mod control_lib_tests {
    use relish::ast::{Ctr, eval, lex, SymTable};
    use relish::stdlib::{static_stdlib, dynamic_stdlib};

    #[test]
    fn test_if_first_case_singlet() {
        let document = "(if true 1 2)";
        let result = 1;

        let mut syms = SymTable::new();
        static_stdlib(&mut syms).unwrap();
        dynamic_stdlib(false, &mut syms).unwrap();

        if let Ok(tree) = lex(&document.to_string()) {
            if let Ctr::Integer(i) = *eval(&tree, &mut syms).unwrap() {
                assert_eq!(i, result);
            } else {
                assert!(false);
            }
        } else {
            assert!(false);
        }
    }

    #[test]
    fn test_if_second_case_singlet() {
        let document = "(if false 1 2)";
        let result = 2;

        let mut syms = SymTable::new();
        static_stdlib(&mut syms).unwrap();
        dynamic_stdlib(false, &mut syms).unwrap();

        if let Ok(tree) = lex(&document.to_string()) {
            if let Ctr::Integer(i) = *eval(&tree, &mut syms).unwrap() {
                assert_eq!(i, result);
            } else {
                assert!(false);
            }
        } else {
            assert!(false);
        }
    }

    #[test]
    fn test_complex_case_call() {
        let document = "(if true (append () 1) 2)";
        let result = "(1)";

        let mut syms = SymTable::new();
        static_stdlib(&mut syms).unwrap();
        dynamic_stdlib(false, &mut syms).unwrap();

        if let Ok(tree) = lex(&document.to_string()) {
            if let Ctr::Seg(ref i) = *eval(&tree, &mut syms).unwrap() {
                assert_eq!(i.to_string(), result);
            } else {
                assert!(false);
            }
        } else {
            assert!(false);
        }
    }
}