test: add API endpoint tests with Node.js test runner

- Replace the placeholder test script with tsx --test
- Add tests for GET /health response status and payload
- Add tests for GET /ready response status and dependency status
- Use Fastify injection to test endpoints without opening a network listener
- Close the app after the test suite completes

package.json

@@ -4,7 +4,7 @@
   "description": "",
   "main": "index.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1",
+    "test": "tsx --test src/**/*.test.ts",
     "dev": "tsx watch src/server.ts",
     "build": "tsc -p tsconfig.json",
     "start": "node dist/server.js"

src/server.test.ts

@@ -0,0 +1,39 @@
+import assert from "node:assert";
+import { after, describe, it } from "node:test";
+
+import { buildApp } from "./server.js";
+
+describe("API endpoints", () => {
+  const app = buildApp();
+
+  after(async () => {
+    await app.close();
+  });
+
+  it("GET /health returns 200 and status ok", async () => {
+    const response = await app.inject({
+      method: "GET",
+      url: "/health",
+    });
+
+    assert.equal(response.statusCode, 200);
+    assert.deepEqual(response.json(), {
+      status: "ok",
+    });
+  });
+
+  it("GET /ready returns 200 and dependency status", async () => {
+    const response = await app.inject({
+      method: "GET",
+      url: "/ready",
+    });
+
+    assert.equal(response.statusCode, 200);
+    assert.deepEqual(response.json(), {
+      status: "ready",
+      dependencies: {
+        ollama: "not-integrated",
+      },
+    });
+  });
+});