Why selector mastery prevents fragile tests in Selenium Java - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to find an element by its unique ID using Selenium in Java.

Selenium Java

WebElement element = driver.findElement(By.[1]("submit-button"));

Drag options to blanks, or click blank then click option'

AlinkText

BclassName

CtagName

Did

Attempts:

3 left

💡 Hint

Common Mistakes

Using By.className when the ID is available

Using By.tagName which is too broad

Using By.linkText for non-link elements

Using By.id is the most reliable way to locate an element with a unique ID, which helps prevent fragile tests.

2fill in blank

medium

Complete the code to locate an element using a CSS selector that targets a button with class 'btn-primary'.

Selenium Java

WebElement button = driver.findElement(By.[1]("button.btn-primary"));

Drag options to blanks, or click blank then click option'

Axpath

BcssSelector

Cid

Dname

Attempts:

3 left

💡 Hint

Common Mistakes

Using By.id when no ID exists

Using By.name which may not be unique

Using By.xpath unnecessarily for simple selectors

Using By.cssSelector with 'button.btn-primary' targets a button element with the class 'btn-primary', which is precise and less fragile.

3fill in blank

hard

Fix the error in the XPath selector to find a link with text 'Home'.

Selenium Java

WebElement homeLink = driver.findElement(By.xpath("//a[[1]='Home']"));

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Avalue

BinnerText

Ctext()

Dname

Attempts:

3 left

💡 Hint

Common Mistakes

Using innerText or value instead of text()

Using name attribute which may not exist

Forgetting to use quotes around 'Home'

XPath uses the function text() to match the visible text of an element. Using 'text()' correctly locates the link with text 'Home'.

4fill in blank

hard

Fill both blanks to create a CSS selector that finds an input element with type 'checkbox' and name 'subscribe'.

Selenium Java

WebElement checkbox = driver.findElement(By.cssSelector("input[1][[2]='subscribe']"));

Drag options to blanks, or click blank then click option'

A[type='checkbox']

Bname

Ctype

D.checkbox

Attempts:

3 left

💡 Hint

Common Mistakes

Using .checkbox which selects by class, not attribute

Swapping 'type' and 'name' in the selector

Omitting the attribute selector syntax

The selector input[type='checkbox'][name='subscribe'] correctly targets the checkbox input with the specified name attribute.

5fill in blank

hard

Fill all three blanks to create a Java Selenium code snippet that finds all visible buttons with class 'action' and asserts the count is 3.

Selenium Java

List<WebElement> buttons = driver.findElements(By.[1]("button.action"));
int visibleCount = 0;
for (WebElement btn : buttons) {
    if (btn.is[2]()) {
        visibleCount[3];
    }
}
assertEquals(3, visibleCount);

Drag options to blanks, or click blank then click option'

AcssSelector

BDisplayed

C++

Dxpath

Attempts:

3 left

💡 Hint

Common Mistakes

Using xpath unnecessarily for simple selectors

Using isEnabled() instead of isDisplayed() for visibility

Forgetting to increment the counter

Using By.cssSelector to find buttons with class 'action', checking visibility with isDisplayed(), and incrementing visibleCount with ++ correctly counts visible buttons.