mod control_lib_tests {
    use relish::ast::{eval, lex, Ctr, SymTable};
    use relish::stdlib::{dynamic_stdlib, static_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(&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(&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 {
                eprintln!("{}", *eval(&tree, &mut syms).unwrap());
                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(&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);
        }
    }

    #[test]
    fn test_let_multiphase_locals() {
        let document = "(let (
                          (temp '1')
                          (temp (append () temp '2')))
                         temp)";
        let result = "('1' '2')";

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

    #[test]
    fn test_let_multibody_evals() {
        let document = "(let ((temp '1')) temp (append () temp '2'))";
        let result = "('1' '2')";

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

    #[test]
    fn test_let_multiphase_local_multibody_evals() {
        // prints 'first body' and then returns ('1' '2' '3')
        let document = "(let (
                          (temp '1')
                          (temp (append () temp '2')))
                         (echo 'first body')
                         (append temp '3'))";

        let result = "('1' '2' '3')";

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