Unit test

Author: EmilianoSanchez

src/readiness/__tests__/readinessManager.spec.ts

@@ -221,14 +221,24 @@ test('READINESS MANAGER / Destroy after it was ready but before timedout', () =>
     counter++;
   });
 
+  let lastUpdate = readinessManager.lastUpdate();
+  expect(lastUpdate).toBe(0);
+
   readinessManager.splits.emit(SDK_SPLITS_ARRIVED);
   readinessManager.segments.emit(SDK_SEGMENTS_ARRIVED); // ready state
 
+  expect(readinessManager.lastUpdate()).toBeGreaterThan(lastUpdate);
+  lastUpdate = readinessManager.lastUpdate();
+
   readinessManager.segments.emit(SDK_SEGMENTS_ARRIVED); // fires an update
+  expect(readinessManager.lastUpdate()).toBeGreaterThan(lastUpdate);
+  lastUpdate = readinessManager.lastUpdate();
 
   expect(readinessManager.isDestroyed()).toBe(false);
   readinessManager.destroy(); // Destroy the gate, removing all the listeners and clearing the ready timeout.
   expect(readinessManager.isDestroyed()).toBe(true);
+  expect(readinessManager.lastUpdate()).toBeGreaterThan(lastUpdate);
+
   readinessManager.destroy(); // no-op
   readinessManager.destroy(); // no-op
 

src/readiness/readinessManager.ts

@@ -42,6 +42,7 @@ export function readinessManagerFactory(
   let lastUpdate = 0;
   function syncLastUpdate() {
     const dateNow = Date.now();
+    // ensure lastUpdate is always increasing per event, is case Date.now() is mocked or its value is the same
     lastUpdate = dateNow > lastUpdate ? dateNow : lastUpdate + 1;
   }