feat: add integration test for economy transfer flow

Tests the full transfer cycle against a real database: debit/credit,
transaction records, insufficient funds rejection, self-transfer
rejection, non-positive amounts, and sequential transfers.

Uses *.integration.test.ts convention — excluded from default test
runs, included with --integration flag in CI.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
syntaxbullet
2026-03-18 13:24:49 +01:00
parent 3f99a77446
commit fc058effd5

View File

@@ -8,6 +8,10 @@ import { economyService } from "./economy.service";
const SENDER_ID = "999000000000000001";
const RECEIVER_ID = "999000000000000002";
// This test requires a real database connection.
// It is excluded from `bun test` by default (*.integration.test.ts pattern)
// and only runs in CI with `--integration` flag, which provides PostgreSQL.
async function cleanupTestUsers() {
// transactions.userId has onDelete: 'cascade', so deleting users removes their transactions
await DrizzleClient.delete(users).where(eq(users.id, BigInt(SENDER_ID)));
@@ -77,16 +81,26 @@ describe("Economy Integration Tests", () => {
expect(receiverTxs[0]!.type).toBe("TRANSFER_IN");
});
it("should reject a transfer when sender has insufficient funds", async () => {
it("should reject transfer with insufficient funds and leave balances unchanged", async () => {
await expect(
economyService.transfer(SENDER_ID, RECEIVER_ID, 2000n)
).rejects.toThrow("Insufficient funds");
// Verify balances are unchanged
// Verify balances unchanged
const sender = await DrizzleClient.query.users.findFirst({
where: eq(users.id, BigInt(SENDER_ID)),
});
const receiver = await DrizzleClient.query.users.findFirst({
where: eq(users.id, BigInt(RECEIVER_ID)),
});
expect(sender!.balance).toBe(1000n);
expect(receiver!.balance).toBe(500n);
// Verify no transaction records were created
const senderTxs = await DrizzleClient.query.transactions.findMany({
where: eq(transactions.userId, BigInt(SENDER_ID)),
});
expect(senderTxs.length).toBe(0);
});
it("should reject a self-transfer", async () => {
@@ -122,30 +136,5 @@ describe("Economy Integration Tests", () => {
// Receiver: 500 + 100 + 200 - 50 = 750
expect(receiver!.balance).toBe(750n);
});
it("should roll back the entire transfer if an error occurs mid-transaction", async () => {
// Attempting to transfer more than balance ensures the transaction aborts
// after the sender check but before any SQL update is committed
const senderBefore = await DrizzleClient.query.users.findFirst({
where: eq(users.id, BigInt(SENDER_ID)),
});
await expect(
economyService.transfer(SENDER_ID, RECEIVER_ID, 9999n)
).rejects.toThrow("Insufficient funds");
const senderAfter = await DrizzleClient.query.users.findFirst({
where: eq(users.id, BigInt(SENDER_ID)),
});
// Balance must be unchanged — no partial debit
expect(senderAfter!.balance).toBe(senderBefore!.balance);
// No transaction records should have been written
const senderTxs = await DrizzleClient.query.transactions.findMany({
where: eq(transactions.userId, BigInt(SENDER_ID)),
});
expect(senderTxs.length).toBe(0);
});
});
});