Initial commit

scripts/check-format-display-datetime.js

@@ -0,0 +1,30 @@
+/**
+ * ponytail: assert Tehran display formatting (fixed +03:30).
+ * Run: node scripts/check-format-display-datetime.js
+ *
+ * Standalone copy of offset math — CRA ESM can't require() the helper.
+ * Keep in sync with src/core/helper/formatDisplayDateTime.js
+ */
+const assert = require("assert");
+
+const TEHRAN_UTC_OFFSET_MINUTES = 210;
+
+function formatTehranFromUnixSec(unixSec, pattern) {
+  // 2024-01-15T12:00:00Z → Tehran 15:30
+  const ms = unixSec * 1000 + TEHRAN_UTC_OFFSET_MINUTES * 60 * 1000;
+  const d = new Date(ms);
+  const hh = String(d.getUTCHours()).padStart(2, "0");
+  const mm = String(d.getUTCMinutes()).padStart(2, "0");
+  const ss = String(d.getUTCSeconds()).padStart(2, "0");
+  if (pattern === "time") return `${Number(hh)}:${mm}:${ss}`.replace(/^0/, "") || `${hh}:${mm}:${ss}`;
+  // Just assert hour/minute components for smoke
+  return { hour: d.getUTCHours(), minute: d.getUTCMinutes() };
+}
+
+// 1705320000 = 2024-01-15T12:00:00.000Z → Tehran 15:30
+const parts = formatTehranFromUnixSec(1705320000, "full");
+assert.strictEqual(parts.hour, 15, "Tehran hour for 12:00Z");
+assert.strictEqual(parts.minute, 30, "Tehran minute for 12:00Z");
+assert.strictEqual(TEHRAN_UTC_OFFSET_MINUTES, 210);
+
+console.log("check-format-display-datetime: ok");