Utility classes in Selenium Java - Test Execution Trace

Test Overview

This test uses a utility class to open a browser, navigate to a page, and verify the page title. It checks that the utility class methods work correctly to simplify test steps.

Test Code - JUnit 5 with Selenium WebDriver

Selenium Java

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;

// Utility class for browser actions
class BrowserUtils {
    private WebDriver driver;

    public BrowserUtils() {
        System.setProperty("webdriver.chrome.driver", "path/to/chromedriver");
        this.driver = new ChromeDriver();
    }

    public void openUrl(String url) {
        driver.get(url);
    }

    public String getTitle() {
        return driver.getTitle();
    }

    public void closeBrowser() {
        if (driver != null) {
            driver.quit();
        }
    }

    public WebDriver getDriver() {
        return driver;
    }
}

public class UtilityClassTest {
    BrowserUtils browserUtils;

    @BeforeEach
    public void setUp() {
        browserUtils = new BrowserUtils();
    }

    @Test
    public void testPageTitle() {
        browserUtils.openUrl("https://example.com");
        String title = browserUtils.getTitle();
        assertEquals("Example Domain", title);
    }

    @AfterEach
    public void tearDown() {
        browserUtils.closeBrowser();
    }
}

Execution Trace - 5 Steps

Step	Action	System State	Assertion	Result
1	Test starts and BrowserUtils instance is created, launching Chrome browser	Chrome browser window opens, ready for commands	—	PASS
2	BrowserUtils opens URL 'https://example.com'	Browser navigates to https://example.com, page loads	—	PASS
3	BrowserUtils retrieves the page title	Page title is 'Example Domain'	Check if page title equals 'Example Domain'	PASS
4	JUnit assertion compares expected and actual title	Assertion verifies titles match	assertEquals('Example Domain', actualTitle)	PASS
5	BrowserUtils closes the browser	Chrome browser window closes	—	PASS

Failure Scenario

Failing Condition: Page title does not match expected 'Example Domain'

Execution Trace Quiz - 3 Questions

What does the utility class BrowserUtils do in this test?

A It opens the browser, navigates to a URL, gets the page title, and closes the browser

B It only verifies the page title without opening a browser

C It runs the test assertions directly

D It manages test data for the test

Key Result

Using utility classes helps keep test code clean and reusable by grouping common browser actions in one place.

Practice

1. What is the main purpose of a utility class in Selenium Java testing?

easy

A. To define test case steps in detail

B. To store test data in variables

C. To create WebDriver instances for each test

D. To provide reusable static methods for common tasks

Solution

1. Step 1: Understand utility class role

   Utility classes contain static methods to reuse code easily across tests.

2. Step 2: Compare options with utility class purpose

   Only To provide reusable static methods for common tasks describes reusable static methods, which is the utility class purpose.

3. Final Answer:

   To provide reusable static methods for common tasks -> Option D

4. Quick Check:

   Utility class = reusable static methods [OK]

Hint: Utility classes hold static helpers for reuse [OK]

Common Mistakes:

• Confusing utility class with test data storage
• Thinking utility class creates WebDriver instances
• Mixing utility class with test step definitions

2. Which of the following is the correct way to declare a utility method in Java?

easy

A. public static void openBrowser() {}

B. public void openBrowser() {}

C. void openBrowser() {}

D. static openBrowser() {}

Solution

1. Step 1: Recall utility method syntax

   Utility methods are static so they can be called without creating an object.

2. Step 2: Check each option's syntax

   public static void openBrowser() {} correctly declares a public static method with return type void.

3. Final Answer:

   public static void openBrowser() {} -> Option A

4. Quick Check:

   Utility method = public static method [OK]

Hint: Utility methods must be static for easy access [OK]

Common Mistakes:

• Omitting static keyword
• Missing return type
• Incorrect method declaration syntax

3. Given this utility method:

public static String getPageTitle(WebDriver driver) {
    return driver.getTitle();
}

What will be the output if the current page title is "Home Page"?

medium

A. Compilation error

B. null

C. "Home Page"

D. driver.getTitle()

Solution

1. Step 1: Understand method behavior

   The method returns the page title by calling driver.getTitle().

2. Step 2: Check given page title

   The page title is "Home Page", so the method returns this string.

3. Final Answer:

   "Home Page" -> Option C

4. Quick Check:

   Method returns page title string [OK]

Hint: Method returns driver.getTitle() string [OK]

Common Mistakes:

• Confusing method return with method name
• Expecting null instead of actual title
• Assuming syntax error without checking code

4. Identify the error in this utility class method:

public static void clickElement(WebElement element) {
    element.click;
}

medium

A. Missing parentheses after click method

B. WebElement cannot be passed as parameter

C. Method should return boolean

D. Static keyword is not allowed here

Solution

1. Step 1: Check method syntax

   The method calls element.click but misses parentheses, which is invalid syntax.

2. Step 2: Validate other options

   Passing WebElement is valid, return type void is fine, static allowed in utility methods.

3. Final Answer:

   Missing parentheses after click method -> Option A

4. Quick Check:

   Method call needs () after method name [OK]

Hint: Method calls need parentheses () [OK]

Common Mistakes:

• Forgetting parentheses on method calls
• Thinking WebElement can't be parameter
• Assuming static keyword causes error

5. You want to create a utility class method that waits for an element to be visible before clicking it. Which approach is best?

hard

A. Add wait logic inside each test instead of utility method

B. Create a static method that uses WebDriverWait and then clicks the element

C. Create a non-static method that clicks element immediately without wait

D. Use Thread.sleep() inside utility method before clicking

Solution

1. Step 1: Understand utility method purpose

   Utility methods should provide reusable, clean code for common tasks like waiting and clicking.

2. Step 2: Evaluate options for best practice

   Create a static method that uses WebDriverWait and then clicks the element uses static method with WebDriverWait, which is efficient and reusable. Others are less reliable or not reusable.

3. Final Answer:

   Create a static method that uses WebDriverWait and then clicks the element -> Option B

4. Quick Check:

   Use static method with explicit wait [OK]

Hint: Use static method with WebDriverWait for reliable clicks [OK]

Common Mistakes:

• Using Thread.sleep() causing slow tests
• Not using static method for utility
• Putting wait logic inside tests, not utility