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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo
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<!DOCTYPE html>
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<meta charset="utf-8">
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<title>Blob slice overflow</title>
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<link rel="author" title="Intel" href="http://www.intel.com">
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<link rel="help" href="https://w3c.github.io/FileAPI/#dfn-slice">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<div id="log"></div>
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<script>
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var text = '';
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for (var i = 0; i < 2000; ++i) {
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text += 'A';
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}
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test(function() {
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var blob = new Blob([text]);
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var sliceBlob = blob.slice(-1, 2000);
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assert_equals(sliceBlob.size, 2000-(2000-1), "Bolb slice size");
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}, "slice start is negative, relativeStart will be max((size + start), 0)");
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test(function() {
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var blob = new Blob([text]);
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var sliceBlob = blob.slice(2001, 2000);
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assert_equals(sliceBlob.size, 0, "Bolb slice size");
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}, "slice start is greater than blob size, relativeStart will be min(start, size)");
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test(function() {
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var blob = new Blob([text]);
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var sliceBlob = blob.slice(1998, -1);
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assert_equals(sliceBlob.size, (2000-1)-1998, "Bolb slice size");
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}, "slice end is negative, relativeEnd will be max((size + end), 0)");
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test(function() {
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var blob = new Blob([text]);
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var sliceBlob = blob.slice(1998, 2999);
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assert_equals(sliceBlob.size, 2000-1998, "Bolb slice size");
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}, "slice end is greater than blob size, relativeEnd will be min(end, size)");
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</script>
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