text: """
  Test for the molecule module
  """
  import pytest
  import star
  
  def test_molecular_mass():
      symbols = ['C', 'H', 'H', 'H', 'H']
  
      calculated_mass = star.calculate_molecular_mass(symbols)
  
      actual_mass = 16.04
  
      assert pytest.approx(actual_mass, abs=1e-2) == calculated_mass
  
  