template-content-hierarcy.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /html/semantics/scripting-1/the-template-element/template-element/template-content-hierarcy.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta name="author" title="Takayoshi Kochi" href="mailto:kochi@chromium.org">

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

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

<div id=log></div>

<div id="parent">

  <template id="tmpl"><span>Happy Templating!</span></template>

</div>

<script>

test(() => {

  var parent = document.getElementById('parent');

  var tmpl = document.getElementById('tmpl');

  assert_equals(tmpl.innerHTML, '<span>Happy Templating!</span>');

  var span = tmpl.content.querySelector('span');

  // Hierarchy checks at various combinations.

  assert_throws_dom('HierarchyRequestError', () => {

    tmpl.content.appendChild(parent);

  }, 'Template content should throw if any of ancestor is being appended.');

  assert_throws_dom('HierarchyRequestError', () => {

    tmpl.content.appendChild(tmpl);

  }, 'Template content should throw if its host is being appended.');

  assert_throws_dom('HierarchyRequestError', () => {

    span.appendChild(parent);

  }, 'Template content child should throw if any of ancestor is being appended.');

  assert_throws_dom('HierarchyRequestError', () => {

    span.appendChild(tmpl);

  }, 'Template content child should throw template\'s host is being appended.');

}, "Template content should throw when its ancestor is being appended.");

test(() => {

  var parent = document.getElementById('parent');

  var tmpl = document.getElementById('tmpl');

  assert_equals(tmpl.innerHTML, '<span>Happy Templating!</span>');

  var span = tmpl.content.querySelector('span');

  var tmpl_doc = tmpl.content.ownerDocument;

  assert_equals(tmpl.ownerDocument, document);

  assert_not_equals(tmpl_doc, document);

  var new_doc = document.implementation.createHTMLDocument();

  assert_not_equals(new_doc, document);

  assert_not_equals(new_doc, tmpl_doc);

  // Try moving tmpl.content to new_doc and check the results.

  const tmplContentNodeDocument = tmpl.content.ownerDocument;

  const tmplContentAdoptResult = new_doc.adoptNode(tmpl.content);

  assert_equals(tmpl.content, tmplContentAdoptResult);

  assert_equals(tmpl.ownerDocument, document);

  assert_equals(tmpl.content.ownerDocument, tmplContentNodeDocument);

  // Hierarchy checks at various combinations.

  assert_throws_dom('HierarchyRequestError', () => {

    tmpl.content.appendChild(parent);

  }, 'Template content should throw if any of ancestor is being appended.');

  assert_throws_dom('HierarchyRequestError', () => {

    tmpl.content.appendChild(tmpl);

  }, 'Template content should throw if its host is being appended.');

  assert_throws_dom('HierarchyRequestError', () => {

    span.appendChild(parent);

  }, 'Template content child should throw if any of ancestor is being appended.');

  assert_throws_dom('HierarchyRequestError', () => {

    span.appendChild(tmpl);

  }, 'Template content child should throw template\'s host is being appended.');

  // Sanity check: template.content before and after move.

  var tmpl_content_reference = tmpl.content;

  assert_equals(tmpl.content.firstChild, span,

                '<span> should be kept until it is removed, even after ' +

                'adopted to another document.');

  new_doc.body.appendChild(tmpl.content);

  assert_equals(tmpl.content.firstChild, null,

                '<span> should be removed from template content.');

  assert_equals(tmpl_content_reference, tmpl.content,

                'template.content should be identical before and after ' +

                'moving its children.');

}, 'Template content should throw exception when its ancestor in ' +

   'a different document but connected via host is being append.');

</script>