Reorganize self-updating repository tests based on method name

src/repositories/shuttle/eta/__tests__/SelfUpdatingETARepositorySharedTests.test.ts

@@ -73,7 +73,7 @@ describe.each(repositoryImplementations)('$name', (holder) => {
     return await setupRouteAndOrderedStopsForShuttleRepository(shuttleRepository);
   }
 
-  describe("addOrUpdateShuttle triggers ETA calculations", () => {
+  describe("handleShuttleWillArriveAtStop", () => {
     test("updates how long the shuttle took to get from one stop to another", async () => {
       const { route, systemId, stop2, stop1 } = await setupRouteAndOrderedStops();
 
@@ -109,7 +109,9 @@ describe.each(repositoryImplementations)('$name', (holder) => {
       });
       expect(travelTime).toEqual(15 * 60);
     });
+  });
 
+  describe("handleShuttleUpdate", () =>{ 
     test("adds an ETA entry based on historical data", async () => {
       const { route, systemId, stop1, stop2 } = await setupRouteAndOrderedStops();