Add updated test cases and update call to stop arrival helper

src/repositories/shuttle/__tests__/RedisShuttleRepository.test.ts

@@ -0,0 +1,37 @@
+import { beforeEach, describe, it } from "@jest/globals";
+import { RedisShuttleRepository } from "../RedisShuttleRepository";
+import { afterEach } from "node:test";
+
+describe("RedisShuttleRepository", () => {
+  let repository: RedisShuttleRepository;
+
+  beforeEach(async () => {
+    repository = new RedisShuttleRepository();
+    await repository.connect();
+  });
+
+  afterEach(async () => {
+    await repository.clearAllData();
+    await repository.disconnect();
+  });
+
+  describe("getArrivedStopIfExists", () => {
+    it("gets the stop that the shuttle is currently at, if exists", async () => {
+
+    });
+
+    it("returns undefined if shuttle is not currently at a stop", async () => {
+
+    });
+  });
+
+  describe("getShuttleLastStopArrival", () => {
+    it("gets the shuttle's last stop if existing in the data", async () => {
+      // Use updateShuttleLastStopArrival to populate data
+    });
+
+    it("returns undefined if the data has never been initialized", async () => {
+      
+    });
+  });
+});