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require 'uri'
require 'stringio'
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/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/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" => [0,1],
"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 delete(uri, opts={}) request("DELETE", 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"]
MockResponse.new(*(app.call(env) + [errors]))
end
# Return the Rack environment used for a request to +uri+.
def self.env_for(uri="", opts={})
uri = URI(uri)
env = DEFAULT_ENV.dup
env["REQUEST_METHOD"] = opts[:method] || "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["SCRIPT_NAME"] = opts[:script_name] || ""
if opts[:fatal]
env["rack.errors"] = FatalWarner.new
else
env["rack.errors"] = StringIO.new
end
opts[:input] ||= ""
if String === opts[:input]
env["rack.input"] = StringIO.new(opts[:input])
else
env["rack.input"] = opts[:input]
end
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
def initialize(status, headers, body, errors=StringIO.new(""))
@status = status.to_i
@original_headers = headers
@headers = Rack::Utils::HeaderHash.new
headers.each { |field, values|
@headers[field] = values
@headers[field] = "" if values.empty?
}
@body = ""
body.each { |part| @body << part }
@errors = errors.string
end
# Status
attr_reader :status
# Headers
attr_reader :headers, :original_headers
def [](field)
headers[field]
end
# Body
attr_reader :body
def =~(other)
@body =~ other
end
def match(other)
@body.match other
end
# Errors
attr_accessor :errors
include Response::Helpers
end
end
|
