package function.builtin.special;

import static testutil.TestUtilities.*;

import org.junit.Test;

import function.ArgumentValidator.*;

public class DEFUNTester {

    @Test
    public void testDefun() {
        String input = "(defun f () nil)";

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

    @Test(expected = DottedArgumentListException.class)
    public void testDefunWithDottedLambdaList() {
        String input = "(funcall 'defun 'x (cons 'a 'b) ())";

        evaluateString(input);
    }

    @Test(expected = BadArgumentTypeException.class)
    public void testDefunWithNonSymbolName() {
        evaluateString("(defun 1 () ())");
    }

    @Test(expected = BadArgumentTypeException.class)
    public void testDefunWithBadLambdaList() {
        evaluateString("(defun x a ())");
    }

    @Test(expected = TooFewArgumentsException.class)
    public void testApplyWithTooFewArguments() {
        evaluateString("(defun x ())");
    }

}