56 lines
2.1 KiB
TypeScript
56 lines
2.1 KiB
TypeScript
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import { describe, it, expect } from "vitest";
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import { localDateTimeToUtcIso } from "../date-utils";
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describe("localDateTimeToUtcIso", () => {
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it("returns null for empty string", () => {
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expect(localDateTimeToUtcIso("")).toBeNull();
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});
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it("returns null for null", () => {
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expect(localDateTimeToUtcIso(null)).toBeNull();
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});
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it("returns null for undefined", () => {
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expect(localDateTimeToUtcIso(undefined)).toBeNull();
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});
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it("returns null for an invalid date string", () => {
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expect(localDateTimeToUtcIso("not-a-date")).toBeNull();
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});
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it("converts a valid datetime-local value and round-trips correctly", () => {
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// The input matches the datetime-local format "YYYY-MM-DDTHH:MM".
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// Regardless of timezone, the resulting ISO string should parse back
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// to the same moment in time.
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const input = "2026-03-11T17:00";
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const result = localDateTimeToUtcIso(input);
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expect(result).not.toBeNull();
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expect(new Date(result!).getTime()).toBe(new Date(input).getTime());
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});
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it("returns a string ending with 'Z' (UTC designator)", () => {
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const result = localDateTimeToUtcIso("2026-03-11T10:00");
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expect(result).not.toBeNull();
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expect(result!.endsWith("Z")).toBe(true);
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});
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it("returns a full ISO-8601 string with milliseconds", () => {
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const result = localDateTimeToUtcIso("2026-06-15T08:30");
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expect(result).not.toBeNull();
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// toISOString() always produces "YYYY-MM-DDTHH:MM:SS.mmmZ"
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expect(result).toMatch(/^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d{3}Z$/);
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});
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it("the returned ISO string is incompatible with datetime-local input format", () => {
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// This documents WHY we need a hidden input instead of setting the
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// datetime-local input's value directly. datetime-local only accepts
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// "YYYY-MM-DDTHH:MM" — a 'Z' suffix makes the value invalid and the
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// browser silently clears the field.
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const result = localDateTimeToUtcIso("2026-03-11T10:00");
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expect(result).not.toBeNull();
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expect(result).toContain("Z");
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// The value does NOT match the datetime-local format (no Z allowed)
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expect(result).not.toMatch(/^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}$/);
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});
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});
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