Getting and setting attributes in Selenium Java

Introduction

We get and set attributes to check or change properties of web elements during tests. This helps us verify the page works as expected.

Check if a button is disabled before clicking it.

Verify the placeholder text in an input box.

Change the value of an input field before submitting a form.

Confirm the href link of an anchor tag.

Update an element's attribute to simulate user interaction.

Syntax

Selenium Java

String value = element.getAttribute("attributeName");
// element.setAttribute("attributeName", "newValue"); // Note: setAttribute is not directly available in Selenium WebDriver

In Selenium WebDriver, getAttribute is used to read an attribute's value.

There is no direct setAttribute method in Selenium WebDriver; to set attributes, you use JavaScript execution.

Examples

Gets the placeholder text from an input field.

Selenium Java

String placeholder = inputElement.getAttribute("placeholder");

Gets the URL from a link's href attribute.

Selenium Java

String href = linkElement.getAttribute("href");

Sets the value attribute of an input field using JavaScript.

Selenium Java

JavascriptExecutor js = (JavascriptExecutor) driver;
js.executeScript("arguments[0].setAttribute('value', 'new text')", inputElement);

Sample Program

This test opens a page, reads the placeholder text of an input box, sets a new value using JavaScript, then reads the value to confirm the change.

Selenium Java

import org.openqa.selenium.By;
import org.openqa.selenium.JavascriptExecutor;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;

public class AttributeTest {
    public static void main(String[] args) {
        System.setProperty("webdriver.chrome.driver", "path/to/chromedriver");
        WebDriver driver = new ChromeDriver();
        try {
            driver.get("https://example.com/form");

            WebElement input = driver.findElement(By.id("username"));

            // Get placeholder attribute
            String placeholder = input.getAttribute("placeholder");
            System.out.println("Placeholder before: " + placeholder);

            // Set value attribute using JavaScript
            JavascriptExecutor js = (JavascriptExecutor) driver;
            js.executeScript("arguments[0].setAttribute('value', 'testuser')", input);

            // Get value attribute after setting
            String value = input.getAttribute("value");
            System.out.println("Value after setting: " + value);

        } finally {
            driver.quit();
        }
    }
}

Important Notes

Always prefer getAttribute to check element properties instead of reading visible text when testing attributes.

To change attributes, use JavaScript execution because Selenium WebDriver does not provide a direct method.

Remember to close the browser with driver.quit() to free resources.

Summary

Get attributes to verify element properties.

Set attributes using JavaScript execution in Selenium.

Use these to simulate user input and check element states in tests.

Practice

1. What is the primary method to get an attribute value of a web element in Selenium Java?

easy

A. Using driver.getAttribute("attributeName")

B. Using element.setAttribute("attributeName")

C. Using element.getText()

D. Using element.getAttribute("attributeName")

Solution

1. Step 1: Understand the method to retrieve attribute

   In Selenium Java, getAttribute is used on a WebElement to fetch the value of an attribute.

2. Step 2: Identify correct usage

   The syntax is element.getAttribute("attributeName"), which returns the attribute's value as a string.

3. Final Answer:

   Using element.getAttribute("attributeName") -> Option D

4. Quick Check:

   Get attribute = element.getAttribute("attributeName") [OK]

Hint: Remember: getAttribute reads, setAttribute does not exist directly [OK]

Common Mistakes:

• Confusing getAttribute with setAttribute
• Trying to use driver.getAttribute instead of element.getAttribute
• Using getText() to get attribute values

2. Which of the following is the correct way to set an attribute value of a web element in Selenium Java?

easy

A. Using JavaScriptExecutor to run arguments[0].setAttribute('value', 'newValue')

B. element.setAttribute("value", "newValue")

C. element.getAttribute("value") = "newValue"

D. element.setValue("newValue")

Solution

1. Step 1: Understand Selenium's limitation on setting attributes

   Selenium WebElement does not have a direct setAttribute method.

2. Step 2: Use JavaScriptExecutor to set attribute

   We use JavaScriptExecutor to run JavaScript code that sets the attribute, e.g., arguments[0].setAttribute('value', 'newValue').

3. Final Answer:

   Using JavaScriptExecutor to run arguments[0].setAttribute('value', 'newValue') -> Option A

4. Quick Check:

   Set attribute = JavaScriptExecutor + setAttribute() [OK]

Hint: Set attributes via JavaScriptExecutor, not WebElement methods [OK]

Common Mistakes:

• Trying to call setAttribute directly on WebElement
• Assigning value to getAttribute() result
• Using non-existent setValue() method

3. Consider the following Selenium Java code snippet:

WebElement input = driver.findElement(By.id("username"));
String value = input.getAttribute("value");
System.out.println(value);

If the input field has value="testUser", what will be printed?

medium

A. testUser

B. null

C. value

D. username

Solution

1. Step 1: Identify the attribute being fetched

   The code calls getAttribute("value") on the input element, which returns the current value attribute.

2. Step 2: Match attribute value with output

   The input field has value="testUser", so value variable will be "testUser" and printed.

3. Final Answer:

   testUser -> Option A

4. Quick Check:

   getAttribute("value") = "testUser" [OK]

Hint: getAttribute returns actual attribute value, not element text [OK]

Common Mistakes:

• Confusing getAttribute("value") with getText()
• Expecting attribute name instead of value
• Assuming null if attribute exists

4. You want to set the attribute placeholder of an input element to "Enter name" using Selenium Java. Which code snippet fixes the error below?

// Current code
WebElement input = driver.findElement(By.id("name"));
input.setAttribute("placeholder", "Enter name"); // Error: cannot find symbol

medium

A. Use input.sendKeys("Enter name")

B. Replace with input.getAttribute("placeholder") = "Enter name";

C. Use JavaScriptExecutor: js.executeScript("arguments[0].setAttribute('placeholder', 'Enter name')", input);

D. Use input.setValue("Enter name")

Solution

1. Step 1: Identify why error occurs

   WebElement does not have a setAttribute method, so calling it causes a compile error.

2. Step 2: Use JavaScriptExecutor to set attribute

   JavaScriptExecutor can run JavaScript to set attributes on elements, e.g., arguments[0].setAttribute('placeholder', 'Enter name').

3. Final Answer:

   Use JavaScriptExecutor: js.executeScript("arguments[0].setAttribute('placeholder', 'Enter name')", input); -> Option C

4. Quick Check:

   Set attribute via JSExecutor = Use JavaScriptExecutor: js.executeScript("arguments[0].setAttribute('placeholder', 'Enter name')", input); [OK]

Hint: Set attributes only via JavaScriptExecutor, not WebElement methods [OK]

Common Mistakes:

• Trying to assign value to getAttribute()
• Using non-existent setValue() method
• Using sendKeys() which inputs text, not sets attribute

5. You want to verify if a checkbox is checked by reading its checked attribute using Selenium Java. Which approach correctly checks this and sets it checked if not already?

WebElement checkbox = driver.findElement(By.id("agree"));
String checked = checkbox.getAttribute("checked");
if (checked == null) {
    // Set checked attribute here
}

hard

A. Use checkbox.setAttribute("checked", "true")

B. Use JavaScriptExecutor: js.executeScript("arguments[0].setAttribute('checked', 'true')", checkbox);

C. Use checkbox.click() to check the box

D. Use checkbox.getAttribute("checked") = "true"

Solution

1. Step 1: Check if checkbox is checked by reading 'checked' attribute

   If getAttribute("checked") returns null, checkbox is not checked.

2. Step 2: Set 'checked' attribute using JavaScriptExecutor

   Since WebElement has no setAttribute, use JavaScriptExecutor to set checked attribute to "true".

3. Final Answer:

   Use JavaScriptExecutor: js.executeScript("arguments[0].setAttribute('checked', 'true')", checkbox); -> Option B

4. Quick Check:

   Set attribute via JSExecutor = Use JavaScriptExecutor: js.executeScript("arguments[0].setAttribute('checked', 'true')", checkbox); [OK]

Hint: Check attribute with getAttribute; set with JSExecutor [OK]

Common Mistakes:

• Trying to call setAttribute directly on WebElement
• Using assignment on getAttribute() result
• Using click() which toggles but does not set attribute directly