it("computes next run for cron expression with timezone", () => { // Saturday, Dec 13 2025 00:00:00Z const nowMs = Date.parse("2025-12-13T00:00:00.000Z"); const next = computeNextRunAtMs(
{ kind: "cron", expr: "0 9 * * 3", tz: "America/Los_Angeles" },
nowMs,
); // Next Wednesday at 09:00 PST -> 17:00Z
expect(next).toBe(Date.parse("2025-12-17T17:00:00.000Z"));
});
it("does not roll back year for Asia/Shanghai daily cron schedules (#30351)", () => { // 2026-03-01 08:00:00 in Asia/Shanghai const nowMs = Date.parse("2026-03-01T00:00:00.000Z"); const next = computeNextRunAtMs(
{ kind: "cron", expr: "0 8 * * *", tz: "Asia/Shanghai" },
nowMs,
);
// Next 08:00 local should be the following day, not a past year.
expect(next).toBe(Date.parse("2026-03-02T00:00:00.000Z"));
expect(next).toBeGreaterThan(nowMs);
expect(new Date(next ?? 0).getUTCFullYear()).toBe(2026);
});
it("throws a clear error when cron expr is missing at runtime", () => { const nowMs = Date.parse("2025-12-13T00:00:00.000Z");
expect(() =>
computeNextRunAtMs(
{
kind: "cron",
} as unknown as { kind: "cron"; expr: string; tz?: string },
nowMs,
),
).toThrow("invalid cron schedule: expr is required");
});
it("supports legacy cron field when expr is missing", () => { const nowMs = Date.parse("2025-12-13T00:00:00.000Z"); const next = computeNextRunAtMs(
{
kind: "cron",
cron: "0 9 * * 3",
tz: "America/Los_Angeles",
} as unknown as { kind: "cron"; expr: string; tz?: string },
nowMs,
);
expect(next).toBe(Date.parse("2025-12-17T17:00:00.000Z"));
});
it("computes next run for every schedule", () => { const anchor = Date.parse("2025-12-13T00:00:00.000Z"); const now = anchor + 10_000; const next = computeNextRunAtMs({ kind: "every", everyMs: 30_000, anchorMs: anchor }, now);
expect(next).toBe(anchor + 30_000);
});
it("computes next run for every schedule when anchorMs is not provided", () => { const now = Date.parse("2025-12-13T00:00:00.000Z"); const next = computeNextRunAtMs({ kind: "every", everyMs: 30_000 }, now);
// Should return nowMs + everyMs, not nowMs (which would cause infinite loop)
expect(next).toBe(now + 30_000);
});
it("handles string-typed everyMs and anchorMs from legacy persisted data", () => { const anchor = Date.parse("2025-12-13T00:00:00.000Z"); const now = anchor + 10_000; const next = computeNextRunAtMs(
{
kind: "every",
everyMs: "30000" as unknown as number,
anchorMs: `${anchor}` as unknown as number,
},
now,
);
expect(next).toBe(anchor + 30_000);
});
it("returns undefined for non-numeric string everyMs", () => { const now = Date.now(); const next = computeNextRunAtMs({ kind: "every", everyMs: "abc" as unknown as number }, now);
expect(next).toBeUndefined();
});
it("advances when now matches anchor for every schedule", () => { const anchor = Date.parse("2025-12-13T00:00:00.000Z"); const next = computeNextRunAtMs({ kind: "every", everyMs: 30_000, anchorMs: anchor }, anchor);
expect(next).toBe(anchor + 30_000);
});
it("never returns a past timestamp for Asia/Shanghai daily schedule (#30351)", () => { const nowMs = Date.parse("2026-03-01T00:00:00.000Z"); const next = computeNextRunAtMs(
{ kind: "cron", expr: "0 8 * * *", tz: "Asia/Shanghai" },
nowMs,
);
expect(next).toBeDefined();
expect(next!).toBeGreaterThan(nowMs);
});
it("never returns a previous run that is at-or-after now", () => { const nowMs = Date.parse("2026-03-01T00:00:00.000Z"); const previous = computePreviousRunAtMs(
{ kind: "cron", expr: "0 8 * * *", tz: "Asia/Shanghai" },
nowMs,
); if (previous !== undefined) {
expect(previous).toBeLessThan(nowMs);
}
});
it("reuses compiled cron evaluators for the same expression/timezone", () => { const nowMs = Date.parse("2026-03-01T00:00:00.000Z");
expect(getCronScheduleCacheSizeForTest()).toBe(0);
describe("cron with specific seconds (6-field pattern)", () => { // Pattern: fire at exactly second 0 of minute 0 of hour 12 every day const dailyNoon = { kind: "cron" as const, expr: "0 0 12 * * *", tz: "UTC" }; const noonMs = Date.parse("2026-02-08T12:00:00.000Z");
it("advances past current second when nowMs is exactly at the match", () => { // Fix #14164: must NOT return the current second — that caused infinite // re-fires when multiple jobs triggered simultaneously. const next = computeNextRunAtMs(dailyNoon, noonMs);
expect(next).toBe(noonMs + 86_400_000); // next day
});
it("advances past current second when nowMs is mid-second (.500) within the match", () => { // Fix #14164: returning the current second caused rapid duplicate fires. const next = computeNextRunAtMs(dailyNoon, noonMs + 500);
expect(next).toBe(noonMs + 86_400_000); // next day
});
it("advances past current second when nowMs is late in the matching second (.999)", () => { const next = computeNextRunAtMs(dailyNoon, noonMs + 999);
expect(next).toBe(noonMs + 86_400_000); // next day
});
it("advances to next day once the matching second is fully past", () => { const next = computeNextRunAtMs(dailyNoon, noonMs + 1000);
expect(next).toBe(noonMs + 86_400_000); // next day
});
it("returns today when nowMs is before the match", () => { const next = computeNextRunAtMs(dailyNoon, noonMs - 500);
expect(next).toBe(noonMs);
});
it("advances to next day when job completes within same second it fired (#17821)", () => { // Regression test for #17821: cron jobs that fire and complete within // the same second (e.g., fire at 12:00:00.014, complete at 12:00:00.021) // were getting nextRunAtMs set to the same second, causing a spin loop. // // Simulating: job scheduled for 12:00:00, fires at .014, completes at .021 const completedAtMs = noonMs + 21; // 12:00:00.021 const next = computeNextRunAtMs(dailyNoon, completedAtMs);
expect(next).toBe(noonMs + 86_400_000); // must be next day, NOT noonMs
});
it("advances to next day when job completes just before second boundary (#17821)", () => { // Edge case: job completes at .999, still within the firing second const completedAtMs = noonMs + 999; // 12:00:00.999 const next = computeNextRunAtMs(dailyNoon, completedAtMs);
expect(next).toBe(noonMs + 86_400_000); // next day
});
});
});
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