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-rw-r--r--testing/web-platform/tests/FileAPI/unicode.html46
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diff --git a/testing/web-platform/tests/FileAPI/unicode.html b/testing/web-platform/tests/FileAPI/unicode.html
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+++ b/testing/web-platform/tests/FileAPI/unicode.html
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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>