Add tests for the `plan` cycle analytics phase.

Clean up the `issue` tests as well

spec/models/cycle_analytics/issue_spec.rb

@@ -5,15 +5,9 @@ describe 'CycleAnalytics#issue', models: true do
   let(:from_date) { 10.days.ago }
   subject { CycleAnalytics.new(project, from: from_date) }
 
-  context "when calculating the median of times between:
-               start: issue created_at
-                 end: milestone first added to issue
-                      OR
-                      list-label first added to issue
-           " do
   context "when a milestone is added to the issue" do
-      it "calculates the median of available durations" do
-        start_and_end_times = Array.new(5) do
+    it "calculates the median of available durations (between issue creation and milestone addition)" do
+      time_differences = Array.new(5) do
         start_time = Time.now
         end_time = rand(1..10).days.from_now
 
@@ -21,17 +15,18 @@ describe 'CycleAnalytics#issue', models: true do
         issue = Timecop.freeze(start_time) { create(:issue, project: project) }
         Timecop.freeze(end_time) { issue.update(milestone: milestone) }
 
-          [start_time, end_time]
+        end_time - start_time
       end
 
-        median_start_time, median_end_time = start_and_end_times[2]
-        expect(subject.issue).to eq(median_end_time - median_start_time)
+      median_time_difference = time_differences.sort[2]
+      expect(subject.issue).to eq(median_time_difference)
     end
   end
 
   context "when a label is added to the issue" do
-      it "calculates the median of available durations when the label is a list-label" do
-        start_and_end_times = Array.new(5) do
+    context "when the label is a list-label" do
+      it "calculates the median of available durations (between issue creation and label addition)" do
+        time_differences = Array.new(5) do
           start_time = Time.now
           end_time = rand(1..10).days.from_now
 
@@ -39,11 +34,12 @@ describe 'CycleAnalytics#issue', models: true do
           issue = Timecop.freeze(start_time) { create(:issue, project: project) }
           Timecop.freeze(end_time) { issue.update(label_ids: [list_label.id]) }
 
-          [start_time, end_time]
+          end_time - start_time
         end
 
-        median_start_time, median_end_time = start_and_end_times[2]
-        expect(subject.issue).to eq(median_end_time - median_start_time)
+        median_time_difference = time_differences.sort[2]
+        expect(subject.issue).to eq(median_time_difference)
+      end
     end
 
     it "does not make a calculation for regular labels" do
@@ -58,7 +54,7 @@ describe 'CycleAnalytics#issue', models: true do
   end
 
   context "when a milestone and list-label are both added to the issue" do
-      it "uses the time the milestone was added as the 'end time'" do
+    it "calculates the median of available durations (between issue creation and milestone addition)" do
       start_time = Time.now
       milestone_add_time = rand(1..10).days.from_now
       list_label_add_time = rand(1..10).days.from_now
@@ -72,7 +68,6 @@ describe 'CycleAnalytics#issue', models: true do
       expect(subject.issue).to eq(milestone_add_time - start_time)
     end
 
-
     it "does not include issues from other projects" do
       milestone = create(:milestone, project: project)
       list_label = create(:label, lists: [create(:list)])
@@ -95,5 +90,4 @@ describe 'CycleAnalytics#issue', models: true do
       expect(subject.issue).to be_nil
     end
   end
-  end
 end

spec/models/cycle_analytics/plan_spec.rb

+require 'spec_helper'
+
+describe 'CycleAnalytics#plan', feature: true do
+  let(:project) { create(:project) }
+  let(:from_date) { 10.days.ago }
+  let(:user) { create(:user, :admin) }
+  subject { CycleAnalytics.new(project, from: from_date) }
+
+  def create_commit_referencing_issue(issue, time: Time.now)
+    sha = Timecop.freeze(time) { project.repository.commit_file(user, FFaker::Product.brand, "content", "Commit for ##{issue.iid}", "master", false) }
+    commit = project.repository.commit(sha)
+    commit.create_cross_references!
+  end
+
+  context "when a milestone is added to the issue" do
+    context "when the issue is mentioned in a commit" do
+      it "calculates the median of available durations between the two" do
+        time_differences = Array.new(5) do
+          start_time = Time.now
+          end_time = rand(1..10).days.from_now
+
+          milestone = create(:milestone, project: project)
+          issue = create(:issue, project: project)
+
+          Timecop.freeze(start_time) { issue.update(milestone: milestone) }
+          create_commit_referencing_issue(issue, time: end_time)
+
+          end_time - start_time
+        end
+
+        median_time_difference = time_differences.sort[2]
+
+        # Use `be_within` to account for time lost between Rails invoking CLI git
+        # and the commit being created, which Timecop can't freeze.
+        expect(subject.plan).to be_within(2).of(median_time_difference)
+      end
+    end
+  end
+
+  context "when a label is added to the issue" do
+    context "when the issue is mentioned in a commit" do
+      context "when the label is a list-label" do
+        it "calculates the median of available durations between the two" do
+          time_differences = Array.new(5) do
+            start_time = Time.now
+            end_time = rand(1..10).days.from_now
+
+            issue = create(:issue, project: project)
+            list_label = create(:label, lists: [create(:list)])
+
+            Timecop.freeze(start_time) { issue.update(label_ids: [list_label.id]) }
+            create_commit_referencing_issue(issue, time: end_time)
+
+            end_time - start_time
+          end
+
+          median_time_difference = time_differences.sort[2]
+
+          # Use `be_within` to account for time lost between Rails invoking CLI git
+          # and the commit being created, which Timecop can't freeze.
+          expect(subject.plan).to be_within(2).of(median_time_difference)
+        end
+      end
+
+      it "does not make a calculation for regular labels" do
+        5.times do
+          regular_label = create(:label)
+          issue = create(:issue, project: project)
+          issue.update(label_ids: [regular_label.id])
+
+          create_commit_referencing_issue(issue)
+        end
+
+        expect(subject.plan).to be_nil
+      end
+    end
+  end
+
+  context "when a milestone and list-label are both added to the issue" do
+    context "when the issue is mentioned in a commit" do
+      it "calculates the median of available durations between the two (using milestone addition as the 'start_time')" do
+        time_differences = Array.new(5) do
+          label_addition_time = Time.now
+          milestone_addition_time = rand(2..12).hours.from_now
+          end_time = rand(1..10).days.from_now
+
+          issue = create(:issue, project: project)
+          milestone = create(:milestone, project: project)
+          list_label = create(:label, lists: [create(:list)])
+
+          Timecop.freeze(label_addition_time) { issue.update(label_ids: [list_label.id]) }
+          Timecop.freeze(milestone_addition_time) { issue.update(milestone: milestone) }
+          create_commit_referencing_issue(issue, time: end_time)
+
+          end_time - milestone_addition_time
+        end
+
+        median_time_difference = time_differences.sort[2]
+
+        # Use `be_within` to account for time lost between Rails invoking CLI git
+        # and the commit being created, which Timecop can't freeze.
+        expect(subject.plan).to be_within(2).of(median_time_difference)
+      end
+
+      it "does not include issues from other projects" do
+        other_project = create(:project)
+
+        list_label = create(:label, lists: [create(:list)])
+        issue = create(:issue, project: other_project)
+        issue.update(milestone: create(:milestone))
+        issue.update(label_ids: [list_label.id])
+        create_commit_referencing_issue(issue)
+
+        expect(subject.issue).to be_nil
+      end
+
+      it "excludes issues created before the 'from' date" do
+        before_from_date = from_date - 5.days
+
+        milestone = create(:milestone, project: project)
+        list_label = create(:label, lists: [create(:list)])
+        issue = Timecop.freeze(before_from_date) { create(:issue, project: project)}
+        issue.update(milestone: milestone)
+        issue.update(label_ids: [list_label.id])
+        create_commit_referencing_issue(issue)
+
+        expect(subject.issue).to be_nil
+      end
+    end
+  end
+end