@Test
public void testDoesDependencyExist() {

  final ParameterDependencyGraph dependencyGraph = new ParameterDependencyGraph( "param1",
    "param2", "param3" );
  assertFalse( dependencyGraph.doesDependencyExist( "param2" ) );
  dependencyGraph.addDependency( "param1", "param2" );
  assertTrue( dependencyGraph.doesDependencyExist( "param2" ) );
}