code: def test_plot(self):
      mpl.rcParams["date.converter"] = "concise"
      N = 6
      fig, (ax1, ax2, ax3) = plt.subplots(3, 1, layout="constrained")
      x = np.array([datetime.datetime(2023, 9, n) for n in range(1, N)])
      ax1.plot(x, range(1, N))
      ax2.plot(range(1, N), x)
      ax3.plot(x, x)
  
imports: import datetime
  import numpy
  import pytest
  import matplotlib.pyplot
  import matplotlib
label_desc: Use image node_id 33 for calling the TestDatetimePlotting obj's underlying member method code with example usage: obj.test_plot() without return types