package function.builtin.cons;

import static testutil.TestUtilities.*;

import org.junit.Test;

import function.ArgumentValidator.*;
import sexpression.*;

public class CONSTester {

    @Test
    public void testConsWithNilValues() {
        String input = "(cons () nil)";

        assertSExpressionsMatch(evaluateString(input), parseString("(())"));
    }

    @Test
    public void testConsWithTwoSymbols() {
        String input = "(cons 'a 'b)";

        assertSExpressionsMatch(evaluateString(input), new Cons(new Symbol("A"), new Symbol("B")));
    }

    @Test
    public void testConsWithListAsCdr() {
        String input = "(cons 1 '(2 3))";

        assertSExpressionsMatch(evaluateString(input), parseString("(1 2 3)"));
    }
    @Test
    public void testConsWithTwoLists() {
        String input = "(cons '(1 2) '(3 4))";

        assertSExpressionsMatch(evaluateString(input), parseString("((1 2) 3 4)"));
    }


    @Test
    public void testConsWithList() {
        String input = "(cons nil '(2 3))";

        assertSExpressionsMatch(evaluateString(input), parseString("(nil 2 3)"));
    }

    @Test(expected = TooManyArgumentsException.class)
    public void testConsWithTooManyArguments() {
        String input = "(cons 1 2 3)";

        evaluateString(input);
    }

    @Test(expected = TooFewArgumentsException.class)
    public void testConsWithTooFewArguments() {
        String input = "(cons 1)";

        evaluateString(input);
    }

}