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_ruby

Example​

In the first half of our example we include our libraries and our usual setup, teardown, and run actions.

require 'selenium-webdriver'
require 'rspec/expectations'

def setup
  @driver = Selenium::WebDriver.for :firefox
end

def teardown
  @driver.quit
end

def run
  setup
  yield
  teardown
end

In the run action we define our loop and its behavior, creating the interactive prompt we want.

run do
  loop do
    print '>> '
    input = gets.chomp
    if input == 'q'
      puts 'Quitting...'
      @driver.quit
      exit 0
    end
    begin
      eval input
    rescue Exception => e
      puts e.message
    end
  end
end

The print command is used instead of puts because we want >> to appear on the same line as the input that we are issuing. This gives us the look and feel of a prompt. And we use gets.chomp to take in input. gets is responsible for receiving the input. And chomp removes the carriage return character (e.g. '\n') from the input.

Before executing the input we perform a check to see if the letter q is issued. If so, the script will post a message to the terminal, close the browser, and exit the prompt.

We then execute the input provided with eval and rescue exceptions, posting their message to the terminal when they occur.

Here is an example command you may issue to start: @driver.get 'https://www.google.com'.

Expected Behavior​

  • Firefox loads
  • An interactive prompt is presented
  • Issue a Selenium command and see it execute in the browser
  • Issue a command that it does not recognize (or that errors), and see a message stating the issue in the prompt
  • Issue q, the browser will close and the prompt will terminate

Summary​

Hopefully this REPL will help save you some time and frustration -- making it easier to write and debug your tests.