Add new Response.[] and MockResponse.[] which are very similar. F…

…ixes rack#1094.

lib/rack/mock.rb

@@ -157,6 +157,10 @@ def self.env_for(uri = "", opts = {})
   # MockRequest.
 
   class MockResponse < Rack::Response
+    class << self
+      alias [] new
+    end
+
     # Headers
     attr_reader :original_headers, :cookies
 

lib/rack/response.rb

@@ -21,6 +21,10 @@ module Rack
   # Your application's +call+ should end returning Response#finish.
 
   class Response
+    def self.[] (status, headers, body)
+      self.new(body, status, headers)
+    end
+
     attr_accessor :length, :status, :body
     attr_reader :header
     alias headers header

test/spec_mock.rb

@@ -248,6 +248,17 @@
 end
 
 describe Rack::MockResponse do
+  it 'has standard constructor' do
+    headers = { "header" => "value" }
+    body = ["body"]
+
+    response = Rack::MockResponse[200, headers, body]
+
+    response.status.must_equal 200
+    response.headers.must_equal headers
+    response.body.must_equal body.join
+  end
+
   it "provide access to the HTTP status" do
     res = Rack::MockRequest.new(app).get("")
     res.must_be :successful?

test/spec_response.rb

@@ -6,6 +6,17 @@
 require 'stringio'
 
 describe Rack::Response do
+  it 'has standard constructor' do
+    headers = { "header" => "value" }
+    body = ["body"]
+
+    response = Rack::Response[200, headers, body]
+
+    response.status.must_equal 200
+    response.headers.must_equal headers
+    response.body.must_equal body
+  end
+
   it 'has cache-control methods' do
     response = Rack::Response.new
     cc = 'foo'