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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);

     }

 }