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module RSpec
module Rails
# Builds paths for view specs using a particular route set.
class ViewPathBuilder
def initialize(route_set)
self.class.send(:include, route_set.url_helpers)
end
# Given a hash of parameters, build a view path, if possible.
# Returns nil if no path can be built from the given params.
#
# @example
# # path can be built because all required params are present in the hash
# view_path_builder = ViewPathBuilder.new(::Rails.application.routes)
# view_path_builder.path_for({ :controller => 'posts', :action => 'show', :id => '54' })
# # => "/post/54"
#
# @example
# # path cannot be built because the params are missing a required element (:id)
# view_path_builder.path_for({ :controller => 'posts', :action => 'delete' })
# # => ActionController::UrlGenerationError: No route matches {:action=>"delete", :controller=>"posts"}
def path_for(path_params)
url_for(path_params.merge(only_path: true))
rescue => e
e.message
end
end
end
end
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