BeforeUnloadEventTest

/*
 * Copyright (c) 2002-2025 Gargoyle Software Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.htmlunit.javascript.host.event;

import org.htmlunit.WebDriverTestCase;
import org.htmlunit.junit.BrowserRunner;
import org.htmlunit.junit.annotation.Alerts;
import org.junit.Test;
import org.junit.runner.RunWith;

/**
 * Tests for {@link BeforeUnloadEvent}.
 *
 * @author Frank Danek
 * @author Ronald Brill
 */
@RunWith(BrowserRunner.class)
public class BeforeUnloadEventTest extends WebDriverTestCase {

    private static final String DUMP_EVENT_FUNCTION = "  function dump(event) {\n"
        + "    if (event) {\n"
        + "      log(event);\n"
        + "      log(event.type);\n"
        + "      log(event.bubbles);\n"
        + "      log(event.cancelable);\n"
        + "      log(event.composed);\n"
        + "      log(event.returnValue);\n"
        + "    } else {\n"
        + "      log('no event');\n"
        + "    }\n"
        + "  }\n";

    /**
     * @throws Exception if the test fails
     */
    @Test
    @Alerts("TypeError")
    public void create_ctor() throws Exception {
        final String html = DOCTYPE_HTML
            + "<html><head><script>\n"
            + LOG_TITLE_FUNCTION
            + "  function test() {\n"
            + "    try {\n"
            + "      var event = new BeforeUnloadEvent('beforeunload');\n"
            + "    } catch(e) { logEx(e) }\n"
            + "  }\n"
            + "</script></head><body onload='test()'>\n"
            + "</body></html>";

        loadPageVerifyTitle2(html);
    }

    /**
     * @throws Exception if the test fails
     */
    @Test
    @Alerts({"[object BeforeUnloadEvent]", "", "false", "false", "false", ""})
    public void create_createEvent() throws Exception {
        final String html = DOCTYPE_HTML
            + "<html><head><script>\n"
            + LOG_TITLE_FUNCTION
            + "  function test() {\n"
            + "    try {\n"
            + "      var event = document.createEvent('BeforeUnloadEvent');\n"
            + "      dump(event);\n"
            + "    } catch(e) { logEx(e); }\n"
            + "  }\n"
            + DUMP_EVENT_FUNCTION
            + "</script></head><body onload='test()'>\n"
            + "</body></html>";

        loadPageVerifyTitle2(html);
    }

    /**
     * @throws Exception if the test fails
     */
    @Test
    @Alerts({"[object BeforeUnloadEvent]", "beforeunload", "true", "false", "false", ""})
    public void initEvent() throws Exception {
        final String html = DOCTYPE_HTML
            + "<html><head><script>\n"
            + LOG_TITLE_FUNCTION
            + "  function test() {\n"
            + "    try {\n"
            + "      var event = document.createEvent('BeforeUnloadEvent');\n"
            + "      event.initEvent('beforeunload', true, false);\n"
            + "      dump(event);\n"
            + "    } catch(e) { logEx(e) }\n"
            + "  }\n"
            + DUMP_EVENT_FUNCTION
            + "</script></head><body onload='test()'>\n"
            + "</body></html>";

        loadPageVerifyTitle2(html);
    }

    /**
     * @throws Exception if the test fails
     */
    @Test
    @Alerts({"[object BeforeUnloadEvent]", "beforeunload", "true", "false", "false", ""})
    public void dispatchEvent() throws Exception {
        final String html = DOCTYPE_HTML
            + "<html><head><script>\n"
            + LOG_TITLE_FUNCTION
            + "  function test() {\n"
            + "    try {\n"
            + "      var event = document.createEvent('BeforeUnloadEvent');\n"
            + "      event.initEvent('beforeunload', true, false);\n"
            + "      dispatchEvent(event);\n"
            + "    } catch(e) { logEx(e); }\n"
            + "  }\n"
            + DUMP_EVENT_FUNCTION
            + "  window.onbeforeunload  = dump;\n"
            + "</script></head><body onload='test()'>\n"
            + "</body></html>";

        loadPageVerifyTitle2(html);
    }

    /**
     * @throws Exception if the test fails
     */
    @Test
    @Alerts({"[object Event]", "beforeunload", "true", "false", "false", "true"})
    public void dispatchEvent_event() throws Exception {
        final String html = DOCTYPE_HTML
            + "<html><head><script>\n"
            + LOG_TITLE_FUNCTION
            + "  function test() {\n"
            + "    try {\n"
            + "      var event = document.createEvent('Event');\n"
            + "      event.initEvent('beforeunload', true, false);\n"
            + "      dispatchEvent(event);\n"
            + "    } catch(e) { logEx(e); }\n"
            + "  }\n"
            + DUMP_EVENT_FUNCTION
            + "  window.onbeforeunload = dump;\n"
            + "</script></head><body onload='test()'>\n"
            + "</body></html>";

        loadPageVerifyTitle2(html);
    }

    /**
     * @throws Exception if the test fails
     */
    @Test
    @Alerts("supported")
    public void onBeforeUnload_supported() throws Exception {
        final String html = DOCTYPE_HTML
            + "<html><head><script>\n"
            + LOG_TITLE_FUNCTION
            + "  function test() {\n"
            + "    if ('onbeforeunload' in window) { log('supported') }\n"
            + "  }\n"
            + "</script></head><body onload='test()'>\n"
            + "</body></html>";

        loadPageVerifyTitle2(html);
    }
}