package function.builtin;

import static testutil.TestUtilities.*;

import org.junit.Test;

import function.ArgumentValidator.*;
import sexpression.Cons;

public class APPLYTester {

    @Test
    public void testApply() {
        String input = "(apply '+ '(1 2 3))";

        assertSExpressionsMatch(evaluateString(input), parseString("6"));
    }

    @Test
    public void testApplyWithLambdaExpression() {
        String input = "(apply (lambda (x) (+ x 1)) '(25))";

        assertSExpressionsMatch(evaluateString(input), parseString("26"));
    }

    @Test
    public void testApplyWithQuotedLambdaExpression() {
        String input = "(apply '(lambda (x) (+ x 1)) '(25))";

        assertSExpressionsMatch(evaluateString(input), parseString("26"));
    }

    @Test
    public void testStaticApplyCall() {
        String argumentList = "(+ (25 10))";
        Cons parsedArgumentList = (Cons) parseString(argumentList);

        assertSExpressionsMatch(APPLY.apply(parsedArgumentList), parseString("35"));
    }

    @Test(expected = RuntimeException.class)
    public void testApplyWithUndefinedFunction() {
        evaluateString("(apply 'f '(1 2 3))");
    }

    @Test(expected = RuntimeException.class)
    public void testApplyWithNonListSecondArgument() {
        evaluateString("(apply '+ '2)");
    }

    @Test(expected = TooManyArgumentsException.class)
    public void testApplyWithTooManyArguments() {
        evaluateString("(apply '1 '2 '3)");
    }

    @Test(expected = TooFewArgumentsException.class)
    public void testApplyWithTooFewArguments() {
        evaluateString("(apply '1)");
    }

}