Understanding the Callback

ScriptTimeoutJupiterTest.java

/*
 * (C) Copyright 2021 Boni Garcia (https://bonigarcia.github.io/)
 *
 * 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
 *
 *   http://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 io.github.bonigarcia.webdriver.jupiter.ch4.timeouts;

import static org.assertj.core.api.Assertions.assertThatThrownBy;

import java.time.Duration;

import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.openqa.selenium.JavascriptExecutor;
import org.openqa.selenium.ScriptTimeoutException;
import org.openqa.selenium.WebDriver;

import io.github.bonigarcia.wdm.WebDriverManager;

class ScriptTimeoutJupiterTest {

    WebDriver driver;

    @BeforeEach
    void setup() {
        driver = WebDriverManager.chromedriver().create();
    }

    @AfterEach
    void teardown() {
        driver.quit();
    }

    @Test
    void testScriptTimeout() {
        driver.get("https://bonigarcia.dev/selenium-webdriver-java/");
        JavascriptExecutor js = (JavascriptExecutor) driver;
        driver.manage().timeouts().scriptTimeout(Duration.ofSeconds(3));

        assertThatThrownBy(() -> {
            long waitMillis = Duration.ofSeconds(5).toMillis();
            String script =
                   "console.log(arguments);" +    //Understanding the arguments
                   "const callback = arguments[arguments.length - 1];" //Getting the last argument
                    + "window.setTimeout(callback, " + waitMillis + ");";
            js.executeAsyncScript(script);
        }).isInstanceOf(ScriptTimeoutException.class);

        try {
            Thread.sleep(60000);  //Sleeping for a minute so I can inspect
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

}