58 lines
1.9 KiB
TypeScript
58 lines
1.9 KiB
TypeScript
import { afterAll, beforeAll, describe, expect, it } from "vitest";
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import {
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daysFromToday,
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dueLabel,
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dueTone,
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localKey,
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monthGrid,
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nextFriday,
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} from "../src/lib/due";
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describe("due helpers read the day they are given", () => {
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it("labels against the given today, not the wall clock", () => {
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expect(dueLabel("2026-08-23", "2026-08-23")).toBe("today");
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expect(dueLabel("2026-08-24", "2026-08-23")).toBe("tomorrow");
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expect(dueLabel("2026-08-22", "2026-08-23")).toBe("yesterday");
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expect(dueLabel("2026-08-23", "2026-08-30")).toBe("Aug 23");
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});
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it("tones against the given today", () => {
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expect(dueTone("2026-08-22", "2026-08-23")).toBe("overdue");
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expect(dueTone("2026-08-24", "2026-08-23")).toBe("soon");
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expect(dueTone("2026-09-24", "2026-08-23")).toBe("normal");
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expect(daysFromToday("2026-09-02", "2026-08-23")).toBe(10);
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});
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it("finds the friday after the given day, never the same one", () => {
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expect(nextFriday("2026-08-23")).toBe("2026-08-28");
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expect(nextFriday("2026-08-28")).toBe("2026-09-04");
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});
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});
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describe("monthGrid steps by calendar day", () => {
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const zone = process.env.TZ;
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beforeAll(() => {
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process.env.TZ = "Europe/Berlin";
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});
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afterAll(() => {
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process.env.TZ = zone;
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});
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it("keeps every day once across the autumn clock change", () => {
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const keys = monthGrid(new Date(2026, 9, 1)).map(localKey);
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expect(keys).toHaveLength(42);
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expect(new Set(keys).size).toBe(42);
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expect(keys[0]).toBe("2026-09-28");
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expect(keys[27]).toBe("2026-10-25");
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expect(keys[28]).toBe("2026-10-26");
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expect(keys[41]).toBe("2026-11-08");
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});
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it("keeps every day once across the spring clock change", () => {
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const keys = monthGrid(new Date(2027, 2, 1)).map(localKey);
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expect(new Set(keys).size).toBe(42);
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expect(keys).toContain("2027-03-28");
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expect(keys).toContain("2027-03-29");
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});
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});
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