Fixed deploy token creation

Fixed case when a deploy token is created without scope.
Updated rspec accordingly.
Did a bit of refactoring for the DeployToken create services classes.

app/controllers/groups/settings/ci_cd_controller.rb

@@ -43,7 +43,7 @@ module Groups
       end
 
       def create_deploy_token
-        result = Projects::DeployTokens::CreateService.new(@group, current_user, deploy_token_params).execute
+        result = Groups::DeployTokens::CreateService.new(@group, current_user, deploy_token_params).execute
         @new_deploy_token = result[:deploy_token]
 
         if result[:status] == :success

app/services/concerns/deploy_token_methods.rb

@@ -14,4 +14,12 @@ module DeployTokenMethods
 
     deploy_token.destroy
   end
+
+  def create_deploy_token_payload_for(deploy_token)
+    if deploy_token.persisted?
+      success(deploy_token: deploy_token, http_status: :created)
+    else
+      error(deploy_token.errors.full_messages.to_sentence, :bad_request).merge(deploy_token: deploy_token)
+    end
+  end
 end

app/services/groups/deploy_tokens/create_service.rb

@@ -8,11 +8,7 @@ module Groups
       def execute
         deploy_token = create_deploy_token_for(@group, params)
 
-        if deploy_token.persisted?
-          success(deploy_token: deploy_token, http_status: :created)
-        else
-          error(deploy_token.errors.full_messages.to_sentence, :bad_request)
-        end
+        create_deploy_token_payload_for(deploy_token)
       end
     end
   end

app/services/projects/deploy_tokens/create_service.rb

@@ -8,11 +8,7 @@ module Projects
       def execute
         deploy_token = create_deploy_token_for(@project, params)
 
-        if deploy_token.persisted?
-          success(deploy_token: deploy_token, http_status: :created)
-        else
-          error(deploy_token.errors.full_messages.to_sentence, :bad_request)
-        end
+        create_deploy_token_payload_for(deploy_token)
       end
     end
   end

spec/support/shared_examples/controllers/deploy_token_shared_examples.rb

 # frozen_string_literal: true
 
 RSpec.shared_examples 'a created deploy token' do
+  let(:read_repository) { '1' }
   let(:deploy_token_params) do
     {
       name: 'deployer_token',
       expires_at: 1.month.from_now.to_date.to_s,
       username: 'deployer',
-      read_repository: '1',
+      read_repository: read_repository,
       deploy_token_type: deploy_token_type
     }
   end
@@ -19,4 +20,15 @@ RSpec.shared_examples 'a created deploy token' do
     expect(response).to have_gitlab_http_status(:ok)
     expect(response).to render_template(:show)
   end
+
+  context 'when no scope is selected' do
+    let(:read_repository) { '0' }
+
+    it 'creates a variable with a errored deploy token' do
+      expect { create_deploy_token }.not_to change { DeployToken.active.count }
+
+      expect(assigns(:new_deploy_token)).to be_a(DeployToken)
+      expect(assigns(:new_deploy_token).errors.full_messages.first).to eq('Scopes can\'t be blank')
+    end
+  end
 end