1 files changed, 36 insertions, 1 deletions
diff --git a/spec/frontend/diffs/utils/queue_events_spec.js b/spec/frontend/diffs/utils/queue_events_spec.js
index 007748d8b2c..ad2745f5188 100644
--- a/spec/frontend/diffs/utils/queue_events_spec.js
+++ b/spec/frontend/diffs/utils/queue_events_spec.js
@@ -1,11 +1,15 @@
 import api from '~/api';
-import { DEFER_DURATION } from '~/diffs/constants';
+import { DEFER_DURATION, TRACKING_CAP_KEY, TRACKING_CAP_LENGTH } from '~/diffs/constants';
 import { queueRedisHllEvents } from '~/diffs/utils/queue_events';
 
 jest.mock('~/api', () => ({
   trackRedisHllUserEvent: jest.fn(),
 }));
 
+beforeAll(() => {
+  localStorage.clear();
+});
+
 describe('diffs events queue', () => {
   describe('queueRedisHllEvents', () => {
     it('does not dispatch the event immediately', () => {
@@ -17,6 +21,7 @@ describe('diffs events queue', () => {
       queueRedisHllEvents(['know_event']);
       jest.advanceTimersByTime(DEFER_DURATION + 1);
       expect(api.trackRedisHllUserEvent).toHaveBeenCalled();
+      expect(localStorage.getItem(TRACKING_CAP_KEY)).toBe(null);
     });
 
     it('increase defer duration based on the provided events count', () => {
@@ -32,5 +37,35 @@ describe('diffs events queue', () => {
         deferDuration *= index + 1;
       });
     });
+
+    describe('with tracking cap verification', () => {
+      const currentTimestamp = Date.now();
+
+      beforeEach(() => {
+        localStorage.clear();
+      });
+
+      it('dispatches the event if cap value is not found', () => {
+        queueRedisHllEvents(['know_event'], { verifyCap: true });
+        jest.advanceTimersByTime(DEFER_DURATION + 1);
+        expect(api.trackRedisHllUserEvent).toHaveBeenCalled();
+        expect(localStorage.getItem(TRACKING_CAP_KEY)).toBe(currentTimestamp.toString());
+      });
+
+      it('dispatches the event if cap value is less than limit', () => {
+        localStorage.setItem(TRACKING_CAP_KEY, 1);
+        queueRedisHllEvents(['know_event'], { verifyCap: true });
+        jest.advanceTimersByTime(DEFER_DURATION + 1);
+        expect(api.trackRedisHllUserEvent).toHaveBeenCalled();
+        expect(localStorage.getItem(TRACKING_CAP_KEY)).toBe(currentTimestamp.toString());
+      });
+
+      it('does not dispatch the event if cap value is greater than limit', () => {
+        localStorage.setItem(TRACKING_CAP_KEY, currentTimestamp - (TRACKING_CAP_LENGTH + 1));
+        queueRedisHllEvents(['know_event'], { verifyCap: true });
+        jest.advanceTimersByTime(DEFER_DURATION + 1);
+        expect(api.trackRedisHllUserEvent).toHaveBeenCalled();
+      });
+    });
   });
 });