Improve deploy environment chatops slash command

We now match deployment actions better. If there is more than one
deployment action matched, we check if there is an action which name
equals to environment name, instead of raising an error about too many
actions defined.

lib/gitlab/slash_commands/deploy.rb

@@ -21,29 +21,34 @@ module Gitlab
         from = match[:from]
         to = match[:to]
 
-        actions = find_actions(from, to)
+        action = find_action(from, to)
 
-        if actions.none?
-          Gitlab::SlashCommands::Presenters::Deploy.new(nil).no_actions
-        elsif actions.one?
-          action = play!(from, to, actions.first)
-          Gitlab::SlashCommands::Presenters::Deploy.new(action).present(from, to)
+        if action.nil?
+          Gitlab::SlashCommands::Presenters::Deploy
+            .new(action).action_not_found
         else
-          Gitlab::SlashCommands::Presenters::Deploy.new(actions).too_many_actions
+          deployment = action.play(current_user)
+
+          Gitlab::SlashCommands::Presenters::Deploy
+            .new(deployment).present(from, to)
         end
       end
 
       private
 
-      def play!(from, to, action)
-        action.play(current_user)
-      end
-
-      def find_actions(from, to)
+      def find_action(from, to)
         environment = project.environments.find_by(name: from)
-        return [] unless environment
+        return unless environment
 
-        environment.actions_for(to).select(&:starts_environment?)
+        actions = environment.actions_for(to).select do |action|
+          action.starts_environment?
+        end
+
+        if actions.many?
+          actions.find { |action| action.name == to.to_s }
+        else
+          actions.first
+        end
       end
     end
   end

lib/gitlab/slash_commands/presenters/deploy.rb

@@ -3,17 +3,14 @@ module Gitlab
     module Presenters
       class Deploy < Presenters::Base
         def present(from, to)
-          message = "Deployment started from #{from} to #{to}. [Follow its progress](#{resource_url})."
+          message = "Deployment started from #{from} to #{to}. " \
+                    "[Follow its progress](#{resource_url})."
 
           in_channel_response(text: message)
         end
 
-        def no_actions
-          ephemeral_response(text: "No action found to be executed")
-        end
-
-        def too_many_actions
-          ephemeral_response(text: "Too many actions defined")
+        def action_not_found
+          ephemeral_response(text: "Couldn't find a deployment action.")
         end
       end
     end

spec/lib/gitlab/slash_commands/deploy_spec.rb

@@ -22,7 +22,7 @@ describe Gitlab::SlashCommands::Deploy do
     context 'if no environment is defined' do
       it 'does not execute an action' do
         expect(subject[:response_type]).to be(:ephemeral)
-        expect(subject[:text]).to eq("No action found to be executed")
+        expect(subject[:text]).to eq "Couldn't find a deployment action."
       end
     end
 
@@ -35,12 +35,12 @@ describe Gitlab::SlashCommands::Deploy do
       context 'without actions' do
         it 'does not execute an action' do
           expect(subject[:response_type]).to be(:ephemeral)
-          expect(subject[:text]).to eq("No action found to be executed")
+          expect(subject[:text]).to eq "Couldn't find a deployment action."
         end
       end
 
-      context 'with action' do
-        let!(:manual1) do
+      context 'when single action has been matched' do
+        before do
           create(:ci_build, :manual, pipeline: pipeline,
                                      name: 'first',
                                      environment: 'production')
@@ -48,31 +48,61 @@ describe Gitlab::SlashCommands::Deploy do
 
         it 'returns success result' do
           expect(subject[:response_type]).to be(:in_channel)
-          expect(subject[:text]).to start_with('Deployment started from staging to production')
+          expect(subject[:text])
+            .to start_with('Deployment started from staging to production')
         end
+      end
+
+      context 'when more than one action has been matched' do
+        context 'when there is no specific actions with a environment name' do
+          before do
+            create(:ci_build, :manual, pipeline: pipeline,
+                                       name: 'first',
+                                       environment: 'production')
 
-        context 'when duplicate action exists' do
-          let!(:manual2) do
             create(:ci_build, :manual, pipeline: pipeline,
                                        name: 'second',
                                        environment: 'production')
           end
 
-          it 'returns error' do
+          it 'returns error about too many actions defined' do
+            expect(subject[:text]).to eq("Couldn't find a deployment action.")
             expect(subject[:response_type]).to be(:ephemeral)
-            expect(subject[:text]).to eq('Too many actions defined')
           end
         end
 
-        context 'when teardown action exists' do
-          let!(:teardown) do
+        context 'when one of the actions is environement specific action' do
+          before do
+            create(:ci_build, :manual, pipeline: pipeline,
+                                       name: 'first',
+                                       environment: 'production')
+
+            create(:ci_build, :manual, pipeline: pipeline,
+                                       name: 'production',
+                                       environment: 'production')
+          end
+
+          it 'deploys to production' do
+            expect(subject[:text])
+              .to start_with('Deployment started from staging to production')
+            expect(subject[:response_type]).to be(:in_channel)
+          end
+        end
+
+        context 'when one of the actions is a teardown action' do
+          before do
+            create(:ci_build, :manual, pipeline: pipeline,
+                                       name: 'first',
+                                       environment: 'production')
+
             create(:ci_build, :manual, :teardown_environment,
                    pipeline: pipeline, name: 'teardown', environment: 'production')
           end
 
-          it 'returns the success message' do
+          it 'deploys to production' do
+            expect(subject[:text])
+              .to start_with('Deployment started from staging to production')
             expect(subject[:response_type]).to be(:in_channel)
-            expect(subject[:text]).to start_with('Deployment started from staging to production')
           end
         end
       end

spec/lib/gitlab/slash_commands/presenters/deploy_spec.rb

@@ -17,8 +17,8 @@ describe Gitlab::SlashCommands::Presenters::Deploy do
     end
   end
 
-  describe '#no_actions' do
-    subject { described_class.new(nil).no_actions }
+  describe '#action_not_found' do
+    subject { described_class.new(nil).action_not_found }
 
     it { is_expected.to have_key(:text) }
     it { is_expected.to have_key(:response_type) }
@@ -27,21 +27,7 @@ describe Gitlab::SlashCommands::Presenters::Deploy do
 
     it 'tells the user there is no action' do
       expect(subject[:response_type]).to be(:ephemeral)
-      expect(subject[:text]).to eq("No action found to be executed")
-    end
-  end
-
-  describe '#too_many_actions' do
-    subject { described_class.new([]).too_many_actions }
-
-    it { is_expected.to have_key(:text) }
-    it { is_expected.to have_key(:response_type) }
-    it { is_expected.to have_key(:status) }
-    it { is_expected.not_to have_key(:attachments) }
-
-    it 'tells the user there is no action' do
-      expect(subject[:response_type]).to be(:ephemeral)
-      expect(subject[:text]).to eq("Too many actions defined")
+      expect(subject[:text]).to eq "Couldn't find a deployment action."
     end
   end
 end