Created
September 2, 2024 07:56
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Save/show browser logs (Chome + Selenium + Capybara + Rails)
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| class ApplicationSystemTestCase < ActionDispatch::SystemTestCase | |
| Capybara.register_driver :chrome_headless do |app| | |
| client = Selenium::WebDriver::Remote::Http::Default.new | |
| client.read_timeout = ENV.fetch("SELENIUM_READ_TIMEOUT", 120).to_i | |
| options = Selenium::WebDriver::Chrome::Options.new | |
| options.add_argument('--headless=new') if ENV["HEADLESS"] != "false" | |
| options.add_argument('--disable-extensions') | |
| options.add_argument('--disable-gpu') | |
| options.add_option("goog:loggingPrefs", { browser: "ALL" }) | |
| if ENV["CI"].present? || ENV["CODESPACES"].present? | |
| options.add_argument('--no-sandbox') | |
| options.add_argument('--disable-dev-shm-usage') | |
| end | |
| driver_arguments = { | |
| http_client: client, | |
| browser: :chrome, | |
| # List https://chromedriver.chromium.org/capabilities | |
| options: options, | |
| clear_local_storage: true, | |
| clear_session_storage: true | |
| } | |
| Capybara::Selenium::Driver.new(app, **driver_arguments) | |
| end | |
| def self.browser_logger | |
| @browser_logger ||= Logger.new( | |
| Rails.root.join("log", "browser.log"), | |
| formatter: proc { |_, _, _, msg| msg } | |
| ) | |
| end | |
| def self.logger_formatter | |
| @logger_formatter ||= Logger::Formatter.new | |
| end | |
| def browser_logger | |
| self.class.browser_logger | |
| end | |
| def logger_formatter | |
| self.class.logger_formatter | |
| end | |
| def before_teardown | |
| # Get browser console logs. | |
| # | |
| # You can test it using: | |
| # — `execute_script("console.error('This is error')")`. | |
| # — `execute_script("console.info('This is info')")`. | |
| # — `execute_script("console.log('This is log')")`. | |
| browser_logs = page.driver.browser.logs.get(:browser) | |
| browser_logs.each do |log| | |
| browser_logger.unknown do | |
| # Keep microseconds and local machine timezone | |
| seconds, microseconds = log.timestamp.divmod(1000) | |
| time = Time.at(seconds, microseconds * 1000) | |
| # Write log message with test name | |
| logger_formatter.call(log.level, time, name, log.message) | |
| end | |
| end | |
| super | |
| end | |
| def browser_logs | |
| page.driver.browser.manage.logs.get(:browser) | |
| end | |
| end |
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