Merge Request uses StateMachine now

app/models/merge_request.rb

@@ -25,7 +25,7 @@ class MergeRequest < ActiveRecord::Base
   include Issuable
   attr_accessible :title, :assignee_id, :target_branch, :source_branch, :milestone_id,
-                  :author_id_of_changes
+                  :author_id_of_changes, :state_event
   attr_accessor :should_remove_source_branch

lib/api/entities.rb

@@ -81,7 +81,7 @@ module Gitlab
     end
     class MergeRequest < Grape::Entity
-      expose :id, :target_branch, :source_branch, :project_id, :title, :closed, :merged
+      expose :id, :target_branch, :source_branch, :project_id, :title, :state
       expose :author, :assignee, using: Entities::UserBasic
     end

lib/api/merge_requests.rb

@@ -73,12 +73,12 @@ module Gitlab
       #   target_branch               - The target branch
       #   assignee_id                 - Assignee user ID
       #   title                       - Title of MR
-      #   closed                      - Status of MR. true - closed
+      #   state_event                 - Status of MR. (close|reopen|merge)
       # Example:
       #   PUT /projects/:id/merge_request/:merge_request_id
       #
       put ":id/merge_request/:merge_request_id" do
-        attrs = attributes_for_keys [:source_branch, :target_branch, :assignee_id, :title, :closed]
+        attrs = attributes_for_keys [:source_branch, :target_branch, :assignee_id, :title, :state_event]
         merge_request = user_project.merge_requests.find(params[:merge_request_id])
         authorize! :modify_merge_request, merge_request

spec/requests/api/merge_requests_spec.rb

@@ -43,6 +43,23 @@ describe Gitlab::API do
     end
   end
+  describe "PUT /projects/:id/merge_request/:merge_request_id to close MR" do
+    it "should return merge_request" do
+      put api("/projects/#{project.id}/merge_request/#{merge_request.id}", user), state_event: "close"
+      response.status.should == 200
+      json_response['state'].should == 'closed'
+    end
+  end
+
+  describe "PUT /projects/:id/merge_request/:merge_request_id to merge MR" do
+    it "should return merge_request" do
+      put api("/projects/#{project.id}/merge_request/#{merge_request.id}", user), state_event: "merge"
+      response.status.should == 200
+      json_response['state'].should == 'merged'
+    end
+  end
+
+
   describe "PUT /projects/:id/merge_request/:merge_request_id" do
     it "should return merge_request" do
       put api("/projects/#{project.id}/merge_request/#{merge_request.id}", user), title: "New title"