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copied!<p>Unfortunately you cannot use subdomain in capybara's test but I have a workaround for this problem. I have helper class for resolving a subdomain from the request, see:</p> <pre><code>class SubdomainResolver class << self # Returns the current subdomain def current_subdomain_from(request) if Rails.env.test? and request.params[:_subdomain].present? request.params[:_subdomain] else request.subdomain end end end end </code></pre> <p>As you see, when the app is running in <code>test</code> mode and a special <code>_subdomain</code> request param is set the subdomain is taken from the request param called <code>_subdomain</code> otherwise <code>request.subdomain</code> (normal subdomain) is used.</p> <p>To make this workaround work you have to also override url builders, in <code>app/helpers</code> create the following module:</p> <pre><code>module UrlHelper def url_for(options = nil) if cannot_use_subdomain? if options.kind_of?(Hash) && options.has_key?(:subdomain) options[:_subdomain] = options[:subdomain] end end super(options) end # Simple workaround for integration tests. # On test environment (host: 127.0.0.1) store current subdomain in the request param :_subdomain. def default_url_options(options = {}) if cannot_use_subdomain? { _subdomain: current_subdomain } else {} end end private # Returns true when subdomains cannot be used. # For example when the application is running in selenium/webkit test mode. def cannot_use_subdomain? (Rails.env.test? or Rails.env.development?) and request.host == '127.0.0.1' end end </code></pre> <p><code>SubdomainResolver.current_subdomain_from</code> can be also used as constraint in <code>config/routes.rb</code></p> <p>I hope it will help you.</p>

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