test.js: accept UNIX seconds/ms and date strings for timestamp arg (fixes #16493) (#16633)

Co-authored-by: waynebruce0x <waynebruce0x@gmail.com>

test.js

@@ -138,9 +138,26 @@ function validateHallmarks(hallmark) {
 
   let unixTimestamp = Math.round(Date.now() / 1000) - 60;
   let chainBlocks = {}
-  const passedTimestamp = process.argv[3] ? Math.floor(new Date(process.argv[3]) / 1000) : undefined
+
+  function parseTimestampArg(arg) {
+    if (!arg) return undefined;
+    // Accept pure numeric input as unix seconds or milliseconds
+    if (/^\d+$/.test(arg)) {
+      const num = Number(arg);
+      if (!Number.isFinite(num)) return undefined;
+      // 13+ digits -> milliseconds, else assume seconds
+      return num > 1e12 ? Math.floor(num / 1000) : num;
+    }
+    // Fallback to Date string parsing (e.g., YYYY-MM-DD)
+    const d = new Date(arg);
+    const ms = d.getTime();
+    if (!Number.isFinite(ms)) return undefined;
+    return Math.floor(ms / 1000);
+  }
+
+  const passedTimestamp = parseTimestampArg(process.argv[3]);
   if (passedTimestamp !== undefined) {
-    unixTimestamp = Number(passedTimestamp)
+    unixTimestamp = passedTimestamp
 
     // other chains than evm will fail to get block at timestamp
     try {