WebDriverManager for automatic driver management in Selenium Java - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

Output of WebDriverManager setup code

What will be the output when running this Selenium Java code snippet using WebDriverManager?

Selenium Java

import io.github.bonigarcia.wdm.WebDriverManager;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;

public class Test {
    public static void main(String[] args) {
        WebDriverManager.chromedriver().setup();
        WebDriver driver = new ChromeDriver();
        driver.get("https://example.com");
        System.out.println(driver.getTitle());
        driver.quit();
    }
}

A Prints an empty string and keeps the browser open

B Throws IllegalStateException because driver executable path is not set

C Throws NullPointerException when calling getTitle()

D Prints the title of https://example.com and closes the browser without errors

💡 Hint

WebDriverManager automatically downloads and sets the driver executable path.

WebDriverManager.chromedriver().setup() downloads the correct ChromeDriver and sets the system property. Then ChromeDriver launches the browser, navigates to the URL, and getTitle() returns the page title. No exceptions occur.

❓ assertion

intermediate

Correct assertion to verify page title with WebDriverManager

Which assertion correctly verifies that the page title is exactly "Example Domain" after navigating using WebDriverManager and Selenium?

Selenium Java

WebDriverManager.chromedriver().setup();
WebDriver driver = new ChromeDriver();
driver.get("https://example.com");
String title = driver.getTitle();
// Which assertion below is correct?

A assertNotNull(title);

B assertTrue(title.contains("Example Domain"));

C assertEquals("Example Domain", title);

D assertFalse(title.isEmpty());

💡 Hint

Exact match is required, not just containment or non-null.

assertEquals("Example Domain", title) checks that the title exactly matches the expected string. Other assertions are weaker or less precise.

🔧 Debug

advanced

Identify the error in WebDriverManager usage

What error will occur when running this code snippet?

Selenium Java

import io.github.bonigarcia.wdm.WebDriverManager;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;

public class Test {
    public static void main(String[] args) {
        WebDriverManager.chromedriver();
        WebDriver driver = new ChromeDriver();
        driver.get("https://example.com");
        System.out.println(driver.getTitle());
        driver.quit();
    }
}

A IllegalStateException because driver executable path is not set

B No error; code runs and prints the title

C NullPointerException when calling getTitle()

D Compilation error due to missing import

💡 Hint

Check if WebDriverManager setup() method is called.

WebDriverManager.chromedriver() alone does not set up the driver. The setup() method must be called to download and set the driver path. Without it, ChromeDriver throws IllegalStateException.

🧠 Conceptual

advanced

Why use WebDriverManager in Selenium tests?

Which is the main advantage of using WebDriverManager for driver management in Selenium tests?

A It replaces the need for Selenium WebDriver API

B It automatically downloads and configures the correct browser driver version

C It provides a GUI to run Selenium tests

D It speeds up browser rendering during tests

💡 Hint

Think about driver executable management.

WebDriverManager automates downloading and setting the correct driver executable version, avoiding manual setup and version mismatch errors.

❓ framework

expert

Best practice for integrating WebDriverManager in JUnit 5 tests

Which code snippet correctly integrates WebDriverManager setup in a JUnit 5 test class to ensure the driver is ready before tests run?

Selenium Java

import io.github.bonigarcia.wdm.WebDriverManager;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;

public class SeleniumTest {
    static WebDriver driver;

    // Where to put WebDriverManager setup?

    @Test
    public void testTitle() {
        driver = new ChromeDriver();
        driver.get("https://example.com");
        System.out.println(driver.getTitle());
        driver.quit();
    }
}

A

@BeforeAll
public static void setup() {
    WebDriverManager.chromedriver().setup();
}

B Inside testTitle() method before creating ChromeDriver instance

C In a constructor of SeleniumTest class

D No setup needed; WebDriverManager works automatically

💡 Hint

Setup should run once before all tests.

Using @BeforeAll static method ensures WebDriverManager sets up the driver once before any tests run, avoiding repeated setup or errors.

Practice

1. What is the main purpose of using WebDriverManager in Selenium Java tests?

easy

A. To automatically download and manage browser drivers

B. To write test assertions easily

C. To create test reports

D. To locate web elements on a page

Solution

1. Step 1: Understand WebDriverManager's role

   WebDriverManager automates the setup of browser drivers needed for Selenium tests.

2. Step 2: Compare with other options

   Options A, B, and C relate to other Selenium tasks, not driver management.

3. Final Answer:

   To automatically download and manage browser drivers -> Option A

4. Quick Check:

   WebDriverManager = automatic driver setup [OK]

Hint: WebDriverManager handles drivers, not test logic or reports [OK]

Common Mistakes:

• Confusing driver management with test assertions
• Thinking it creates test reports
• Assuming it locates web elements

2. Which of the following is the correct syntax to setup ChromeDriver using WebDriverManager in Java?

easy

A. WebDriverManager.setup.chromedriver();

B. WebDriverManager().chromedriver.setup();

C. WebDriverManager.chromeDriver.setup();

D. WebDriverManager.chromedriver().setup();

Solution

1. Step 1: Recall WebDriverManager syntax

   The correct method call is WebDriverManager.chromedriver().setup(); to setup ChromeDriver.

2. Step 2: Identify syntax errors in other options

   Options A, C, and D have incorrect method chaining or casing.

3. Final Answer:

   WebDriverManager.chromedriver().setup(); -> Option D

4. Quick Check:

   Correct method chaining = WebDriverManager.chromedriver().setup(); [OK]

Hint: Remember: WebDriverManager.browsername().setup() [OK]

Common Mistakes:

• Incorrect method chaining order
• Wrong capitalization of 'chromedriver'
• Using parentheses incorrectly

3. What will happen when the following code runs?

WebDriverManager.firefoxdriver().setup();
WebDriver driver = new FirefoxDriver();
driver.get("https://example.com");
System.out.println(driver.getTitle());

medium

A. It opens Firefox, navigates to example.com, and prints the page title

B. It throws a runtime error due to missing driver setup

C. It opens Chrome instead of Firefox

D. It compiles but does not open any browser

Solution

1. Step 1: Analyze WebDriverManager usage

   The code calls WebDriverManager.firefoxdriver().setup(); which downloads and sets up FirefoxDriver automatically.

2. Step 2: Check driver creation and navigation

   Then it creates a FirefoxDriver instance, opens the URL, and prints the page title.

3. Final Answer:

   It opens Firefox, navigates to example.com, and prints the page title -> Option A

4. Quick Check:

   Setup + FirefoxDriver + getTitle() = It opens Firefox, navigates to example.com, and prints the page title [OK]

Hint: Setup driver first, then create driver instance [OK]

Common Mistakes:

• Assuming driver setup is manual and missing
• Confusing FirefoxDriver with ChromeDriver
• Expecting no browser to open

4. Identify the error in this code snippet using WebDriverManager:

WebDriverManager.chromedriver.setup();
WebDriver driver = new ChromeDriver();

medium

A. WebDriverManager cannot setup ChromeDriver

B. Missing parentheses after chromedriver() method

C. ChromeDriver class is not imported

D. No error, code is correct

Solution

1. Step 1: Check WebDriverManager method call

   The method chromedriver must be called with parentheses: chromedriver().

2. Step 2: Verify other options

   ChromeDriver class is not imported might be true but is not shown in snippet; WebDriverManager cannot setup ChromeDriver is false because WebDriverManager supports ChromeDriver; No error, code is correct is incorrect due to syntax error.

3. Final Answer:

   Missing parentheses after chromedriver() method -> Option B

4. Quick Check:

   Method calls need parentheses [OK]

Hint: Method calls always need () in Java [OK]

Common Mistakes:

• Omitting parentheses on method calls
• Assuming WebDriverManager can't setup ChromeDriver
• Ignoring import statements

5. You want to run Selenium tests on multiple browsers without manually downloading drivers. Which WebDriverManager feature helps achieve this efficiently?

hard

A. Writing custom driver download scripts

B. Manual driver path configuration in system properties

C. Automatic detection and download of required driver versions

D. Using deprecated driver executables

Solution

1. Step 1: Understand the problem

   Running tests on multiple browsers requires managing different drivers automatically.

2. Step 2: Identify WebDriverManager feature

   WebDriverManager automatically detects browser version and downloads matching drivers, avoiding manual setup.

3. Final Answer:

   Automatic detection and download of required driver versions -> Option C

4. Quick Check:

   Auto driver management = Automatic detection and download of required driver versions [OK]

Hint: Auto-download drivers for all browsers with WebDriverManager [OK]

Common Mistakes:

• Thinking manual config is needed
• Trying to write custom scripts unnecessarily
• Using outdated driver files