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idempotency.spec.ts
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idempotency.spec.ts
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import {
HttpHeaderKeysEnum,
Idempotency,
type IdempotencyParams,
type IdempotencyParamsWithDefaults,
} from "../../src";
import { MemoryStorageAdapter } from "@node-idempotency/storage-adapter-memory";
describe("Idempotency (Integration Test)", () => {
let idempotency: Idempotency;
let storage: MemoryStorageAdapter;
beforeEach(() => {
storage = new MemoryStorageAdapter();
idempotency = new Idempotency(storage);
});
// Success Cases
it("should cache request and return response on subsequent request with matching idempotency key", async () => {
const req = {
headers: { [HttpHeaderKeysEnum.IDEMPOTENCY_KEY]: "1" },
path: "/pay",
body: { a: "a" },
method: "POST",
};
const res = { body: { success: "true" } };
const idempotencyRes = await idempotency.onRequest(req);
expect(idempotencyRes).toBeUndefined();
await idempotency.onResponse(req, res);
const cachedResponse = await idempotency.onRequest(req);
expect(cachedResponse).toEqual(res);
});
it("should skip the request when method specified returns true", async () => {
const skipRequest = (request: IdempotencyParamsWithDefaults): boolean => {
return request.method === "POST";
};
let req: IdempotencyParams = {
headers: { [HttpHeaderKeysEnum.IDEMPOTENCY_KEY]: "2" },
path: "/pay",
body: { a: "a" },
method: "POST",
options: {
skipRequest,
},
};
const res = { body: { success: "true" } };
let idempotencyRes = await idempotency.onRequest(req);
expect(idempotencyRes).toBeUndefined();
await idempotency.onResponse(req, res);
let cachedResponse = await idempotency.onRequest(req);
expect(cachedResponse).toBeUndefined();
req = { ...req, method: "GET" };
idempotencyRes = await idempotency.onRequest(req);
expect(idempotencyRes).toBeUndefined();
await idempotency.onResponse(req, res);
cachedResponse = await idempotency.onRequest(req);
expect(cachedResponse).toEqual(res);
});
it("should allow overriding cacheKeyPrefix", async () => {
const req: IdempotencyParams = {
headers: { [HttpHeaderKeysEnum.IDEMPOTENCY_KEY]: "1" },
path: "/pay",
body: { a: "a" },
method: "POST",
options: {
cacheKeyPrefix: "tenant-1",
},
};
const res = { body: { success: "true" } };
const idempotencyRes = await idempotency.onRequest(req);
expect(idempotencyRes).toBeUndefined();
await idempotency.onResponse(req, res);
const cachedResponse = await idempotency.onRequest(req);
expect(cachedResponse).toEqual(res);
expect(
await storage.get(`${req.options?.cacheKeyPrefix}:POST:/pay:1`),
).toEqual(
'{"status":"COMPLETE","fingerPrint":"f45aa7a9803525391d546d331b22b3ed4583a11a04797feaeb1027b158c65d10","response":{"body":{"success":"true"}}}',
);
// different tenant with same idempotency key
const cachedResponse2 = await idempotency.onRequest({
...req,
options: {
cacheKeyPrefix: "tenant-2",
},
});
expect(cachedResponse2).toBeUndefined();
});
// @TODO add more cases
});