add test for old data

test/repositories/ApiBasedRepositoryTests.test.ts

@@ -448,7 +448,34 @@ describe("getShuttleById", () => {
   });
 
   test("getShuttleById returns old data if not expired", async () => {
+    updateGlobalFetchMockJson(genericShuttleDataBySystemId);
 
+    const expectedShuttle = {
+      coordinates: {
+        latitude: 33.791781,
+        longitude: -117.8589646,
+      },
+      name: "08",
+      routeId: "53966",
+      systemId: "1",
+      id: "5577",
+      millisecondsSinceEpoch: Date.now() - 1000,
+    }
+
+    const initialCache: ApiBasedRepositoryCache = {
+      shuttleByShuttleId: {
+        "5577": expectedShuttle
+      }
+    };
+
+    const ttls: ApiBasedRepositoryMillisecondTTLs = {
+      shuttleByShuttleId: 100000,
+    };
+
+    const repository = new ApiBasedRepository(initialCache, ttls);
+    const shuttle = await repository.getShuttleById("5577");
+
+    expect(shuttle).toEqual(expectedShuttle);
   });
 
   test("getShuttleById returns fresh data if expired", async () => {