/**

 * Back 2 Browser Bytecode Translator

 * Copyright (C) 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.bck2brwsr.vmtest.impl;

import org.apidesign.bck2brwsr.core.JavaScriptBody;

import org.apidesign.bck2brwsr.vmtest.BrwsrTest;

import org.apidesign.bck2brwsr.vmtest.VMTest;

import org.testng.annotations.Factory;

/** Verify cooperation with net.java.html.js annotations.

 *

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

 */

public class HtmlAnnotationsTest {

    static int firstCheck;

    private void assertMulNotDefinedForTheFirstTime() {

        if (firstCheck++ == 0) {

            Object mul = windowMul();

            assert mul == null : "htmlannotations.js should not be processed before first call to HtmlAnnotations class";

        }

    }

    @BrwsrTest public void fourtyTwo() throws Exception {

        assertMulNotDefinedForTheFirstTime();

        assertEquals(HtmlAnnotations.fourtyTwo(), 42);

    }

    @BrwsrTest public void externalMul() throws Exception {

        assertMulNotDefinedForTheFirstTime();

        assertEquals(HtmlAnnotations.useExternalMul(7, 6), 42);

    }

    @BrwsrTest public void callRunnableFromJS() throws Exception {

        assertMulNotDefinedForTheFirstTime();

        assertEquals(HtmlAnnotations.callback(), 1);

    }

    @BrwsrTest public void callStaticMethodFromJS() throws Exception {

        assertMulNotDefinedForTheFirstTime();

        assertEquals(HtmlAnnotations.staticCallback(), 1);

    }

    @BrwsrTest public void callbackWithFourParamsAndReturnType() throws Exception {

        assertMulNotDefinedForTheFirstTime();

        Object instance = HtmlAnnotations.create();

        assertNotNull(instance, "Instance created");

        assertEquals(HtmlAnnotations.first(instance, 42, 31), 42);

    }

    @BrwsrTest public void callbackWithObjectParamsAndReturnType() throws Exception {

        assertMulNotDefinedForTheFirstTime();

        Object instance = HtmlAnnotations.create();

        assertNotNull(instance, "Instance created");

        assertEquals(HtmlAnnotations.onError(instance, 42.0), 42.0);

    }

    private static void assertEquals(double real, double exp) {

        if (real - exp < 0.01) {

            return;

        }

        assert false : "Expecting " + exp + " but was " + real;

    }

    private static void assertNotNull(Object obj, String msg) {

        assert obj != null : msg;

    }

    @JavaScriptBody(args = {}, body = "return window.mul ? window.mul : null;")

    private static native Object windowMul();

    @Factory public static Object[] create() {

        return VMTest.create(HtmlAnnotationsTest.class);

    }

}