1<!DOCTYPE html> 2<meta charset="utf-8"> 3<title>Blob slice overflow</title> 4<link rel="author" title="Intel" href="http://www.intel.com"> 5<link rel="help" href="https://w3c.github.io/FileAPI/#dfn-slice"> 6<script src="/resources/testharness.js"></script> 7<script src="/resources/testharnessreport.js"></script> 8<div id="log"></div> 9<script> 10 11var text = ''; 12 13for (var i = 0; i < 2000; ++i) { 14 text += 'A'; 15} 16 17test(function() { 18 var blob = new Blob([text]); 19 var sliceBlob = blob.slice(-1, blob.size); 20 assert_equals(sliceBlob.size, 1, "Blob slice size"); 21}, "slice start is negative, relativeStart will be max((size + start), 0)"); 22 23test(function() { 24 var blob = new Blob([text]); 25 var sliceBlob = blob.slice(blob.size + 1, blob.size); 26 assert_equals(sliceBlob.size, 0, "Blob slice size"); 27}, "slice start is greater than blob size, relativeStart will be min(start, size)"); 28 29test(function() { 30 var blob = new Blob([text]); 31 var sliceBlob = blob.slice(blob.size - 2, -1); 32 assert_equals(sliceBlob.size, 1, "Blob slice size"); 33}, "slice end is negative, relativeEnd will be max((size + end), 0)"); 34 35test(function() { 36 var blob = new Blob([text]); 37 var sliceBlob = blob.slice(blob.size - 2, blob.size + 999); 38 assert_equals(sliceBlob.size, 2, "Blob slice size"); 39}, "slice end is greater than blob size, relativeEnd will be min(end, size)"); 40 41</script> 42 43