Executing JavaScript in Selenium Java - Test Execution Trace

Test Overview

This test opens a web page, executes JavaScript to change the page title, and verifies the title was updated correctly.

Test Code - JUnit with Selenium WebDriver

Selenium Java

import org.openqa.selenium.JavascriptExecutor;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;

public class ExecuteJavaScriptTest {
    private WebDriver driver;

    @BeforeEach
    public void setUp() {
        driver = new ChromeDriver();
    }

    @AfterEach
    public void tearDown() {
        if (driver != null) {
            driver.quit();
        }
    }

    @Test
    public void testChangeTitleWithJavaScript() {
        driver.get("https://example.com");
        JavascriptExecutor js = (JavascriptExecutor) driver;
        js.executeScript("document.title = 'New Title';");
        String title = driver.getTitle();
        assertEquals("New Title", title);
    }
}

Execution Trace - 5 Steps

Step	Action	System State	Assertion	Result
1	Test starts and Chrome browser opens	Browser window is open but no page loaded yet	-	PASS
2	Navigates to https://example.com	Page https://example.com is loaded with default title 'Example Domain'	-	PASS
3	Executes JavaScript to change document title to 'New Title'	Page title is now 'New Title'	-	PASS
4	Retrieves the page title using driver.getTitle()	Page title retrieved as 'New Title'	Check if title equals 'New Title'	PASS
5	Test ends and browser closes	Browser window closed	-	PASS

Failure Scenario

Failing Condition: JavaScript execution fails or title does not update as expected

Execution Trace Quiz - 3 Questions

What does the JavaScript code in this test do?

A Fills a form input

B Changes the page title to 'New Title'

C Clicks a button on the page

D Reloads the page

Key Result

Use JavascriptExecutor in Selenium to run JavaScript code directly in the browser when standard WebDriver methods cannot perform the needed action.