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tests/quick-logic-test.js

@@ -227,6 +227,8 @@ const AUDIO_INPUTS = {
   ok(copyHelperCode.includes("copyMethod === 'stream'"), 'copy helper supports stream fallback');
   ok(copyHelperCode.includes('bufferSizeMb = 16'), 'copy helper defaults stream buffer to 16 MB');
   ok(copyHelperCode.includes('128'), 'copy helper caps stream buffer size');
+  ok(copyHelperCode.includes('Math.min(Math.floor((copiedBytes / sourceSize) * 100), 99)'), 'native progress reserves 100% for completed copy');
+  ok(copyHelperCode.includes('percent <= lastReportedPercent'), 'copy helper reports each progress percentage once');
 
   // ── Summary ───────────────────────────────────────────────────────────────
   console.log(`\n${'='.repeat(55)}`);