code: def test_plot_kernel():
      # just a smoketest that fail
      kernel = Kernel([1, 2, 3, 4, 5])
      plt.plot(kernel)
  
imports: from datetime import datetime, timezone, timedelta
  import platform
  from unittest.mock import MagicMock
  import matplotlib.pyplot
  from matplotlib.testing.decorators import check_figures_equal, image_comparison
  import matplotlib.units
  from matplotlib.category import UnitData
  import numpy
  import pytest
label_desc: Use image node_id 15 for calling a global function with example usage: test_plot_kernel() without return types