Merge branch 'feature/cycle-analytics-events' into 'master'

Cycle Analytics: Events per stage

Adds list of events to each stage:

- Issue: list of issues created in the last XX days, that have been labeled or added to a milestone.
- Plan: list of commits that reference for the fist time an issue from the last stage.
- Code: list of MR created in this stage
- Test: List of unique builds triggered by the commits.
- Review: List of MR merged
- Staging: List of deployed builds
- Production: list of issues with the time from idea to production

Fixes #23449 

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- [ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- Tests
  - [x] Added for this feature/bug
  - [x] 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)

See merge request !6859

1 files changed, 22 insertions, 0 deletions

diff --git a/spec/serializers/analytics_build_serializer_spec.rb b/spec/serializers/analytics_build_serializer_spec.rb
new file mode 100644
index 00000000000..a0a9d9a5f12
--- /dev/null
+++ b/spec/serializers/analytics_build_serializer_spec.rb
@@ -0,0 +1,22 @@
+require 'spec_helper'
+
+describe AnalyticsBuildSerializer do
+  let(:serializer) do
+    described_class
+      .new.represent(resource)
+  end
+
+  let(:json) { serializer.as_json }
+  let(:resource) { create(:ci_build) }
+
+  context 'when there is a single object provided' do
+    it 'it generates payload for single object' do
+      expect(json).to be_an_instance_of Hash
+    end
+
+    it 'contains important elements of analyticsBuild' do
+      expect(json)
+        .to include(:name, :branch, :short_sha, :date, :total_time, :url, :author)
+    end
+  end
+end