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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 InstanceTest {

    @Test public void verifyDefaultDoubleValue() throws Exception {

        assertExec(

            "Will be zero",

            "org_apidesign_vm4brwsr_Instance_defaultDblValueD",

            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

        );

    }

    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/Instance"

        );

        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);

    }

}