assertEquals( calculatePositiveMask(list("a"), sp), alphaNode.getDeclaredMask( ) );
assertEquals( calculatePositiveMask(list("a", "b"), sp), alphaNode.getInferredMask() );
LeftInputAdapterNode liaNode = ( LeftInputAdapterNode ) alphaNode.getSinkPropagator().getSinks()[0];
RuleTerminalNode rtNode = ( RuleTerminalNode ) liaNode.getSinkPropagator().getSinks()[0];
assertEquals( calculatePositiveMask(list("b"), sp), rtNode.getDeclaredMask() );
assertEquals( calculatePositiveMask(list("a", "b"), sp), rtNode.getInferredMask() );
}