test: implement redis unavailibility health check

src/index.ts

@@ -66,7 +66,7 @@ app.onError((err, c) => {
 
 app.get("/health", async (c) => {
 	if (redis.status !== "ready") {
-		return c.json({ status: "error", message: "Redis down" }, 503);
+		return c.json({ status: "error", message: "Redis down", redis: redis.status }, 503);
 	}
 	return c.json({ status: "ok" });
 });

tests/integration/api.test.ts

@@ -35,6 +35,17 @@ describe("API Integration", () => {
 		expect(body.status).toBe("ok");
 	});
 
+	it("should return 503 for health check if redis is down", async () => {
+		redis.status = "connecting";
+
+		const res = await app.request("/health");
+		const body = await res.json();
+
+		expect(res.status).toBe(503);
+		expect(body.status).toBe("error");
+		expect(body.redis).toBe("connecting");
+	});
+
 	it("should return 200 for status with valid API Key", async () => {
 		redis.keys.mockReturnValue(Promise.resolve(["config:trakt"]));
 		redis.get.mockImplementation((key) => {

tests/setup.ts

@@ -8,8 +8,10 @@ process.env.PORT = "3000";
 // Global Redis mock
 mock.module("../src/core/RedisClient", () => ({
 	redis: {
+		status: "ready",
 		get: mock(() => Promise.resolve(null)),
 		set: mock(() => Promise.resolve()),
 		keys: mock(() => Promise.resolve([])),
+		on: mock(() => {}),
 	},
 }));