package function.builtin;

import static testutil.TestUtilities.*;

import org.junit.Test;

import function.ArgumentValidator.*;

public class CARTester {

    @Test
    public void testCarWithNil() {
        String input = "(car nil)";

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

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

        assertSExpressionsMatch(evaluateString(input), parseString("1"));
    }

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

        assertSExpressionsMatch(evaluateString(input), parseString("1"));
    }

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

    @Test(expected = TooManyArgumentsException.class)
    public void testCarWithTooManyArguments() {
        String input = "(car '(1 2) '(1 2) \"oh\")";

        assertSExpressionsMatch(evaluateString(input), parseString("1"));
    }

    @Test(expected = TooFewArgumentsException.class)
    public void testCarWithTooFewArguments() {
        String input = "(car)";

        assertSExpressionsMatch(evaluateString(input), parseString("1"));
    }

}