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<!DOCTYPE html>
<meta charset="utf-8">
<title>Blob/Unicode interaction: normalization and encoding</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
'use strict';
const OMICRON_WITH_OXIA = '\u1F79'; // NFC normalized to U+3CC
const CONTAINS_UNPAIRED_SURROGATES = 'abc\uDC00def\uD800ghi';
const REPLACED = 'abc\uFFFDdef\uFFFDghi';
function readBlobAsPromise(blob) {
return new Promise((resolve, reject) => {
const reader = new FileReader();
reader.readAsText(blob);
reader.onload = () => resolve(reader.result);
reader.onerror = () => reject(reader.error);
});
}
promise_test(async t => {
const blob = new Blob([OMICRON_WITH_OXIA]);
const result = await readBlobAsPromise(blob);
assert_equals(result, OMICRON_WITH_OXIA, 'String should not be normalized');
}, 'Test that strings are not NFC normalized by Blob constructor');
promise_test(async t => {
const file = new File([OMICRON_WITH_OXIA], 'name');
const result = await readBlobAsPromise(file);
assert_equals(result, OMICRON_WITH_OXIA, 'String should not be normalized');
}, 'Test that strings are not NFC normalized by File constructor');
promise_test(async t => {
const blob = new Blob([CONTAINS_UNPAIRED_SURROGATES]);
const result = await readBlobAsPromise(blob);
assert_equals(result, REPLACED, 'Unpaired surrogates should be replaced.');
}, 'Test that unpaired surrogates are replaced by Blob constructor');
promise_test(async t => {
const file = new File([CONTAINS_UNPAIRED_SURROGATES], 'name');
const result = await readBlobAsPromise(file);
assert_equals(result, REPLACED, 'Unpaired surrogates should be replaced.');
}, 'Test that unpaired surrogates are replaced by File constructor');
</script>
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