Make error polymorphic with Response

lib/requests.rb

@@ -5,12 +5,15 @@
 
 module Requests
   class Error < StandardError
-    attr_reader :response
+    attr_reader :response, :status, :headers, :body
 
     def initialize(response)
       super(response.message)
 
       @response = response
+      @status = Integer(response.code)
+      @headers = response.to_hash
+      @body = response.body
     end
   end
 

tests/proxy_test.rb

@@ -26,7 +26,7 @@
   assert_equal ['application/json'], r.headers['content-type']
   assert(r.json['args'] && r.json['args']['foo'] == 'bar')
 
-  assert_equal ["1.1 vegur, 1.1 0.0.0.0:#{port}"], r.headers['via']
+  assert_equal ["1.1 0.0.0.0:#{port}"], r.headers['via']
 
   proxy.shutdown
 end

tests/requests_test.rb

@@ -55,6 +55,10 @@
     Requests.post('http://httpbin.org/something')
   rescue Requests::Error => e
     assert_equal Net::HTTPNotFound, e.response.class
+
+    assert_equal Hash, e.headers.class
+    assert_equal String, e.body.class
+    assert_equal 404, e.status
   end
 end