code: def testSimple(self):
      # Test it works correctly for standard input, also test on edge points
      bpf = BPF(xPoints=[0, 10, 20], yPoints=[0, 20, 0])
  
      self.assertEqual(bpf(0.0), 0.0)
      self.assertEqual(bpf(5.0), 10.0)
      self.assertEqual(bpf(5.5), 11.0)
      self.assertEqual(bpf(15.0), 10.0)
      self.assertEqual(bpf(20.0), 0.0)
      self.assertEqual(bpf(10.0), 20.0)
  
imports: from essentia_test import *
label_desc: Use image node_id 2 for calling the TestBPF obj's underlying member method code with example usage: obj.testSimple() without return types