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module ActionDispatch
module Assertions
# A small suite of assertions that test responses from \Rails applications.
module ResponseAssertions
RESPONSE_PREDICATES = { # :nodoc:
success: :successful?,
missing: :not_found?,
redirect: :redirection?,
error: :server_error?,
}
# Asserts that the response is one of the following types:
#
# * <tt>:success</tt> - Status code was in the 200-299 range
# * <tt>:redirect</tt> - Status code was in the 300-399 range
# * <tt>:missing</tt> - Status code was 404
# * <tt>:error</tt> - Status code was in the 500-599 range
#
# You can also pass an explicit status number like <tt>assert_response(501)</tt>
# or its symbolic equivalent <tt>assert_response(:not_implemented)</tt>.
# See Rack::Utils::SYMBOL_TO_STATUS_CODE for a full list.
#
# # Asserts that the response was a redirection
# assert_response :redirect
#
# # Asserts that the response code was status code 401 (unauthorized)
# assert_response 401
def assert_response(type, message = nil)
message ||= generate_response_message(type)
if Symbol === type
if [:success, :missing, :redirect, :error].include?(type)
assert @response.send(RESPONSE_PREDICATES[type]), message
else
code = Rack::Utils::SYMBOL_TO_STATUS_CODE[type]
if code.nil?
raise ArgumentError, "Invalid response type :#{type}"
end
assert_equal code, @response.response_code, message
end
else
assert_equal type, @response.response_code, message
end
end
# Asserts that the redirection options passed in match those of the redirect called in the latest action.
# This match can be partial, such that <tt>assert_redirected_to(controller: "weblog")</tt> will also
# match the redirection of <tt>redirect_to(controller: "weblog", action: "show")</tt> and so on.
#
# # Asserts that the redirection was to the "index" action on the WeblogController
# assert_redirected_to controller: "weblog", action: "index"
#
# # Asserts that the redirection was to the named route login_url
# assert_redirected_to login_url
#
# # Asserts that the redirection was to the url for @customer
# assert_redirected_to @customer
#
# # Asserts that the redirection matches the regular expression
# assert_redirected_to %r(\Ahttp://example.org)
def assert_redirected_to(options = {}, message=nil)
assert_response(:redirect, message)
return true if options === @response.location
redirect_is = normalize_argument_to_redirection(@response.location)
redirect_expected = normalize_argument_to_redirection(options)
message ||= "Expected response to be a redirect to <#{redirect_expected}> but was a redirect to <#{redirect_is}>"
assert_operator redirect_expected, :===, redirect_is, message
end
private
# Proxy to to_param if the object will respond to it.
def parameterize(value)
value.respond_to?(:to_param) ? value.to_param : value
end
def normalize_argument_to_redirection(fragment)
if Regexp === fragment
fragment
else
handle = @controller || ActionController::Redirecting
handle._compute_redirect_to_location(@request, fragment)
end
end
def generate_response_message(type, code = @response.response_code)
"Expected response to be a <#{type}>, but was a <#{code}>"
.concat location_if_redirected
end
def location_if_redirected
return '' unless @response.redirection? && @response.location.present?
location = normalize_argument_to_redirection(@response.location)
" redirect to <#{location}>"
end
end
end
end
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