/**

 * Java 4 Browser Bytecode Translator

 * Copyright (C) 2012-2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>

 *

 * This program is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, version 2 of the License.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program. Look for COPYING file in the top folder.

 * If not, see http://opensource.org/licenses/GPL-2.0.

 */

package org.apidesign.vm4brwsr;

import javax.script.Invocable;

import javax.script.ScriptException;

import org.testng.annotations.Test;

import static org.testng.Assert.*;

import org.testng.annotations.BeforeClass;

import org.testng.annotations.BeforeTest;

/**

 *

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

 */

public class InstanceTest {

    @Test public void verifyDefaultDoubleValue() throws Exception {

        assertExec(

            "Will be zero",

            "org_apidesign_vm4brwsr_Instance_defaultDblValueD",

            Double.valueOf(0)

        );

    }

    @Test public void verifyStaticMethodCall() throws Exception {

        assertExec(

            "Will be zero",

            "org_apidesign_vm4brwsr_InstanceSub_recallDblD",

            Double.valueOf(0)

        );

    }

    @Test public void verifyAssignedByteValue() throws Exception {

        assertExec(

            "Will one thirty one",

            "org_apidesign_vm4brwsr_Instance_assignedByteValueB",

            Double.valueOf(31)

        );

    }

    @Test public void verifyMagicOne() throws Exception {

        assertExec(

            "Should be three and something",

            "org_apidesign_vm4brwsr_Instance_magicOneD",

            Double.valueOf(3.3)

        );

    }

    @Test public void verifyInstanceMethods() throws Exception {

        assertExec(

            "Should be eleven as we invoke overwritten method, plus 44",

            "org_apidesign_vm4brwsr_Instance_virtualBytesI",

            Double.valueOf(55)

        );

    }

    @Test public void verifyInterfaceMethods() throws Exception {

        assertExec(

            "Retruns default value",

            "org_apidesign_vm4brwsr_Instance_interfaceBytesF",

            Double.valueOf(31)

        );

    }

    @Test public void isNull() throws Exception {

        assertExec(

            "Yes, we are instance",

            "org_apidesign_vm4brwsr_Instance_isNullZ",

            Double.valueOf(0.0)

        );

    }

    @Test public void isInstanceOf() throws Exception {

        assertExec(

            "Yes, we are instance",

            "org_apidesign_vm4brwsr_Instance_instanceOfZZ",

            Double.valueOf(1.0), true

        );

    }

    @Test public void notInstanceOf() throws Exception {

        assertExec(

            "No, we are not an instance",

            "org_apidesign_vm4brwsr_Instance_instanceOfZZ",

            Double.valueOf(0.0), false

        );

    }

    @Test public void verifyCastToClass() throws Exception {

        assertExec(

            "Five signals all is good",

            "org_apidesign_vm4brwsr_Instance_castsWorkIZ",

            Double.valueOf(5.0), false

        );

    }

    @Test public void verifyCastToInterface() throws Exception {

        assertExec(

            "Five signals all is good",

            "org_apidesign_vm4brwsr_Instance_castsWorkIZ",

            Double.valueOf(5.0), true

        );

    }

    protected String startCompilationWith() {

        return "org/apidesign/vm4brwsr/Instance";

    }

    private static CharSequence codeSeq;

    private static Invocable code;

    @BeforeTest 

    public void compileTheCode() throws Exception {

        if (codeSeq == null) {

            StringBuilder sb = new StringBuilder();

            code = StaticMethodTest.compileClass(sb, startCompilationWith());

            codeSeq = sb;

        }

    }

    private void assertExec(

        String msg, String methodName, Object expRes, Object... args

    ) throws Exception {

        Object ret = null;

        try {

            ret = code.invokeFunction(methodName, args);

        } catch (ScriptException ex) {

            fail("Execution failed in\n" + codeSeq, ex);

        } catch (NoSuchMethodException ex) {

            fail("Cannot find method in\n" + codeSeq, ex);

        }

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

            return;

        }

        if (expRes.equals(ret)) {

            return;

        }

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

    }

}