From 71ac18cb8d2e2f0f9bc40b7941064bd3b8c1062f Mon Sep 17 00:00:00 2001
From: Brendan Chen <me@bchen.dev>
Date: Thu, 13 Nov 2025 16:43:53 -0800
Subject: [PATCH] Add a similar test for previous hour

---
 ...lfUpdatingETARepositorySharedTests.test.ts | 45 ++++++++++++++++++-
 1 file changed, 44 insertions(+), 1 deletion(-)

diff --git a/src/repositories/shuttle/eta/__tests__/SelfUpdatingETARepositorySharedTests.test.ts b/src/repositories/shuttle/eta/__tests__/SelfUpdatingETARepositorySharedTests.test.ts
index df1dfc7..7be9242 100644
--- a/src/repositories/shuttle/eta/__tests__/SelfUpdatingETARepositorySharedTests.test.ts
+++ b/src/repositories/shuttle/eta/__tests__/SelfUpdatingETARepositorySharedTests.test.ts
@@ -8,7 +8,6 @@ import { RedisShuttleRepository } from "../../RedisShuttleRepository";
 import { UnoptimizedInMemoryShuttleRepository } from "../../UnoptimizedInMemoryShuttleRepository";
 import { setupRouteAndOrderedStopsForShuttleRepository } from "../../../../../testHelpers/setupRouteAndOrderedStopsForShuttleRepository";
 import { ShuttleGetterSetterRepository } from "../../ShuttleGetterSetterRepository";
-import { IRoute, IStop } from "../../../../entities/ShuttleRepositoryEntities";
 
 class RedisSelfUpdatingETARepositoryHolder implements RepositoryHolder<SelfUpdatingETARepository> {
   repo: RedisSelfUpdatingETARepository | undefined;
@@ -203,6 +202,50 @@ describe.each(repositoryImplementations)('$name', (holder) => {
       const eta = await repository.getEtaForShuttleAndStopId(shuttle.id, stop2.id);
       expect(eta?.secondsRemaining).toEqual(8 * 60);
     }, 60000);
+
+    test("uses previous hour fallback calculation when no data available from one day ago", async () => {
+      const { route, systemId, stop1, stop2 } = await setupRouteAndOrderedStops();
+
+      const firstStopLastWeekArrivalTime = new Date(2025, 0, 1, 12, 0, 0);
+      const secondStopLastWeekArrivalTime = new Date(2025, 0, 1, 12, 15, 0);
+      const shuttleSecondArrivalTimeAtFirstStop = new Date(2025, 0, 1, 13, 5, 0);
+      const currentTime = new Date(shuttleSecondArrivalTimeAtFirstStop.getTime() + 7 * 60 * 1000);
+
+      repository.setReferenceTime(currentTime);
+      repository.startListeningForUpdates();
+
+      const shuttle = {
+        id: "sh1",
+        name: "Shuttle 1",
+        routeId: route.id,
+        systemId: systemId,
+        coordinates: stop1.coordinates,
+        orientationInDegrees: 0,
+        updatedTime: new Date(),
+      };
+
+      await shuttleRepository.addOrUpdateShuttle(shuttle, firstStopLastWeekArrivalTime.getTime());
+
+      shuttle.coordinates = stop2.coordinates;
+      await shuttleRepository.addOrUpdateShuttle(shuttle, secondStopLastWeekArrivalTime.getTime());
+
+      shuttle.coordinates = stop1.coordinates;
+      await shuttleRepository.addOrUpdateShuttle(
+        shuttle,
+        shuttleSecondArrivalTimeAtFirstStop.getTime()
+      );
+
+      shuttle.coordinates = { latitude: 12.5, longitude: 22.5 };
+      await shuttleRepository.addOrUpdateShuttle(
+        shuttle,
+        currentTime.getTime()
+      );
+
+      await new Promise((resolve) => setTimeout(resolve, 1000));
+
+      const eta = await repository.getEtaForShuttleAndStopId(shuttle.id, stop2.id);
+      expect(eta?.secondsRemaining).toEqual(8 * 60);
+    });
   });
 
   describe("getAverageTravelTimeSeconds", () => {