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# frozen_string_literal: true
require 'uri'
require 'stringio'
require_relative 'constants'
require_relative 'mock_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
def initialize(app)
@app = app
end
# Make a GET request and return a MockResponse. See #request.
def get(uri, opts = {}) request(GET, uri, opts) end
# Make a POST request and return a MockResponse. See #request.
def post(uri, opts = {}) request(POST, uri, opts) end
# Make a PUT request and return a MockResponse. See #request.
def put(uri, opts = {}) request(PUT, uri, opts) end
# Make a PATCH request and return a MockResponse. See #request.
def patch(uri, opts = {}) request(PATCH, uri, opts) end
# Make a DELETE request and return a MockResponse. See #request.
def delete(uri, opts = {}) request(DELETE, uri, opts) end
# Make a HEAD request and return a MockResponse. See #request.
def head(uri, opts = {}) request(HEAD, uri, opts) end
# Make an OPTIONS request and return a MockResponse. See #request.
def options(uri, opts = {}) request(OPTIONS, uri, opts) end
# Make a request using the given request method for the given
# uri to the rack application and return a MockResponse.
# Options given are passed to MockRequest.env_for.
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.
# URI::Parser = URI::RFC2396_Parser
def self.parse_uri_rfc2396(uri)
@parser ||= URI::Parser.new
@parser.parse(uri)
end
# Return the Rack environment used for a request to +uri+.
# All options that are strings are added to the returned environment.
# Options:
# :fatal :: Whether to raise an exception if request outputs to rack.errors
# :input :: The rack.input to set
# :http_version :: The SERVER_PROTOCOL to set
# :method :: The HTTP request method to use
# :params :: The params to use
# :script_name :: The SCRIPT_NAME to set
def self.env_for(uri = "", opts = {})
uri = parse_uri_rfc2396(uri)
uri.path = "/#{uri.path}" unless uri.path[0] == ?/
env = {}
env[REQUEST_METHOD] = (opts[:method] ? opts[:method].to_s.upcase : GET).b
env[SERVER_NAME] = (uri.host || "example.org").b
env[SERVER_PORT] = (uri.port ? uri.port.to_s : "80").b
env[SERVER_PROTOCOL] = opts[:http_version] || 'HTTP/1.1'
env[QUERY_STRING] = (uri.query.to_s).b
env[PATH_INFO] = (uri.path).b
env[RACK_URL_SCHEME] = (uri.scheme || "http").b
env[HTTPS] = (env[RACK_URL_SCHEME] == "https" ? "on" : "off").b
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 = Rack::Multipart.build_multipart(params)
opts[:input] = data
opts["CONTENT_LENGTH"] ||= data.length.to_s
opts["CONTENT_TYPE"] = "multipart/form-data; boundary=#{Rack::Multipart::MULTIPART_BOUNDARY}"
else
opts[:input] = Utils.build_nested_query(params)
end
else
opts[:input] = params
end
end
end
if String === opts[:input]
rack_input = StringIO.new(opts[:input])
else
rack_input = opts[:input]
end
if rack_input
rack_input.set_encoding(Encoding::BINARY)
env[RACK_INPUT] = rack_input
env["CONTENT_LENGTH"] ||= env[RACK_INPUT].size.to_s if env[RACK_INPUT].respond_to?(:size)
end
opts.each { |field, value|
env[field] = value if String === field
}
env
end
end
end
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