Class: Rack::MockRequest

Inherits:
Object
  • Object
show all
Defined in:
lib/rack/mock.rb

Overview

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.

:input

A String or IO-like to be used as rack.input.

:fatal

Raise a FatalWarning if the app writes to rack.errors.

:lint

If true, wrap the application in a Rack::Lint.

Defined Under Namespace

Classes: FatalWarner, FatalWarning

Constant Summary collapse

DEFAULT_ENV =
{
  RACK_VERSION      => Rack::VERSION,
  RACK_INPUT        => StringIO.new,
  RACK_ERRORS       => StringIO.new,
  RACK_MULTITHREAD  => true,
  RACK_MULTIPROCESS => true,
  RACK_RUNONCE      => false,
}.freeze

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ MockRequest

Returns a new instance of MockRequest.


52
53
54
# File 'lib/rack/mock.rb', line 52

def initialize(app)
  @app = app
end

Class Method Details

.env_for(uri = "", opts = {}) ⇒ Object

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

:method

The HTTP request method to use

:params

The params to use

:script_name

The SCRIPT_NAME to set


105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
# File 'lib/rack/mock.rb', line 105

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).b
  env[SERVER_NAME]     = (uri.host || "example.org").b
  env[SERVER_PORT]     = (uri.port ? uri.port.to_s : "80").b
  env[QUERY_STRING]    = (uri.query.to_s).b
  env[PATH_INFO]       = ((!uri.path || uri.path.empty?) ? "/" : 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

  empty_str = String.new
  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)
  env[RACK_INPUT] = rack_input

  env["CONTENT_LENGTH"] ||= env[RACK_INPUT].size.to_s if env[RACK_INPUT].respond_to?(:size)

  opts.each { |field, value|
    env[field] = value  if String === field
  }

  env
end

.parse_uri_rfc2396(uri) ⇒ Object

For historical reasons, we're pinning to RFC 2396. URI::Parser = URI::RFC2396_Parser


92
93
94
95
# File 'lib/rack/mock.rb', line 92

def self.parse_uri_rfc2396(uri)
  @parser ||= URI::Parser.new
  @parser.parse(uri)
end

Instance Method Details

#delete(uri, opts = {}) ⇒ Object

Make a DELETE request and return a MockResponse. See #request.


65
# File 'lib/rack/mock.rb', line 65

def delete(uri, opts = {})  request(DELETE, uri, opts)  end

#get(uri, opts = {}) ⇒ Object

Make a GET request and return a MockResponse. See #request.


57
# File 'lib/rack/mock.rb', line 57

def get(uri, opts = {})     request(GET, uri, opts)     end

#head(uri, opts = {}) ⇒ Object

Make a HEAD request and return a MockResponse. See #request.


67
# File 'lib/rack/mock.rb', line 67

def head(uri, opts = {})    request(HEAD, uri, opts)    end

#options(uri, opts = {}) ⇒ Object

Make an OPTIONS request and return a MockResponse. See #request.


69
# File 'lib/rack/mock.rb', line 69

def options(uri, opts = {}) request(OPTIONS, uri, opts) end

#patch(uri, opts = {}) ⇒ Object

Make a PATCH request and return a MockResponse. See #request.


63
# File 'lib/rack/mock.rb', line 63

def patch(uri, opts = {})   request(PATCH, uri, opts)   end

#post(uri, opts = {}) ⇒ Object

Make a POST request and return a MockResponse. See #request.


59
# File 'lib/rack/mock.rb', line 59

def post(uri, opts = {})    request(POST, uri, opts)    end

#put(uri, opts = {}) ⇒ Object

Make a PUT request and return a MockResponse. See #request.


61
# File 'lib/rack/mock.rb', line 61

def put(uri, opts = {})     request(PUT, uri, opts)     end

#request(method = GET, uri = "", opts = {}) ⇒ Object

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.


74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
# File 'lib/rack/mock.rb', line 74

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