Selenium WebDriver Case Studies & Practical Application 4

Question 1

A mobile-responsive website must be tested at viewport 375×812 (iPhone 14). How can a desktop Selenium test simulate this without a real device?

Accepted Answer

Use ChromeOptions to set '--window-size=375,812' and add a mobile emulation device metrics override

Answer

ChromeOptions mobile emulation overrides device metrics and user-agent, allowing Selenium to test responsive layouts on a desktop Chrome instance.

Question 2

A test automates a flight-booking site that uses dynamic IDs like 'btn_12849_submit'. Which locator strategy is most resilient to ID changes?

Accepted Answer

CSS selector targeting a stable attribute like [data-testid='submit-booking']

Answer

Targeting a stable data attribute (data-testid) decouples tests from auto-generated IDs that change on every build.

Question 3

A Selenium test must verify that a dashboard chart renders correctly. Since chart content is drawn on a <canvas> element, what is the best approach?

Accepted Answer

Take a screenshot and compare it pixel-by-pixel against a baseline image using a visual testing tool

Answer

Canvas content is not in the DOM, so visual (screenshot diff) testing tools like Applitools or Percy are the standard approach for canvas validation.

Question 4

Your CI pipeline must generate a test report that non-technical stakeholders can read. Which approach fits best with a Selenium/Java project?

Accepted Answer

Integrate Extent Reports or Allure to generate HTML reports with screenshots on failure

Answer

Extent Reports and Allure produce rich HTML reports with logs and embedded screenshots that are readable without technical background.

Question 5

A test scenario requires logging in as three different user roles (Admin, Editor, Viewer) to verify permissions. What is the most efficient Selenium approach?

Accepted Answer

Parameterize the test with a data provider, passing each role's credentials as a separate test run

Answer

Data-driven parameterization (TestNG @DataProvider or JUnit @ParameterizedTest) runs the same test logic against multiple credential sets without code duplication.

Selenium WebDriver Practice Test

Selenium WebDriver Practice Test

Selenium WebDriver Case Studies & Practical Application 4