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require 'uri'
require 'stringio'
require 'rack'
require 'rack/lint'
require 'rack/utils'
require 'rack/response'
module Rack
# Rack::MockRequest helps testing your Rack application without
# actually using HTTP.
#
# After performing a request on a URL with get/post/put/patch/delete, it
# returns a MockResponse with useful helper methods for effective
# testing.
#
# You can pass a hash with additional configuration to the
# get/post/put/patch/delete.
# <tt>:input</tt>:: A String or IO-like to be used as rack.input.
# <tt>:fatal</tt>:: Raise a FatalWarning if the app writes to rack.errors.
# <tt>:lint</tt>:: If true, wrap the application in a Rack::Lint.
class MockRequest
class FatalWarning < RuntimeError
end
class FatalWarner
def puts(warning)
raise FatalWarning, warning
end
def write(warning)
raise FatalWarning, warning
end
def flush
end
def string
""
end
end
DEFAULT_ENV = {
"rack.version" => Rack::VERSION,
"rack.input" => StringIO.new,
"rack.errors" => StringIO.new,
"rack.multithread" => true,
"rack.multiprocess" => true,
"rack.run_once" => false,
}
def initialize(app)
@app = app
end
def get(uri, opts={}) request("GET", uri, opts) end
def post(uri, opts={}) request("POST", uri, opts) end
def put(uri, opts={}) request("PUT", uri, opts) end
def patch(uri, opts={}) request("PATCH", uri, opts) end
def delete(uri, opts={}) request("DELETE", uri, opts) end
def head(uri, opts={}) request("HEAD", uri, opts) end
def options(uri, opts={}) request("OPTIONS", uri, opts) end
def request(method="GET", uri="", opts={})
env = self.class.env_for(uri, opts.merge(:method => method))
if opts[:lint]
app = Rack::Lint.new(@app)
else
app = @app
end
errors = env["rack.errors"]
status, headers, body = app.call(env)
MockResponse.new(status, headers, body, errors)
ensure
body.close if body.respond_to?(:close)
end
# For historical reasons, we're pinning to RFC 2396. It's easier for users
# and we get support from ruby 1.8 to 2.2 using this method.
def self.parse_uri_rfc2396(uri)
@parser ||= defined?(URI::RFC2396_Parser) ? URI::RFC2396_Parser.new : URI
@parser.parse(uri)
end
# Return the Rack environment used for a request to +uri+.
def self.env_for(uri="", opts={})
uri = parse_uri_rfc2396(uri)
uri.path = "/#{uri.path}" unless uri.path[0] == ?/
env = DEFAULT_ENV.dup
env[REQUEST_METHOD] = opts[:method] ? opts[:method].to_s.upcase : "GET"
env["SERVER_NAME"] = uri.host || "example.org"
env["SERVER_PORT"] = uri.port ? uri.port.to_s : "80"
env[QUERY_STRING] = uri.query.to_s
env[PATH_INFO] = (!uri.path || uri.path.empty?) ? "/" : uri.path
env["rack.url_scheme"] = uri.scheme || "http"
env["HTTPS"] = env["rack.url_scheme"] == "https" ? "on" : "off"
env[SCRIPT_NAME] = opts[:script_name] || ""
if opts[:fatal]
env["rack.errors"] = FatalWarner.new
else
env["rack.errors"] = StringIO.new
end
if params = opts[:params]
if env[REQUEST_METHOD] == "GET"
params = Utils.parse_nested_query(params) if params.is_a?(String)
params.update(Utils.parse_nested_query(env[QUERY_STRING]))
env[QUERY_STRING] = Utils.build_nested_query(params)
elsif !opts.has_key?(:input)
opts["CONTENT_TYPE"] = "application/x-www-form-urlencoded"
if params.is_a?(Hash)
if data = Utils::Multipart.build_multipart(params)
opts[:input] = data
opts["CONTENT_LENGTH"] ||= data.length.to_s
opts["CONTENT_TYPE"] = "multipart/form-data; boundary=#{Utils::Multipart::MULTIPART_BOUNDARY}"
else
opts[:input] = Utils.build_nested_query(params)
end
else
opts[:input] = params
end
end
end
empty_str = ""
empty_str.force_encoding("ASCII-8BIT") if empty_str.respond_to? :force_encoding
opts[:input] ||= empty_str
if String === opts[:input]
rack_input = StringIO.new(opts[:input])
else
rack_input = opts[:input]
end
rack_input.set_encoding(Encoding::BINARY) if rack_input.respond_to?(:set_encoding)
env['rack.input'] = rack_input
env["CONTENT_LENGTH"] ||= env["rack.input"].length.to_s
opts.each { |field, value|
env[field] = value if String === field
}
env
end
end
# Rack::MockResponse provides useful helpers for testing your apps.
# Usually, you don't create the MockResponse on your own, but use
# MockRequest.
class MockResponse < Rack::Response
# Headers
attr_reader :original_headers
# Errors
attr_accessor :errors
def initialize(status, headers, body, errors=StringIO.new(""))
@original_headers = headers
@errors = errors.string if errors.respond_to?(:string)
@body_string = nil
super(body, status, headers)
end
def =~(other)
body =~ other
end
def match(other)
body.match other
end
def body
# FIXME: apparently users of MockResponse expect the return value of
# MockResponse#body to be a string. However, the real response object
# returns the body as a list.
#
# See spec_showstatus.rb:
#
# should "not replace existing messages" do
# ...
# res.body.should == "foo!"
# end
super.join
end
def empty?
[201, 204, 205, 304].include? status
end
end
end