Add test case for promise queue

client/src/utils/promise-queue.js

@@ -11,7 +11,7 @@ export class LastQueue {
         this.pendingPromise = false;
     }
 
-    enqueue(action, ...args) {
+    async enqueue(action, ...args) {
         return new Promise((resolve, reject) => {
             this.nextPromise = { action, args, resolve, reject };
             this.dequeue();

client/src/utils/promise-queue.test.js

@@ -0,0 +1,22 @@
+import { LastQueue } from "./promise-queue";
+const x = 10;
+const lastQueue = new LastQueue(x);
+
+async function testPromise(args) {
+    return new Promise((resolve) => resolve(args));
+}
+
+describe("test last-queue", () => {
+    it("should only resolve the first and last promise", async () => {
+        const results = [];
+        for (let i = 0; i < x; i++) {
+            lastQueue.enqueue(testPromise, i).then((response) => {
+                results.push(response);
+            });
+        }
+        await lastQueue.enqueue(testPromise, x).then((response) => {
+            results.push(response);
+        });
+        expect(results).toEqual([0, x]);
+    });
+});