holoviews import Bars, Curve, Dimension, Histogram, Points, Scatter, VectorField
  from holoviews.element.comparison import ComparisonTestCase
label_desc: Use image node_id 3 for calling the CurveComparisonTest obj's underlying member method code with example usage: obj.test_curves_unequal() without return types