fixup! src: throw on a malformed localStorage file

Keys are stored as a blob of raw uint16_t memory, so their byte order is
the platform's, but the test fixture wrote them with Buffer's utf16le
encoding. On AIX and s390x the stored key therefore did not match the
one that localStorage.getItem() binds, so the row was not found, no
value was type-checked, and the child exited 0 instead of throwing.

Encode fixture keys in the platform's byte order.

Signed-off-by: Trevor Burnham <trevorburnham@gmail.com>
Assisted-by: Claude Opus 5

Author: TrevorBurnham

test/parallel/test-webstorage.js

@@ -8,6 +8,7 @@ const tmpdir = require('../common/tmpdir');
 const assert = require('node:assert');
 const { join } = require('node:path');
 const { readdir } = require('node:fs/promises');
+const { endianness } = require('node:os');
 const { DatabaseSync } = require('node:sqlite');
 const { test, describe } = require('node:test');
 let cnt = 0;
@@ -193,8 +194,12 @@ describe('a malformed localStorage file throws instead of aborting', () => {
     return file;
   }
 
-  // Keys are stored UTF-16LE, so a real key is needed for lookups to match.
-  const utf16 = (str) => Buffer.from(str, 'utf16le');
+  // Keys are stored as UTF-16 code units in the platform's byte order, so a
+  // key only matches a lookup if it is encoded the same way.
+  const utf16 = (str) => {
+    const buf = Buffer.from(str, 'utf16le');
+    return endianness() === 'BE' ? buf.swap16() : buf;
+  };
 
   for (const [name, fill, expression, detail] of [
     [