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.


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# 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


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# 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


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# 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.


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# 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.


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# 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.


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# 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.


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# 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.


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# 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.


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# 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.


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# 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.


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# 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