docstr: ...Test get_norm method of HawkesKernel
code: def test_get_norm(self):
      """...Test get_norm method of HawkesKernel"""
      self.assertEqual(
          self.hawkes_kernel_exp.get_norm(), self.intensity
      )
  
file_path: tick/tick/hawkes/simulation/tests/hawkes_kernel_test.py
imports: import unittest
  import numpy
  from tick.hawkes import HawkesKernelExp, HawkesKernelPowerLaw
label_desc: Use image node_id 7 for calling the Test obj's underlying member method code with example usage: obj.test_get_norm() without return types