Fix merge api and spec

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

lib/api/merge_requests.rb

@@ -200,7 +200,7 @@ module API
             if merge_request.can_be_merged?
               commit_message = params[:merge_commit_message] || merge_request.merge_commit_message
-              MergeRequests::MergeService.new(merge_request.target_project, current_user).
+              ::MergeRequests::MergeService.new(merge_request.target_project, current_user).
                 execute(merge_request, commit_message)
               present merge_request, with: Entities::MergeRequest

spec/requests/api/merge_requests_spec.rb

@@ -147,7 +147,7 @@ describe API::API, api: true  do
       it "should return merge_request" do
         post api("/projects/#{project.id}/merge_requests", user),
              title: 'Test merge_request',
-             source_branch: 'stable',
+             source_branch: 'feature_conflict',
              target_branch: 'master',
              author: user,
              labels: 'label, label2'
@@ -170,20 +170,20 @@ describe API::API, api: true  do
       it "should return 400 when target_branch is missing" do
         post api("/projects/#{project.id}/merge_requests", user),
-        title: "Test merge_request", source_branch: "stable", author: user
+        title: "Test merge_request", source_branch: "markdown", author: user
         expect(response.status).to eq(400)
       end
       it "should return 400 when title is missing" do
         post api("/projects/#{project.id}/merge_requests", user),
-        target_branch: 'master', source_branch: 'stable'
+        target_branch: 'master', source_branch: 'markdown'
         expect(response.status).to eq(400)
       end
       it 'should return 400 on invalid label names' do
         post api("/projects/#{project.id}/merge_requests", user),
              title: 'Test merge_request',
-             source_branch: 'stable',
+             source_branch: 'markdown',
              target_branch: 'master',
              author: user,
              labels: 'label, ?'
@@ -197,7 +197,7 @@ describe API::API, api: true  do
         before do
           post api("/projects/#{project.id}/merge_requests", user),
                title: 'Test merge_request',
-               source_branch: 'stable',
+               source_branch: 'feature_conflict',
                target_branch: 'master',
                author: user
           @mr = MergeRequest.all.last
@@ -207,7 +207,7 @@ describe API::API, api: true  do
           expect do
             post api("/projects/#{project.id}/merge_requests", user),
                  title: 'New test merge_request',
-                 source_branch: 'stable',
+                 source_branch: 'feature_conflict',
                  target_branch: 'master',
                  author: user
           end.to change { MergeRequest.count }.by(0)
@@ -227,7 +227,8 @@ describe API::API, api: true  do
       it "should return merge_request" do
         post api("/projects/#{fork_project.id}/merge_requests", user2),
-        title: 'Test merge_request', source_branch: "stable", target_branch: "master", author: user2, target_project_id: project.id, description: 'Test description for Test merge_request'
+          title: 'Test merge_request', source_branch: "feature_conflict", target_branch: "master",
+          author: user2, target_project_id: project.id, description: 'Test description for Test merge_request'
         expect(response.status).to eq(201)
         expect(json_response['title']).to eq('Test merge_request')
         expect(json_response['description']).to eq('Test description for Test merge_request')
@@ -257,7 +258,7 @@ describe API::API, api: true  do
       it "should return 400 when title is missing" do
         post api("/projects/#{fork_project.id}/merge_requests", user2),
-        target_branch: 'master', source_branch: 'stable', author: user2, target_project_id: project.id
+        target_branch: 'master', source_branch: 'markdown', author: user2, target_project_id: project.id
         expect(response.status).to eq(400)
       end
@@ -266,7 +267,7 @@ describe API::API, api: true  do
           post api("/projects/#{project.id}/merge_requests", user),
                title: 'Test merge_request',
                target_branch: 'master',
-               source_branch: 'stable',
+               source_branch: 'markdown',
                author: user,
                target_project_id: fork_project.id
           expect(response.status).to eq(422)
@@ -276,7 +277,7 @@ describe API::API, api: true  do
           post api("/projects/#{fork_project.id}/merge_requests", user2),
                title: 'Test merge_request',
                target_branch: 'master',
-               source_branch: 'stable',
+               source_branch: 'markdown',
                author: user2,
                target_project_id: unrelated_project.id
           expect(response.status).to eq(422)
@@ -285,7 +286,7 @@ describe API::API, api: true  do
       it "should return 201 when target_branch is specified and for the same project" do
         post api("/projects/#{fork_project.id}/merge_requests", user2),
-        title: 'Test merge_request', target_branch: 'master', source_branch: 'stable', author: user2, target_project_id: fork_project.id
+        title: 'Test merge_request', target_branch: 'master', source_branch: 'markdown', author: user2, target_project_id: fork_project.id
         expect(response.status).to eq(201)
       end
     end
@@ -301,9 +302,6 @@ describe API::API, api: true  do
   describe "PUT /projects/:id/merge_request/:merge_request_id/merge" do
     it "should return merge_request in case of success" do
-      allow_any_instance_of(MergeRequest).
-        to receive_messages(can_be_merged?: true, automerge!: true)
-
       put api("/projects/#{project.id}/merge_request/#{merge_request.id}/merge", user)
       expect(response.status).to eq(200)