package function.builtin.predicate;

import function.ArgumentValidator.TooFewArgumentsException;
import function.ArgumentValidator.TooManyArgumentsException;
import org.junit.Test;
import testutil.SymbolAndFunctionCleaner;

import static testutil.TestUtilities.evaluateString;
import static testutil.TypeAssertions.assertNil;
import static testutil.TypeAssertions.assertT;

public class AtomTest extends SymbolAndFunctionCleaner {

    @Test
    public void atomIsAtom() {
        assertT(evaluateString("(atom 'a)"));
    }

    @Test
    public void atomIsAtomWithAlias() {
        assertT(evaluateString("(atom? 'a)"));
    }

    @Test
    public void listIsNotAtom() {
        assertNil(evaluateString("(atom '(1 2 3))"));
    }

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

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