unicode.html - mozsearch

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This WPT test may be referenced by the following Test IDs:
- /FileAPI/unicode.html - WPT Dashboard Interop Dashboard

<!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>