add another test to see if the data actually gets scheduled

test/services/NotificationServiceTests.test.ts

@@ -3,6 +3,7 @@ import { NotificationService } from "../../src/services/NotificationService";
 import { UnoptimizedInMemoryRepository } from "../../src/repositories/UnoptimizedInMemoryRepository";
 import fs from "fs";
 import { IEta } from "../../src/entities/entities";
+import { updateGlobalFetchMockJson } from "../testHelpers/fetchMockHelpers";
 
 jest.mock("fs");
 
@@ -49,7 +50,21 @@ describe("NotificationService", () => {
   })
 
   describe("scheduleNotification", () => {
-    it("sends a notification to given shuttle/stop ID when changed", async () => {
+    it("schedules the notification", async () => {
+      // arrange
+      const notificationData = {
+        deviceId: "1",
+        shuttleId: "1",
+        stopId: "1"
+      };
+
+      await notificationService.scheduleNotification(notificationData);
+
+      const isNotificationScheduled = notificationService.isNotificationScheduled(notificationData);
+      expect(isNotificationScheduled).toEqual(true);
+    });
+
+    it("sends and clears correct notification after ETA changed", async () => {
       // Arrange
       const eta: IEta = {
         shuttleId: "1",
@@ -57,20 +72,26 @@ describe("NotificationService", () => {
         secondsRemaining: 120,
       };
 
+      // Simulate 200 + empty object for successful push notification
+      updateGlobalFetchMockJson({});
+
       // Act
-      await notificationService.scheduleNotification({
+      const notificationData = {
         deviceId: "1",
         shuttleId: eta.shuttleId,
         stopId: eta.stopId,
-      });
+      }
+      await notificationService.scheduleNotification(notificationData);
       await repository.addOrUpdateEta(eta);
 
       // Assert
-      // ...that notification (fetch request) was sent
+      expect(fetch as jest.Mock).toHaveBeenCalledTimes(1);
+      const isNotificationScheduled = notificationService.isNotificationScheduled(notificationData);
+      // No longer scheduled after being sent
+      expect(isNotificationScheduled).toBe(false);
     });
 
-    it("clears the notification after delivering successfully", async () => {
-
+    it("leaves notification in array if delivery unsuccessful", async () => {
     });
   });