package function.builtin.predicate;

import static testutil.TestUtilities.*;

import org.junit.Test;

import function.ArgumentValidator.*;

public class ATOMTester {

    @Test
    public void testAtom_ReturnsTrue() {
        String input = "(atom 'a)";

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

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

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

    @Test(expected = TooManyArgumentsException.class)
    public void testApplyWithTooManyArguments() {
        evaluateString("(atom '1 '2)");
    }

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

}