package org.apidesign.vm4brwsr;

import javax.script.Invocable;

import javax.script.ScriptException;

import org.testng.annotations.Test;

import static org.testng.Assert.*;

/**

 *

 * @author Jaroslav Tulach <jtulach@netbeans.org>

 */

public class StringTest {

    @Test public void firstChar() throws Exception {

        assertExec(

            "First char in Hello is H",

            "org_apidesign_vm4brwsr_StringSample_sayHelloCI",

            "H", 0

        );

    }

    @Test public void toStringConcatenation() throws Exception {

        assertExec(

            "Five executions should generate 5Hello World!",

            "org_apidesign_vm4brwsr_StringSample_toStringTestLjava_lang_StringI",

            "5Hello World!", 5

        );

    }

    private static void assertExec(String msg, String methodName, Object expRes, Object... args) throws Exception {

        StringBuilder sb = new StringBuilder();

        Invocable i = StaticMethodTest.compileClass(sb, 

            "org/apidesign/vm4brwsr/StringSample",

            "java/lang/String"

        );

        Object ret = null;

        try {

            ret = i.invokeFunction(methodName, args);

        } catch (ScriptException ex) {

            fail("Execution failed in " + sb, ex);

        } catch (NoSuchMethodException ex) {

            fail("Cannot find method in " + sb, ex);

        }

        if (ret == null && expRes == null) {

            return;

        }

        if (expRes.equals(ret)) {

            return;

        }

        assertEquals(ret, expRes, msg + "was: " + ret + "\n" + sb);

    }

}