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* Tests for UsageStatsStore — snapshot recording, delta computation, aggregation.
*/
import { describe, it, expect, vi, beforeEach } from "vitest";
vi.mock("../../paths.js", () => ({
getDataDir: vi.fn(() => "/tmp/test-data"),
}));
import { UsageStatsStore, type UsageStatsPersistence, type UsageSnapshot } from "../usage-stats.js";
import type { AccountPool } from "../account-pool.js";
function createMockPersistence(initial: UsageSnapshot[] = []): UsageStatsPersistence & { saved: UsageSnapshot[] } {
const store = {
saved: initial,
load: () => ({ version: 1 as const, snapshots: [...initial] }),
save: vi.fn((data: { version: 1; snapshots: UsageSnapshot[] }) => {
store.saved = data.snapshots;
}),
};
return store;
}
function createMockPool(entries: Array<{
status: string;
input_tokens: number;
output_tokens: number;
request_count: number;
}>): AccountPool {
return {
getAllEntries: () =>
entries.map((e, i) => ({
id: `entry-${i}`,
status: e.status,
usage: {
input_tokens: e.input_tokens,
output_tokens: e.output_tokens,
request_count: e.request_count,
},
})),
} as unknown as AccountPool;
}
describe("UsageStatsStore", () => {
let persistence: ReturnType<typeof createMockPersistence>;
let store: UsageStatsStore;
beforeEach(() => {
persistence = createMockPersistence();
store = new UsageStatsStore(persistence);
});
describe("recordSnapshot", () => {
it("records cumulative totals from all accounts", () => {
const pool = createMockPool([
{ status: "active", input_tokens: 1000, output_tokens: 200, request_count: 5 },
{ status: "active", input_tokens: 500, output_tokens: 100, request_count: 3 },
{ status: "expired", input_tokens: 300, output_tokens: 50, request_count: 2 },
]);
store.recordSnapshot(pool);
expect(store.snapshotCount).toBe(1);
expect(persistence.save).toHaveBeenCalledTimes(1);
const saved = persistence.saved;
expect(saved).toHaveLength(1);
expect(saved[0].totals).toEqual({
input_tokens: 1800,
output_tokens: 350,
request_count: 10,
active_accounts: 2,
});
});
it("handles empty pool", () => {
const pool = createMockPool([]);
store.recordSnapshot(pool);
expect(store.snapshotCount).toBe(1);
expect(persistence.saved[0].totals).toEqual({
input_tokens: 0,
output_tokens: 0,
request_count: 0,
active_accounts: 0,
});
});
});
describe("getSummary", () => {
it("returns live totals from pool", () => {
const pool = createMockPool([
{ status: "active", input_tokens: 1000, output_tokens: 200, request_count: 5 },
{ status: "disabled", input_tokens: 500, output_tokens: 100, request_count: 3 },
]);
const summary = store.getSummary(pool);
expect(summary).toEqual({
total_input_tokens: 1500,
total_output_tokens: 300,
total_request_count: 8,
total_accounts: 2,
active_accounts: 1,
});
});
});
describe("getHistory", () => {
it("returns empty for less than 2 snapshots", () => {
expect(store.getHistory(24, "hourly")).toEqual([]);
});
it("computes deltas between consecutive snapshots", () => {
const now = Date.now();
const snapshots: UsageSnapshot[] = [
{
timestamp: new Date(now - 3600_000).toISOString(),
totals: { input_tokens: 100, output_tokens: 20, request_count: 2, active_accounts: 1 },
},
{
timestamp: new Date(now - 1800_000).toISOString(),
totals: { input_tokens: 300, output_tokens: 50, request_count: 5, active_accounts: 1 },
},
{
timestamp: new Date(now).toISOString(),
totals: { input_tokens: 600, output_tokens: 100, request_count: 10, active_accounts: 1 },
},
];
persistence = createMockPersistence(snapshots);
store = new UsageStatsStore(persistence);
const raw = store.getHistory(2, "raw");
expect(raw).toHaveLength(2);
expect(raw[0].input_tokens).toBe(200);
expect(raw[0].output_tokens).toBe(30);
expect(raw[0].request_count).toBe(3);
expect(raw[1].input_tokens).toBe(300);
expect(raw[1].output_tokens).toBe(50);
expect(raw[1].request_count).toBe(5);
});
it("clamps negative deltas to zero (account removal)", () => {
const now = Date.now();
const snapshots: UsageSnapshot[] = [
{
timestamp: new Date(now - 3600_000).toISOString(),
totals: { input_tokens: 1000, output_tokens: 200, request_count: 10, active_accounts: 2 },
},
{
timestamp: new Date(now).toISOString(),
totals: { input_tokens: 500, output_tokens: 100, request_count: 5, active_accounts: 1 },
},
];
persistence = createMockPersistence(snapshots);
store = new UsageStatsStore(persistence);
const raw = store.getHistory(2, "raw");
expect(raw).toHaveLength(1);
expect(raw[0].input_tokens).toBe(0);
expect(raw[0].output_tokens).toBe(0);
expect(raw[0].request_count).toBe(0);
});
it("aggregates into hourly buckets", () => {
const now = Date.now();
const hourStart = Math.floor(now / 3600_000) * 3600_000;
const snapshots: UsageSnapshot[] = [
{
timestamp: new Date(hourStart - 1800_000).toISOString(),
totals: { input_tokens: 0, output_tokens: 0, request_count: 0, active_accounts: 1 },
},
{
timestamp: new Date(hourStart - 900_000).toISOString(),
totals: { input_tokens: 100, output_tokens: 10, request_count: 1, active_accounts: 1 },
},
{
timestamp: new Date(hourStart + 100_000).toISOString(),
totals: { input_tokens: 300, output_tokens: 30, request_count: 3, active_accounts: 1 },
},
{
timestamp: new Date(hourStart + 200_000).toISOString(),
totals: { input_tokens: 500, output_tokens: 50, request_count: 5, active_accounts: 1 },
},
];
persistence = createMockPersistence(snapshots);
store = new UsageStatsStore(persistence);
const hourly = store.getHistory(2, "hourly");
// Two buckets: one before hourStart, one at/after hourStart
expect(hourly).toHaveLength(2);
// Previous hour bucket: delta 0→100 = 100
expect(hourly[0].input_tokens).toBe(100);
// Current hour bucket: delta 100→300 + 300→500 = 200 + 200 = 400
expect(hourly[1].input_tokens).toBe(400);
});
it("filters by time range", () => {
const now = Date.now();
const snapshots: UsageSnapshot[] = [
{
timestamp: new Date(now - 48 * 3600_000).toISOString(), // 48h ago
totals: { input_tokens: 100, output_tokens: 10, request_count: 1, active_accounts: 1 },
},
{
timestamp: new Date(now - 12 * 3600_000).toISOString(), // 12h ago
totals: { input_tokens: 500, output_tokens: 50, request_count: 5, active_accounts: 1 },
},
{
timestamp: new Date(now).toISOString(),
totals: { input_tokens: 1000, output_tokens: 100, request_count: 10, active_accounts: 1 },
},
];
persistence = createMockPersistence(snapshots);
store = new UsageStatsStore(persistence);
// Only last 24h → only the last two snapshots qualify → 1 delta
const raw = store.getHistory(24, "raw");
expect(raw).toHaveLength(1);
expect(raw[0].input_tokens).toBe(500);
});
});
describe("retention", () => {
it("prunes snapshots older than 7 days on record", () => {
const now = Date.now();
const old: UsageSnapshot[] = [
{
timestamp: new Date(now - 8 * 24 * 3600_000).toISOString(), // 8 days ago
totals: { input_tokens: 100, output_tokens: 10, request_count: 1, active_accounts: 1 },
},
{
timestamp: new Date(now - 1 * 3600_000).toISOString(), // 1h ago
totals: { input_tokens: 500, output_tokens: 50, request_count: 5, active_accounts: 1 },
},
];
persistence = createMockPersistence(old);
store = new UsageStatsStore(persistence);
const pool = createMockPool([
{ status: "active", input_tokens: 1000, output_tokens: 100, request_count: 10 },
]);
store.recordSnapshot(pool);
// Old snapshot pruned, recent + new remain
expect(store.snapshotCount).toBe(2);
});
});
});
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