new_contents: import unittest
  
  testmodules = [
      'test_gate',
      'test_register',
      'test_quantum_circuit'
  ]
  
  suite = unittest.TestSuite()
  
  for t in testmodules:
      suite.addTest(unittest.defaultTestLoader.loadTestsFromName(t))
  
  unittest.TextTestRunner().run(suite)
  
subject: add test suite that runs all tests