Added unit testing

package.json

@@ -3,13 +3,20 @@
   "module": "index.ts",
   "type": "module",
   "devDependencies": {
-    "bun-types": "latest"
+    "@types/jest": "^29.5.11",
+    "@types/supertest": "^6.0.1",
+    "bun-types": "latest",
+    "jest": "^29.7.0",
+    "supertest": "^6.3.3",
+    "ts-jest": "^29.1.1"
   },
   "peerDependencies": {
     "typescript": "^5.0.0"
-  },"scripts": {
+  },
+  "scripts": {
     "start": "bun run src/index.ts",
-    "dev": "bun --hot run src/index.ts"
+    "dev": "bun --hot run src/index.ts",
+    "test": "bun test"
   },
   "dependencies": {
     "@types/express": "^4.17.21",

src/index.ts

@@ -2,7 +2,7 @@ import express from "express";
 import mongoose from "mongoose";
 import ImageModel from "./ImageModel";
 
-const app = express();
+export const app = express();
 
 app.use(express.json());
 

tests/app.test.ts

@@ -0,0 +1,22 @@
+import { describe, expect, it } from "bun:test";
+import request from "supertest";
+import { app } from "../src";
+
+describe("GET /images works properly", () => {
+    it("should be an array", async () => {
+        const res = await request(app).get("/images");
+        expect(Array.isArray(res.body)).toBeTrue();
+        expect(res.statusCode).toBe(200);
+    });
+});
+
+describe("POST /images works properly", () => {
+    it("should return 201 or 409", async () => {
+        const res = await request(app).post("/images").send({
+            url: "https://test.url.com/123",
+            status: "available",
+            tags: ["2girls", "touhou"]
+        });
+        expect(res.status).toSatisfy(status => [201, 409].includes(status));
+    });
+});