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 package org.netbeans.html.boot.impl;

 import java.io.Closeable;

 import java.lang.reflect.InvocationTargetException;

 import java.lang.reflect.Method;

 import java.lang.reflect.Modifier;

 import org.apidesign.html.boot.spi.Fn;

 import static org.testng.Assert.*;

 import org.testng.annotations.BeforeMethod;

 import org.testng.annotations.Test;

 /**

  *

  * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>

  */

 public class JsClassLoaderBase {

     protected static Class<?> methodClass;

     public JsClassLoaderBase() {

     }

     @BeforeMethod

     public void assertClassDefined() {

         assertNotNull(methodClass, "BeforeClass set up code should provide methodClass");

     }

     @Test public void noParamMethod() throws Throwable {

         Method plus = methodClass.getMethod("fortyTwo");

         try {

             final Object val = plus.invoke(null);

             assertTrue(val instanceof Number, "A number returned " + val);

             assertEquals(((Number)val).intValue(), 42);

         } catch (InvocationTargetException ex) {

             throw ex.getTargetException();

         }

     }

     @Test public void testExecuteScript() throws Throwable {

         Method plus = methodClass.getMethod("plus", int.class, int.class);

         try {

             assertEquals(plus.invoke(null, 10, 20), 30);

         } catch (InvocationTargetException ex) {

             throw ex.getTargetException();

         }

     }

     @Test public void overloadedMethod() throws Throwable {

         Method plus = methodClass.getMethod("plus", int.class);

         try {

             assertEquals(plus.invoke(null, 10), 10);

         } catch (InvocationTargetException ex) {

             throw ex.getTargetException();

         }

     }

     @Test public void instanceMethod() throws Throwable {

         Method plus = methodClass.getMethod("plusInst", int.class);

         Object inst = methodClass.newInstance();

         try {

             assertEquals(plus.invoke(inst, 10), 10);

         } catch (InvocationTargetException ex) {

             throw ex.getTargetException();

         }

     }

     @Test public void staticThis() throws Throwable {

         Method st = methodClass.getMethod("staticThis");

         try {

             assertNull(st.invoke(null));

         } catch (InvocationTargetException ex) {

             throw ex.getTargetException();

         }

     }

     @Test public void getThis() throws Throwable {

         Object th = methodClass.newInstance();

         Method st = methodClass.getMethod("getThis");

         try {

             assertEquals(st.invoke(th), th);

         } catch (InvocationTargetException ex) {

             throw ex.getTargetException();

         }

     }

     @Test public void truth() throws Throwable {

         Method st = methodClass.getMethod("truth");

         assertTrue((st.getModifiers() & Modifier.STATIC) != 0, "Is static");

         assertEquals(st.invoke(null), Boolean.TRUE, "Can return boolean");

     }

     @Test public void callback() throws Throwable {

         class R implements Runnable {

             int cnt;

             @Override

             public void run() {

                 cnt++;

             }

         }

         R r = new R();

         Method inc = methodClass.getMethod("callback", Runnable.class);

         inc.invoke(null, r);

         assertEquals(r.cnt, 1, "Callback happened");

     }

     @Test public void sumArray() throws Throwable {

         Method st = methodClass.getMethod("sumArr", int[].class);

         assertEquals(st.invoke(null, new int[] { 1, 2, 3 }), 6, "1+2+3 is six");

     }

     @Test public void javaScriptResource() throws Throwable {

         try {

             Method st = methodClass.getMethod("useExternalMul", int.class, int.class);

             assertEquals(st.invoke(null, 6, 7), 42, "Meaning of JavaScript?");

         } catch (InvocationTargetException ex) {

             throw ex.getTargetException();

         }

     }

     @Test public void callJavaScriptMethodOnOwnClass() throws Throwable {

         try {

             Object thiz = methodClass.newInstance();

             Method st = methodClass.getMethod("returnYourSelf", methodClass);

             assertEquals(st.invoke(null, thiz), thiz, "Returns this");

         } catch (InvocationTargetException ex) {

             throw ex.getTargetException();

         }

     }

     @Test public void callStaticJavaMethod() throws Throwable {

         Method st = methodClass.getMethod("staticCallback", int.class, int.class);

         assertEquals(st.invoke(null, 6, 7), 42, "Meaning of JavaScript?");

     }

     @Test public void callStaticStringParamMethod() throws Throwable {

         Method st = methodClass.getMethod("parseInt", String.class);

         assertEquals(st.invoke(null, "42"), 42, "Meaning of JavaScript?");

     }

     @Test public void firstLong() throws Throwable {

         Method st = methodClass.getMethod("chooseLong", boolean.class, boolean.class, long.class, long.class);

         assertEquals(st.invoke(null, true, false, 10, 20), 10L, "Take first value");

     }

     @Test public void secondLong() throws Throwable {

         Method st = methodClass.getMethod("chooseLong", boolean.class, boolean.class, long.class, long.class);

         assertEquals(st.invoke(null, false, true, 10, 20), 20L, "Take 2nd value");

     }

     @Test public void bothLong() throws Throwable {

         Method st = methodClass.getMethod("chooseLong", boolean.class, boolean.class, long.class, long.class);

         assertEquals(st.invoke(null, true, true, 10, 20), 30L, "Take both values");

     }

     @Test public void recordError() throws Throwable {

         Method st = methodClass.getMethod("recordError", Object.class);

         assertEquals(st.invoke(methodClass.newInstance(), "Hello"), "Hello", "The same parameter returned");

     }

     @Test public void plusOrMul() throws Throwable {

         Method st = methodClass.getMethod("plusOrMul", int.class, int.class);

         assertNotNull(Fn.activePresenter(), "Is there a presenter?");

         Closeable c = Fn.activate(null);

         try {

             assertNull(Fn.activePresenter(), "No presenter now");

             assertEquals(st.invoke(null, 6, 7), 42, "Mul in Java");

         } finally {

             c.close();

         }

         assertNotNull(Fn.activePresenter(), "Is there a presenter again");

         assertEquals(st.invoke(null, 6, 7), 13, "Plus in JavaScript");

         c = Fn.activate(null);

         try {

             assertNull(Fn.activePresenter(), "No presenter again");

             assertEquals(st.invoke(null, 6, 7), 42, "Mul in Java");

         } finally {

             c.close();

         }

         assertNotNull(Fn.activePresenter(), "Is there a presenter again");

         assertEquals(st.invoke(null, 6, 7), 13, "Plus in JavaScript again");

     }

     @Test public void arrayInOut() throws Throwable {

         String[] arr = { "Ahoj" };

         Method st = methodClass.getMethod("arr", Object[].class);

         Object ret = st.invoke(null, (Object) arr);

         assertTrue(ret instanceof Object[], "Expecting array: " + ret);

         Object[] res = (Object[]) ret;

         assertEquals(res.length, 1, "One element");

         assertEquals(res[0], "Ahoj", "The right string");

     }

 }