88 lines
1.9 KiB
JavaScript
88 lines
1.9 KiB
JavaScript
"use strict";
|
|
|
|
const test = require("node:test");
|
|
const assert = require("node:assert/strict");
|
|
const { WalletStore } = require("../src/lib/wallet");
|
|
|
|
test("applies credit and debit transactions", () => {
|
|
const wallet = new WalletStore();
|
|
|
|
wallet.applyTransaction({
|
|
userId: "u1",
|
|
type: "credit",
|
|
amount: 5,
|
|
reason: "topup",
|
|
idempotencyKey: "evt-1",
|
|
});
|
|
|
|
wallet.applyTransaction({
|
|
userId: "u1",
|
|
type: "debit",
|
|
amount: 2,
|
|
reason: "article_generation",
|
|
idempotencyKey: "evt-2",
|
|
});
|
|
|
|
assert.equal(wallet.getBalance("u1"), 3);
|
|
});
|
|
|
|
test("prevents overdraft debits", () => {
|
|
const wallet = new WalletStore();
|
|
assert.throws(() => {
|
|
wallet.applyTransaction({
|
|
userId: "u1",
|
|
type: "debit",
|
|
amount: 1,
|
|
reason: "article_generation",
|
|
idempotencyKey: "evt-3",
|
|
});
|
|
}, /insufficient_credits/);
|
|
});
|
|
|
|
test("is idempotent by idempotency key", () => {
|
|
const wallet = new WalletStore();
|
|
|
|
const first = wallet.applyTransaction({
|
|
userId: "u1",
|
|
type: "credit",
|
|
amount: 4,
|
|
reason: "topup",
|
|
idempotencyKey: "evt-4",
|
|
});
|
|
|
|
const second = wallet.applyTransaction({
|
|
userId: "u1",
|
|
type: "credit",
|
|
amount: 999,
|
|
reason: "topup",
|
|
idempotencyKey: "evt-4",
|
|
});
|
|
|
|
assert.equal(first.id, second.id);
|
|
assert.equal(wallet.getBalance("u1"), 4);
|
|
});
|
|
|
|
test("can restore state from previous snapshot", () => {
|
|
const original = new WalletStore();
|
|
original.applyTransaction({
|
|
userId: "u1",
|
|
type: "credit",
|
|
amount: 3,
|
|
reason: "topup",
|
|
idempotencyKey: "evt-r1",
|
|
});
|
|
|
|
const restored = new WalletStore(original.exportState());
|
|
assert.equal(restored.getBalance("u1"), 3);
|
|
|
|
const duplicate = restored.applyTransaction({
|
|
userId: "u1",
|
|
type: "credit",
|
|
amount: 3,
|
|
reason: "topup",
|
|
idempotencyKey: "evt-r1",
|
|
});
|
|
assert.equal(duplicate.amount, 3);
|
|
assert.equal(restored.getBalance("u1"), 3);
|
|
});
|