package function.builtin;

import static testutil.TestUtilities.*;

import org.junit.Test;

import function.ArgumentValidator.*;

public class GREATERPTester {

    @Test
    public void testGreaterpWithTwoNumbers_ReturnsNil() {
        String input = "(> 1 2)";

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

    @Test
    public void testGreaterpWithTwoNumbers_ReturnsT() {
        String input = "(> 3 2)";

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

    @Test
    public void testGreaterpWithManyNumbers_ReturnsNil() {
        String input = "(> 4 3 2 5 1)";

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

    @Test
    public void testGreaterpWithManyNumbers_ReturnsT() {
        String input = "(> 4 3 2 1 0)";

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

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

    @Test(expected = TooFewArgumentsException.class)
    public void testGreaterpWithTooFewArguments() {
        evaluateString("(> 1)");
    }

}