stream-positional-template-child.html

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This test has a WPT meta file that expects 6 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /domparsing/tentative/stream-positional-template-child.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8" />

<title>

  HTML partial updates - template content stream

</title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<body>

  <script>

    for (const safe of [true, false]) {

      for (const method of ["streamAfterHTML", "streamBeforeHTML", "streamReplaceWithHTML"]) {

        const method_name = `${method}${safe ? "" : "Unsafe"}`;

        promise_test(async () => {

          const template = document.createElement("template");

          const child = document.createElement("div");

          template.content.appendChild(child);

          const stream = child[method_name]();

          const writer = stream.getWriter();

          await writer.write('<span>html;</span>');

          await writer.close();

          const expected_length = method === "streamReplaceWithHTML" ? 1 : 2;

          assert_equals(template.content.childNodes.length, expected_length, `Template content has ${expected_length} children`);

          if (method === "streamBeforeHTML" || method === "streamReplaceWithHTML") {

            assert_equals(template.content.childNodes[0].tagName, "SPAN", "First child is span");

          } else {

            assert_equals(template.content.childNodes[1].tagName, "SPAN", "Second child is span");

        }, `${method_name} on a child of a template content`);

  </script>

</body>