public void NoOfDifferentSymbol_does_it_return_right_type()
{
//Arrange
var processObject = new ProcessLogicClass(">(a,b)");
var truthTableObject = new TruthTable(processObject);
//Act
var valueReturn = truthTableObject.NoOfDifferentSymbol("a", "b");
//Assert
Assert.IsInstanceOfType(valueReturn, typeof(int));
}