1 files changed, 62 insertions, 0 deletions
diff --git a/spec/lib/gitlab/analytics/unique_visits_spec.rb b/spec/lib/gitlab/analytics/unique_visits_spec.rb
new file mode 100644
index 00000000000..ff3623a3a71
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+++ b/spec/lib/gitlab/analytics/unique_visits_spec.rb
@@ -0,0 +1,62 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Gitlab::Analytics::UniqueVisits, :clean_gitlab_redis_shared_state do
+  let(:unique_visits) { Gitlab::Analytics::UniqueVisits.new }
+  let(:target1_id) { 'g_analytics_contribution' }
+  let(:target2_id) { 'g_analytics_insights' }
+  let(:target3_id) { 'g_analytics_issues' }
+  let(:visitor1_id) { 'dfb9d2d2-f56c-4c77-8aeb-6cddc4a1f857' }
+  let(:visitor2_id) { '1dd9afb2-a3ee-4de1-8ae3-a405579c8584' }
+
+  around do |example|
+    # We need to freeze to a reference time
+    # because visits are grouped by the week number in the year
+    # Without freezing the time, the test may behave inconsistently
+    # depending on which day of the week test is run.
+    reference_time = Time.utc(2020, 6, 1)
+    Timecop.freeze(reference_time) { example.run }
+  end
+
+  describe '#track_visit' do
+    it 'tracks the unique weekly visits for targets' do
+      unique_visits.track_visit(visitor1_id, target1_id, 7.days.ago)
+      unique_visits.track_visit(visitor1_id, target1_id, 7.days.ago)
+      unique_visits.track_visit(visitor2_id, target1_id, 7.days.ago)
+
+      unique_visits.track_visit(visitor2_id, target2_id, 7.days.ago)
+      unique_visits.track_visit(visitor1_id, target2_id, 8.days.ago)
+      unique_visits.track_visit(visitor1_id, target2_id, 15.days.ago)
+
+      expect(unique_visits.weekly_unique_visits_for_target(target1_id)).to eq(2)
+      expect(unique_visits.weekly_unique_visits_for_target(target2_id)).to eq(1)
+
+      expect(unique_visits.weekly_unique_visits_for_target(target2_id, week_of: 15.days.ago)).to eq(1)
+
+      expect(unique_visits.weekly_unique_visits_for_target(target3_id)).to eq(0)
+
+      expect(unique_visits.weekly_unique_visits_for_any_target).to eq(2)
+      expect(unique_visits.weekly_unique_visits_for_any_target(week_of: 15.days.ago)).to eq(1)
+      expect(unique_visits.weekly_unique_visits_for_any_target(week_of: 30.days.ago)).to eq(0)
+    end
+
+    it 'sets the keys in Redis to expire automatically after 28 days' do
+      unique_visits.track_visit(visitor1_id, target1_id)
+
+      Gitlab::Redis::SharedState.with do |redis|
+        redis.scan_each(match: "#{target1_id}-*").each do |key|
+          expect(redis.ttl(key)).to be_within(5.seconds).of(28.days)
+        end
+      end
+    end
+
+    it 'raises an error if an invalid target id is given' do
+      invalid_target_id = "x_invalid"
+
+      expect do
+        unique_visits.track_visit(visitor1_id, invalid_target_id)
+      end.to raise_error("Invalid target id #{invalid_target_id}")
+    end
+  end
+end