def visit_twitter_and_log_in
visit 'https://cards-dev.twitter.com/validator'📁
find('input.js-username-field').set(ENV['TWITTER_USERNAME'])
find('input.js-password-field').set(ENV['TWITTER_PASSWORD'])
click_on('Log in')
end
def enter_url_and_click_preview(url)
find('input.FormControl').set(url)
click_on('Preview card')
result = has_content?('Page fetched successfully')
visit 'https://cards-dev.twitter.com/validator'📁
end
end