package function.builtin;

import static testutil.TestUtilities.*;

import org.junit.Test;

import function.ArgumentValidator.*;

public class CDRTester {

    @Test
    public void testCdrWithNil() {
        String input = "(cdr nil)";

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

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

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

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

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

    @Test(expected = BadArgumentTypeException.class)
    public void testCdrWithNonList() {
        evaluateString("(cdr 'x)");
    }

    @Test(expected = TooManyArgumentsException.class)
    public void testCdrWithTooManyArguments() {
        evaluateString("(cdr '(1 2) '(1 2) \"oh\")");
    }

    @Test(expected = TooFewArgumentsException.class)
    public void testCdrWithTooFewArguments() {
        evaluateString("(cdr)");
    }

}