Test all cycle analytics pre-calculation code.

All the code that pre-calculates metrics for use in the cycle analytics
page.

- Ci::Pipeline -> build start/finish
- Ci::Pipeline#merge_requests
- Issue -> record default metrics after save
- MergeRequest -> record default metrics after save
- Deployment -> Update "first_deployed_to_production_at" for MR metrics
- Git Push -> Update "first commit mention" for issue metrics
- Merge request create/update/refresh -> Update "merge requests closing issues"

1 files changed, 55 insertions, 0 deletions

diff --git a/spec/models/issue/metrics_spec.rb b/spec/models/issue/metrics_spec.rb
new file mode 100644
index 00000000000..df977486943
--- /dev/null
+++ b/spec/models/issue/metrics_spec.rb
@@ -0,0 +1,55 @@
+require 'spec_helper'
+
+describe Issue::Metrics, models: true do
+  let(:project) { create(:project) }
+
+  subject { create(:issue, project: project) }
+
+  describe "when recording the default set of issue metrics on issue save" do
+    context "milestones" do
+      it "records the first time an issue is associated with a milestone" do
+        time = Time.now
+        Timecop.freeze(time) { subject.update(milestone: create(:milestone)) }
+        metrics = subject.metrics
+
+        expect(metrics).to be_present
+        expect(metrics.first_associated_with_milestone_at).to eq(time)
+      end
+
+      it "does not record the second time an issue is associated with a milestone" do
+        time = Time.now
+        Timecop.freeze(time) { subject.update(milestone: create(:milestone)) }
+        Timecop.freeze(time + 2.hours) { subject.update(milestone: nil) }
+        Timecop.freeze(time + 6.hours) { subject.update(milestone: create(:milestone)) }
+        metrics = subject.metrics
+
+        expect(metrics).to be_present
+        expect(metrics.first_associated_with_milestone_at).to eq(time)
+      end
+    end
+
+    context "list labels" do
+      it "records the first time an issue is associated with a list label" do
+        list_label = create(:label, lists: [create(:list)])
+        time = Time.now
+        Timecop.freeze(time) { subject.update(label_ids: [list_label.id]) }
+        metrics = subject.metrics
+
+        expect(metrics).to be_present
+        expect(metrics.first_added_to_board_at).to eq(time)
+      end
+
+      it "does not record the second time an issue is associated with a list label" do
+        time = Time.now
+        first_list_label = create(:label, lists: [create(:list)])
+        Timecop.freeze(time) { subject.update(label_ids: [first_list_label.id]) }
+        second_list_label = create(:label, lists: [create(:list)])
+        Timecop.freeze(time + 5.hours) { subject.update(label_ids: [second_list_label.id]) }
+        metrics = subject.metrics
+
+        expect(metrics).to be_present
+        expect(metrics.first_added_to_board_at).to eq(time)
+      end
+    end
+  end
+end