stub out getStopById in test for updateEtasForSystemIfTTL

test/repositories/ApiBasedRepositoryTests.test.ts

@@ -4,7 +4,7 @@ import {
   ApiBasedRepositoryCache,
   ApiBasedRepositoryMillisecondTTLs
 } from "../../src/repositories/ApiBasedRepository";
-import { IEta, IShuttle } from "../../src/entities/entities";
+import { IEta, IShuttle, IStop } from "../../src/entities/entities";
 
 /**
  * Update the global fetch function to return a specific object.
@@ -444,21 +444,27 @@ describe("updateEtasForSystemIfTTL", () => {
   test("updateEtasForSystemIfTTL updates all ETA data if data is TTL", async () => {
     updateGlobalFetchMockJson(genericEtaDataByStopId);
 
+    const sampleStop: IStop = {
+      name: "Chapman Court",
+      systemId: "1",
+      id: "177666",
+      coordinates: {
+        latitude: 33.796796,
+        longitude: -117.889293
+      },
+    }
+
     const repository = new ApiBasedRepository();
     repository.getStopsBySystemId = jest.fn(async () => {
       return [
-        {
+        sampleStop
-          name: "Chapman Court",
-          systemId: "1",
-          id: "177666",
-          coordinates: {
-            latitude: 33.796796,
-            longitude: -117.889293
-          },
-        }
       ];
     });
 
+    repository.getStopById = jest.fn(async () => {
+      return sampleStop;
+    });
+
     await repository.updateEtasForSystemIfTTL("1");
 
     const updatedResult = await repository.getEtasForStopId("177666");