Hiring guide for Capybara (web testing framework) Engineers

Capybara (web testing framework) Developer Hiring Guide

Capybara is a web-based testing framework that simulates how a user interacts with your application. It is written in the Ruby programming language and integrates seamlessly with popular testing frameworks like RSpec, Cucumber, Test::Unit, and Minitest. Capybara helps you test web applications by simulating how a real user would interact with your app. It can handle complex actions such as filling out forms or clicking buttons and links, making it an essential tool for behavior-driven development (BDD) and acceptance testing. Capybara supports multiple web drivers like Selenium, Rack-Test, and Webkit to simulate browser interactions.

Ask the right questions secure the right Capybara (web testing framework) talent among an increasingly shrinking pool of talent.

First 20 minutes

General Capybara (web testing framework) app knowledge and experience

The first 20 minutes of the interview should seek to understand the candidate's general background in Capybara (web testing framework) application development, including their experience with various programming languages, databases, and their approach to designing scalable and maintainable systems.

How would you install Capybara?
You can install Capybara by adding 'gem capybara' to your Gemfile and running 'bundle install'.
What are the main features of Capybara?
Capybara provides a high-level API to interact with web-based applications. It supports multiple drivers, handles asynchronous JavaScript, and can match on page content.
How would you use Capybara to fill in a form?
You can use the 'fill_in' method to fill in a form. For example, 'fill_in 'Name', with: 'John Doe''.
What are the different drivers available in Capybara?
Capybara supports several drivers such as Rack::Test, Selenium, and Capybara-WebKit.
Describe the difference between 'find' and 'first' methods in Capybara.
'Find' will raise an error if the element is not found, while 'first' will return nil.
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What you’re looking for early on

Does the candidate have a solid understanding of Capybara and its applications?
Has the candidate demonstrated problem-solving skills?
Is the candidate familiar with Ruby, the language that Capybara is written in?
Has the candidate shown an ability to work as part of a team?

Next 20 minutes

Specific Capybara (web testing framework) development questions

The next 20 minutes of the interview should focus on the candidate's expertise with specific backend frameworks, their understanding of RESTful APIs, and their experience in handling data storage and retrieval efficiently.

How would you handle asynchronous JavaScript with Capybara?
Capybara has built-in support for asynchronous JavaScript, it will automatically wait for AJAX requests to complete.
What is the use of 'within' method in Capybara?
'Within' method is used to scope the interaction with the page to a specific element.
How would you use Capybara to test a JavaScript alert?
You can use the 'accept_alert' method to test a JavaScript alert. For example, 'accept_alert do click_link 'Show Alert' end'.
What are the different ways to navigate to a page in Capybara?
You can use 'visit' to navigate to a specific URL, or 'click_link' to navigate via a link.
Describe the difference between 'have_content' and 'have_text' matchers in Capybara.
'Have_content' and 'have_text' are essentially the same, they both check if the page or element has the specified text.
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The ideal back-end app developer

What you’re looking to see on the Capybara (web testing framework) engineer at this point.

At this point, a skilled Capybara (web testing framework) engineer should demonstrate strong problem-solving abilities, proficiency in Capybara (web testing framework) programming language, and knowledge of software development methodologies. Red flags include lack of hands-on experience, inability to articulate complex concepts, or unfamiliarity with standard coding practices.

Digging deeper

Code questions

These will help you see the candidate's real-world development capabilities with Capybara (web testing framework).

What does the following Capybara code do?
visit '/login'
fill_in 'Username', with: 'user1'
fill_in 'Password', with: 'password1'
click_button 'Login'
This code navigates to the '/login' page, fills in the 'Username' and 'Password' fields with 'user1' and 'password1' respectively, and then clicks the 'Login' button.
What will be the output of the following Capybara code?
visit '/home'
expect(page).to have_content 'Welcome'
This code navigates to the '/home' page, clicks on the element with id 'menu', and then checks if the page contains the text 'Welcome'. If the text is present, the test will pass, otherwise it will fail.
What does the following Capybara code do?
all('.item').each do |item|
This code finds all elements with the class 'item' and clicks on each one of them.
What does the following Capybara code do?
using_wait_time(5) do
  click_link 'More Info'
This code sets the maximum wait time to 5 seconds for the 'click_link' action. If the link 'More Info' is not available within 5 seconds, Capybara will throw an error.

Wrap-up questions

Final candidate for Capybara (web testing framework) Developer role questions

The final few questions should evaluate the candidate's teamwork, communication, and problem-solving skills. Additionally, assess their knowledge of microservices architecture, serverless computing, and how they handle Capybara (web testing framework) application deployments. Inquire about their experience in handling system failures and their approach to debugging and troubleshooting.

How would you use Capybara to interact with a dropdown menu?
You can use the 'select' method to interact with a dropdown menu. For example, 'select 'Option', from: 'Dropdown''.
What is the use of 'save_and_open_page' in Capybara?
'Save_and_open_page' is used to save and open the current page in the browser for debugging.
How would you use Capybara to test a modal dialog?
You can use the 'within' method to scope the interaction to the modal dialog. For example, 'within '.modal' do ... end'.

Capybara (web testing framework) application related

Product Perfect's Capybara (web testing framework) development capabilities

Beyond hiring for your Capybara (web testing framework) engineering team, you may be in the market for additional help. Product Perfect provides seasoned expertise in Capybara (web testing framework) projects, and can engage in multiple capacities.