Merge branch '19703-direct-link-pipelines' into 'master'

Resolve "Direct link from pipeline list to builds"

## What does this MR do?
- Adds a dropdown with builds in the mini pipeline graph in the pipelines table
- Unnest a lot of CSS related with pipelines in order to make it reusable

## Screenshots
![Screen_Shot_2016-12-15_at_14.45.41](/uploads/ca1c61842a422a34383e029d668034b7/Screen_Shot_2016-12-15_at_14.45.41.png)
![Screen_Shot_2016-12-15_at_14.45.49](/uploads/952e3277143639ce4ad111103034faeb/Screen_Shot_2016-12-15_at_14.45.49.png)
![Screen_Shot_2016-12-15_at_14.46.02](/uploads/f7369a124b1c3c0db4194de2cb637ef0/Screen_Shot_2016-12-15_at_14.46.02.png)

![graph_animation](/uploads/9bae036cb5acff499f992a4722943d72/graph_animation.gif)

## Does this MR meet the acceptance criteria?

- [x] [Changelog entry](https://docs.gitlab.com/ce/development/changelog.html) added
- [ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [ ] API support added
- Tests
  - [x] Added for this feature/bug
  - [ ] All builds are passing
- [x] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if it does - rebase it please)
- [ ] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?
Closes #25071 
Closes  #19703 

See merge request !8097

2 files changed, 37 insertions, 0 deletions

diff --git a/spec/models/ci/pipeline_spec.rb b/spec/models/ci/pipeline_spec.rb
index 52dd41065e9..dc377d15f15 100644
--- a/spec/models/ci/pipeline_spec.rb
+++ b/spec/models/ci/pipeline_spec.rb
@@ -175,6 +175,30 @@ describe Ci::Pipeline, models: true do
     end
   end
 
+  describe '#stage' do
+    subject { pipeline.stage('test') }
+
+    context 'with status in stage' do
+      before do
+        create(:commit_status, pipeline: pipeline, stage: 'test')
+      end
+
+      it { expect(subject).to be_a Ci::Stage }
+      it { expect(subject.name).to eq 'test' }
+      it { expect(subject.statuses).not_to be_empty }
+    end
+
+    context 'without status in stage' do
+      before do
+        create(:commit_status, pipeline: pipeline, stage: 'build')
+      end
+
+      it 'return stage object' do
+        is_expected.to be_nil
+      end
+    end
+  end
+
   describe 'state machine' do
     let(:current) { Time.now.change(usec: 0) }
     let(:build) { create_build('build1', 0) }
diff --git a/spec/models/ci/stage_spec.rb b/spec/models/ci/stage_spec.rb
index 8fff38f7cda..742bedb37e4 100644
--- a/spec/models/ci/stage_spec.rb
+++ b/spec/models/ci/stage_spec.rb
@@ -28,6 +28,19 @@ describe Ci::Stage, models: true do
     end
   end
 
+  describe '#statuses_count' do
+    before do
+      create_job(:ci_build)
+      create_job(:ci_build, stage: 'other stage')
+    end
+
+    subject { stage.statuses_count }
+
+    it "counts statuses only from current stage" do
+      is_expected.to eq(1)
+    end
+  end
+
   describe '#builds' do
     let!(:stage_build) { create_job(:ci_build) }
     let!(:commit_status) { create_job(:commit_status) }