Window management (maximize, size) in Selenium Java - Test Execution Trace

Test Overview

This test opens a browser window, maximizes it, and then verifies that the window size is larger than a predefined minimum size.

Test Code - JUnit with Selenium WebDriver

Selenium Java

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

public class WindowManagementTest {
    private WebDriver driver;

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

    @Test
    public void testWindowMaximizeAndSize() {
        driver.get("https://example.com");
        driver.manage().window().maximize();
        Dimension size = driver.manage().window().getSize();
        int width = size.getWidth();
        int height = size.getHeight();
        assertTrue(width >= 1024, "Window width should be at least 1024 pixels");
        assertTrue(height >= 768, "Window height should be at least 768 pixels");
    }

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

Execution Trace - 7 Steps

Step	Action	System State	Assertion	Result
1	Test starts and ChromeDriver is initialized	Browser is launched but no page loaded yet	—	PASS
2	Browser navigates to https://example.com	Browser displays the example.com homepage	—	PASS
3	Browser window is maximized using driver.manage().window().maximize()	Browser window is maximized to full screen	—	PASS
4	Retrieve current window size with driver.manage().window().getSize()	Window size object with width and height is obtained	—	PASS
5	Assert window width is at least 1024 pixels	Window width value is checked	assertTrue(width >= 1024)	PASS
6	Assert window height is at least 768 pixels	Window height value is checked	assertTrue(height >= 768)	PASS
7	Test ends and browser is closed with driver.quit()	Browser is closed and WebDriver session ends	—	PASS

Failure Scenario

Failing Condition: Window size after maximize is smaller than expected minimum (width < 1024 or height < 768)

Execution Trace Quiz - 3 Questions

What does the test verify after maximizing the browser window?

A That the window title contains 'example.com'

B That the page URL is correct

C That the window size is at least 1024x768 pixels

D That the browser is in fullscreen mode

Key Result

Always verify window size after maximizing to ensure your tests run in the expected viewport, as maximize behavior can vary by OS and browser.

Practice

1. What does the maximize() method do in Selenium WebDriver window management?

easy

A. It retrieves the current size of the browser window.

B. It makes the browser window fill the entire screen.

C. It sets the browser window to a custom size.

D. It closes the browser window.

Solution

1. Step 1: Understand the purpose of maximize()

   The maximize() method is used to enlarge the browser window to fill the entire screen.

2. Step 2: Differentiate from other window methods

   Unlike setSize() which sets a custom size, maximize() fills the screen automatically.

3. Final Answer:

   It makes the browser window fill the entire screen. -> Option B

4. Quick Check:

   maximize() = fills screen [OK]

Hint: maximize() fills the screen fully, setSize() sets custom size [OK]

Common Mistakes:

• Confusing maximize() with setSize()
• Thinking maximize() returns window size
• Assuming maximize() closes the window

2. Which of the following is the correct syntax to set the browser window size to 1024x768 in Selenium Java?

easy

A. driver.manage().window().maximize(1024, 768);

B. driver.window().setSize(1024, 768);

C. driver.setSize(1024, 768);

D. driver.manage().window().setSize(new Dimension(1024, 768));

Solution

1. Step 1: Recall correct method to set window size

   In Selenium Java, setSize() requires a Dimension object with width and height.

2. Step 2: Check syntax correctness

   driver.manage().window().setSize(new Dimension(1024, 768)); correctly uses driver.manage().window().setSize(new Dimension(1024, 768));. Other options misuse method names or parameters.

3. Final Answer:

   driver.manage().window().setSize(new Dimension(1024, 768)); -> Option D

4. Quick Check:

   setSize() needs Dimension object [OK]

Hint: Use new Dimension(width, height) inside setSize() [OK]

Common Mistakes:

• Calling maximize() with parameters
• Using setSize() without Dimension object
• Wrong method chaining like driver.window()

3. What will be the output of the following code snippet?

driver.manage().window().setSize(new Dimension(800, 600));
Dimension size = driver.manage().window().getSize();
System.out.println(size.getWidth() + "," + size.getHeight());

medium

A. 800,600

B. 600,800

C. 0,0

D. Throws a runtime exception

Solution

1. Step 1: Set window size to 800x600

   The code sets the browser window size to width=800 and height=600 using setSize().

2. Step 2: Retrieve and print the window size

   The getSize() method returns the current size, which is then printed as "width,height".

3. Final Answer:

   800,600 -> Option A

4. Quick Check:

   setSize(800,600) then getSize() = 800,600 [OK]

Hint: getSize() returns current size after setSize() [OK]

Common Mistakes:

• Mixing width and height order
• Expecting maximize() effect instead
• Assuming getSize() returns null or error

4. Identify the error in the following Selenium Java code snippet for setting window size:

driver.manage().window().setSize(1024, 768);

medium

A. The method name should be setWindowSize(), not setSize().

B. setSize() cannot be called on driver.manage().window().

C. setSize() requires a Dimension object, not two integers.

D. The code is correct and will run without errors.

Solution

1. Step 1: Check setSize() method parameters

   The setSize() method requires a single Dimension object, not two separate integers.

2. Step 2: Identify the error cause

   Passing two integers directly causes a compile-time error because no matching method exists.

3. Final Answer:

   setSize() requires a Dimension object, not two integers. -> Option C

4. Quick Check:

   setSize() needs Dimension object [OK]

Hint: Always wrap width and height in new Dimension() for setSize() [OK]

Common Mistakes:

• Passing width and height as separate arguments
• Using wrong method name
• Ignoring compile-time errors

5. You want to maximize the browser window and then verify if the window width is greater than 1200 pixels. Which code snippet correctly performs this check in Selenium Java?

hard

A. driver.manage().window().maximize();
Dimension size = driver.manage().window().getSize();
if (size.getWidth() > 1200) {
System.out.println("Width is greater than 1200");
}

B. driver.manage().window().setSize(new Dimension(1200, 800));
Dimension size = driver.manage().window().getSize();
if (size.getWidth() > 1200) {
System.out.println("Width is greater than 1200");
}

C. driver.manage().window().maximize(1200, 800);
Dimension size = driver.manage().window().getSize();
if (size.getWidth() > 1200) {
System.out.println("Width is greater than 1200");
}

D. driver.manage().window().maximize();
Dimension size = driver.manage().window().getSize();
if (size.getHeight() > 1200) {
System.out.println("Width is greater than 1200");
}

Solution

1. Step 1: Maximize the browser window

   Use maximize() without parameters to fill the screen.

2. Step 2: Get window size and check width

   Retrieve size with getSize() and compare width with 1200 pixels.

3. Step 3: Verify correctness of condition and output

   driver.manage().window().maximize(); Dimension size = driver.manage().window().getSize(); if (size.getWidth() > 1200) { System.out.println("Width is greater than 1200"); } correctly checks width > 1200 and prints the message.

4. Final Answer:

   Option A code snippet correctly maximizes and checks width. -> Option A

5. Quick Check:

   maximize() then getSize().getWidth() > 1200 [OK]

Hint: maximize() no params; getSize() then check width [OK]

Common Mistakes:

• Passing parameters to maximize()
• Checking height instead of width
• Using setSize() instead of maximize() for full screen