<!DOCTYPE html>
<!--
[%provenance%]
-->
<html lang="en">
  <meta charset="utf-8">
  <title>HTTP headers on request for HTML "img" element source</title>
  <script src="/resources/testharness.js"></script>
  <script src="/resources/testharnessreport.js"></script>
  <script src="/fetch/metadata/resources/helper.sub.js"></script>
  <body>
  <script>
  'use strict';

  function induceRequest(url, sourceAttr, attributes) {
    const image = document.createElement('img');

    for (const [ name, value ] of Object.entries(attributes)) {
      image.setAttribute(name, value);
    }

    return new Promise((resolve) => {
        image.setAttribute(sourceAttr, url);
        image.onload = image.onerror = resolve;
      });
  }

  {%- for subtest in subtests %}

  promise_test(() => {
    const key = '{{uuid()}}';

    return induceRequest(
        makeRequestURL(key, [% subtest.origins %]),
        '[%subtest.sourceAttr%]',
        [%subtest.elementAttrs | default({}) | tojson%]
      )
      .then(() => retrieve(key))
      .then((headers) => {
        {%- if subtest.expected == none %}
          assert_not_own_property(headers, '[%subtest.headerName%]');
        {%- else %}
          assert_own_property(headers, '[%subtest.headerName%]');
          assert_array_equals(headers['[%subtest.headerName%]'], ['[%subtest.expected%]']);
        {%- endif %}
        });
  }, '[%subtest.headerName%] - [%subtest.sourceAttr%] - [%subtest.description | pad("end", ", ")%][%subtest.elementAttrs | collection("attributes")%]');

  {%- endfor %}
  </script>
  </body>
</html>
