public static void EvaluateChoose()
{    
    Project project = CreateTestProjectWithCustomField();
    
    // Set Formula
    project.getExtendedAttributes().get(0).setFormula("Choose(3, \"This is a\", \"right\", \"choice\")");
    
    // Print extended attribute value
    Task task = project.getRootTask().getChildren().getById(1);
    System.out.println(task.getExtendedAttributes().get(0).getTextValue());
}

public static void EvaluateIsNumeric()
{
    String[] numericFormulas = { "IsNumeric('AAA')", "IsNUmeric(1)", "IsNumeric(1<0)", "IsNumeric(\"1.1\")", "IsNumeric(Choose((2 + Sgn(2^-3)), 123, \"one two three\"))" };
    
    Project project = CreateTestProjectWithCustomField();
    
    for (String numericFormula : numericFormulas)    
    {
        // Set Formula
        project.getExtendedAttributes().get(0).setFormula(numericFormula);

        // Print extended attribute value
        Task task = project.getRootTask().getChildren().getById(1);
        System.out.println(task.getExtendedAttributes().get(0).getTextValue());
    }           
}

public static void EvaluateSwitch()
{    
    Project project = CreateTestProjectWithCustomField();

    // Set Formula
    project.getExtendedAttributes().get(0).setFormula("Switch( 0 < 1, \"0 is lesser than 1\", 0 > 1, \"0 is greater than 1\")");

    // Print extended attribute value
    Task task = project.getRootTask().getChildren().getById(1);
    System.out.println(task.getExtendedAttributes().get(0).getTextValue());
}