Initial commit: KOC LOOP platform

tests/date-utils.test.mjs

@@ -0,0 +1,16 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+import {
+  formatShanghaiDate,
+  parseStoredDate,
+} from "../lib/date-utils.ts";
+
+test("treats D1 CURRENT_TIMESTAMP values as UTC and displays Beijing time", () => {
+  const stored = "2026-07-29 05:36:00";
+  assert.equal(parseStoredDate(stored).toISOString(), "2026-07-29T05:36:00.000Z");
+  assert.match(formatShanghaiDate(stored, true), /07\/29.*13:36/);
+});
+
+test("keeps date-only deadlines on the intended Shanghai calendar date", () => {
+  assert.match(formatShanghaiDate("2026-08-12"), /08\/12/);
+});