Adds a way to start multiple manual jobs in stage

- Adds an endpoint on PipelinesController
- Adds a service that iterates over every build in a stage and
plays it.
- Includes 'play_manual' details on EntitySerializer
- Builds a new Stage state: PlayManual. An stage can take this status if
it has manual builds or an skipped, scheduled or manual status
- Includes FE modifications and specs

3 files changed, 60 insertions, 1 deletions

diff --git a/spec/serializers/pipeline_serializer_spec.rb b/spec/serializers/pipeline_serializer_spec.rb
index d9023036534..54e6abc2d3a 100644
--- a/spec/serializers/pipeline_serializer_spec.rb
+++ b/spec/serializers/pipeline_serializer_spec.rb
@@ -156,8 +156,8 @@ describe PipelineSerializer do
 
         it 'verifies number of queries', :request_store do
           recorded = ActiveRecord::QueryRecorder.new { subject }
-
           expected_queries = Gitlab.ee? ? 38 : 31
+
           expect(recorded.count).to be_within(2).of(expected_queries)
           expect(recorded.cached_count).to eq(0)
         end
diff --git a/spec/serializers/stage_entity_spec.rb b/spec/serializers/stage_entity_spec.rb
index 2034c7891ef..6b1185d1283 100644
--- a/spec/serializers/stage_entity_spec.rb
+++ b/spec/serializers/stage_entity_spec.rb
@@ -48,6 +48,10 @@ describe StageEntity do
       expect(subject[:title]).to eq 'test: passed'
     end
 
+    it 'does not contain play_details info' do
+      expect(subject[:status][:action]).not_to be_present
+    end
+
     context 'when the jobs should be grouped' do
       let(:entity) { described_class.new(stage, request: request, grouped: true) }
 
@@ -66,5 +70,29 @@ describe StageEntity do
         end
       end
     end
+
+    context 'with a skipped stage ' do
+      let(:stage) { create(:ci_stage_entity, status: 'skipped') }
+
+      it 'contains play_all_manual' do
+        expect(subject[:status][:action]).to be_present
+      end
+    end
+
+    context 'with a scheduled stage ' do
+      let(:stage) { create(:ci_stage_entity, status: 'scheduled') }
+
+      it 'contains play_all_manual' do
+        expect(subject[:status][:action]).to be_present
+      end
+    end
+
+    context 'with a manual stage ' do
+      let(:stage) { create(:ci_stage_entity, status: 'manual') }
+
+      it 'contains play_all_manual' do
+        expect(subject[:status][:action]).to be_present
+      end
+    end
   end
 end
diff --git a/spec/serializers/stage_serializer_spec.rb b/spec/serializers/stage_serializer_spec.rb
new file mode 100644
index 00000000000..aae17cfbcb9
--- /dev/null
+++ b/spec/serializers/stage_serializer_spec.rb
@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe StageSerializer do
+  let(:project) { create(:project, :repository) }
+  let(:user) { create(:user) }
+  let(:resource) { create(:ci_stage_entity) }
+
+  let(:serializer) do
+    described_class.new(current_user: user, project: project)
+  end
+
+  subject { serializer.represent(resource) }
+
+  describe '#represent' do
+    context 'with a single entity' do
+      it 'serializes the stage object' do
+        expect(subject[:name]).to eq(resource.name)
+      end
+    end
+
+    context 'with an array of entities' do
+      let(:resource) { create_list(:ci_stage_entity, 2) }
+
+      it 'serializes the array of pipelines' do
+        expect(subject).not_to be_empty
+      end
+    end
+  end
+end