def test_simulation_singleton(self):
simulation_a = Simulation()
simulation_b = Simulation()
simulation_a.common_data = 'test data'
self.assertEqual(simulation_a.common_data, simulation_b.common_data)
def test_simulation_singleton(self):
simulation_a = Simulation()
simulation_b = Simulation()
simulation_a.common_data = 'test data'
self.assertEqual(simulation_a.common_data, simulation_b.common_data)
