1 files changed, 18 insertions, 6 deletions
diff --git a/actionpack/CHANGELOG.md b/actionpack/CHANGELOG.md
index bf964d06e9..d473ab427d 100644
--- a/actionpack/CHANGELOG.md
+++ b/actionpack/CHANGELOG.md
@@ -1,3 +1,7 @@
+*   Add application/gzip as a default mime type.
+
+    *Mehmet Emin İNAÇ*
+
 *   Add request encoding and response parsing to integration tests.
 
     What previously was:
@@ -13,7 +17,7 @@
             headers: { 'Content-Type' => 'application/json' }
         end
 
-        assert_equal({ id: Article.last.id, title: 'Ahoy!' }, JSON.parse(response.body))
+        assert_equal({ 'id' => Article.last.id, 'title' => 'Ahoy!' }, JSON.parse(response.body))
       end
     end
     ```
@@ -26,13 +30,22 @@
     class ApiTest < ActionDispatch::IntegrationTest
       test 'creates articles' do
         assert_difference -> { Article.count } do
-          post articles_path, { article: { title: 'Ahoy!' } }, as: :json
+          post articles_path, params: { article: { title: 'Ahoy!' } }, as: :json
         end
 
-        assert_equal({ id: Article.last.id, title: 'Ahoy!' }, response.parsed_body)
+        assert_equal({ 'id' => Article.last.id, 'title' => 'Ahoy!' }, response.parsed_body)
       end
     end
     ```
+    
+    Passing `as: :json` to integration test request helpers will set the format,
+    content type and encode the parameters as JSON.
+    
+    Then on the response side, `parsed_body` will parse the body according to the
+    content type the response has.
+    
+    Currently JSON is the only supported MIME type. Add your own with
+    `ActionDispatch::IntegrationTest.register_encoder`.
 
     *Kasper Timm Hansen*
 
@@ -42,11 +55,10 @@
 
 ## Rails 5.0.0.beta2 (February 01, 2016) ##
 
-*   Add `-g` and `-c` (short for _grep_ and _controller_ respectively) options
-    to `bin/rake routes`. These options return the url `name`, `verb` and
+*   Add `-g` and `-c` options to `bin/rails routes`. These options return the url `name`, `verb` and
     `path` field that match the pattern or match a specific controller.
 
-    Deprecate `CONTROLLER` env variable in `bin/rake routes`.
+    Deprecate `CONTROLLER` env variable in `bin/rails routes`.
 
     See #18902.