11cb0ef41Sopenharmony_ciasync_test(t => {
21cb0ef41Sopenharmony_ci  // This could be detected as ISO-2022-JP, in which case there would be no
31cb0ef41Sopenharmony_ci  // <textarea>, and thus the script inside would be interpreted as actual
41cb0ef41Sopenharmony_ci  // script.
51cb0ef41Sopenharmony_ci  const blob = new Blob(
61cb0ef41Sopenharmony_ci      [
71cb0ef41Sopenharmony_ci        `aaa\u001B$@<textarea>\u001B(B<script>/* xss */<\/script></textarea>bbb`
81cb0ef41Sopenharmony_ci      ],
91cb0ef41Sopenharmony_ci      {type: 'text/html;charset=utf-8'});
101cb0ef41Sopenharmony_ci  const url = URL.createObjectURL(blob);
111cb0ef41Sopenharmony_ci  const win = window.open(url);
121cb0ef41Sopenharmony_ci  t.add_cleanup(() => {
131cb0ef41Sopenharmony_ci    win.close();
141cb0ef41Sopenharmony_ci  });
151cb0ef41Sopenharmony_ci
161cb0ef41Sopenharmony_ci  win.onload = t.step_func_done(() => {
171cb0ef41Sopenharmony_ci    assert_equals(win.document.charset, 'UTF-8');
181cb0ef41Sopenharmony_ci  });
191cb0ef41Sopenharmony_ci}, 'Blob charset should override any auto-detected charset.');
201cb0ef41Sopenharmony_ci
211cb0ef41Sopenharmony_ciasync_test(t => {
221cb0ef41Sopenharmony_ci  const blob = new Blob(
231cb0ef41Sopenharmony_ci      [`<!doctype html>\n<meta charset="ISO-8859-1">`],
241cb0ef41Sopenharmony_ci      {type: 'text/html;charset=utf-8'});
251cb0ef41Sopenharmony_ci  const url = URL.createObjectURL(blob);
261cb0ef41Sopenharmony_ci  const win = window.open(url);
271cb0ef41Sopenharmony_ci  t.add_cleanup(() => {
281cb0ef41Sopenharmony_ci    win.close();
291cb0ef41Sopenharmony_ci  });
301cb0ef41Sopenharmony_ci
311cb0ef41Sopenharmony_ci  win.onload = t.step_func_done(() => {
321cb0ef41Sopenharmony_ci    assert_equals(win.document.charset, 'UTF-8');
331cb0ef41Sopenharmony_ci  });
341cb0ef41Sopenharmony_ci}, 'Blob charset should override <meta charset>.');
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