third_party/blink/web_tests/http/tests/serviceworker/resources/fetch-canvas-tainting-iframe.html

<script src="/resources/get-host-info.js?pipe=sub"></script>
<script src="test-helpers.js"></script>
<script>
var image_path = base_path() + 'fetch-access-control.php?PNGIMAGE';
var host_info = get_host_info();

var NOT_TAINTED = 'NOT_TAINTED';
var TAINTED = 'TAINTED';
var LOAD_ERROR = 'LOAD_ERROR';

function create_test_case_promise(url, cross_origin) {
  return new Promise(function(resolve) {
      var img = new Image();
      if (cross_origin != '') {
        img.crossOrigin = cross_origin;
      }
      img.onload = function() {
        try {
          var canvas = document.createElement('canvas');
          canvas.width = 100;
          canvas.height = 100;
          var context = canvas.getContext('2d');
          context.drawImage(img, 0, 0);
          context.getImageData(0, 0, 100, 100);
          resolve(NOT_TAINTED);
        } catch (e) {
          resolve(TAINTED);
        }
      };
      img.onerror = function() {
        resolve(LOAD_ERROR);
      }
      img.src = url;
    });
}

function create_test_promise(url, cross_origin, expected_result) {
  return new Promise(function(resolve, reject) {
      create_test_case_promise(url, cross_origin)
        .then(function(result) {
          if (result == expected_result) {
            resolve();
          } else {
            reject('Result of url:' + url + ' ' +
                   ' cross_origin: ' + cross_origin + ' must be ' +
                   expected_result + ' but ' + result);
          }
        })
    });
}

window.addEventListener('message', function(evt) {
    var port = evt.ports[0];
    var image_url = host_info['HTTP_ORIGIN'] + image_path;
    var remote_image_url = host_info['HTTP_REMOTE_ORIGIN'] + image_path;
    Promise.all([
        // Reject tests
        create_test_promise(image_url + '&reject', '', LOAD_ERROR),
        create_test_promise(image_url + '&reject', 'anonymous', LOAD_ERROR),
        create_test_promise(
            image_url + '&reject', 'use-credentials', LOAD_ERROR),
        // Fallback tests
        create_test_promise(
            image_url + '&ignore',
            '',
            NOT_TAINTED),
        create_test_promise(
            remote_image_url + '&ignore',
            '',
            TAINTED),
        create_test_promise(
            remote_image_url + '&ignore',
            'anonymous',
            LOAD_ERROR),
        create_test_promise(
            remote_image_url + '&ACAOrigin=' + host_info['HTTP_ORIGIN'] +
            '&ignore',
            'anonymous',
            NOT_TAINTED),
        create_test_promise(
            remote_image_url + '&ignore',
            'use-credentials',
            LOAD_ERROR),
        create_test_promise(
            remote_image_url + '&ACAOrigin=' + host_info['HTTP_ORIGIN'] +
            '&ignore',
            'use-credentials',
            LOAD_ERROR),
        create_test_promise(
            remote_image_url + '&ACAOrigin=' + host_info['HTTP_ORIGIN'] +
            '&ACACredentials=true&ignore',
            'use-credentials',
            NOT_TAINTED),

        // Credential test (fallback)
        create_test_promise(
            image_url + '&Auth&ignore',
            '',
            NOT_TAINTED),
        create_test_promise(
            remote_image_url + '&Auth&ignore',
            '',
            TAINTED),
        create_test_promise(
            remote_image_url + '&Auth&ignore',
            'anonymous',
            LOAD_ERROR),
        create_test_promise(
            remote_image_url + '&Auth&ignore',
            'use-credentials',
            LOAD_ERROR),
        create_test_promise(
            remote_image_url + '&Auth&ACAOrigin=' + host_info['HTTP_ORIGIN'] +
            '&ignore',
            'use-credentials',
            LOAD_ERROR),
        create_test_promise(
            remote_image_url + '&Auth&ACAOrigin=' + host_info['HTTP_ORIGIN'] +
            '&ACACredentials=true&ignore',
            'use-credentials',
            NOT_TAINTED),

        // Basic response
        create_test_promise(
            image_url +
            '&mode=same-origin&url=' + encodeURIComponent(image_url),
            '',
            NOT_TAINTED),
        create_test_promise(
            image_url +
            '&mode=same-origin&url=' + encodeURIComponent(image_url),
            'anonymous',
            NOT_TAINTED),
        create_test_promise(
            image_url +
            '&mode=same-origin&url=' + encodeURIComponent(image_url),
            'use-credentials',
            NOT_TAINTED),
        create_test_promise(
            remote_image_url +
            '&mode=same-origin&url=' + encodeURIComponent(image_url),
            '',
            NOT_TAINTED),
        create_test_promise(
            remote_image_url +
            '&mode=same-origin&url=' + encodeURIComponent(image_url),
            'anonymous',
            NOT_TAINTED),
        create_test_promise(
            remote_image_url +
            '&mode=same-origin&url=' + encodeURIComponent(image_url),
            'use-credentials',
            NOT_TAINTED),

        // Opaque response
        create_test_promise(
            image_url +
            '&mode=no-cors&url=' + encodeURIComponent(remote_image_url),
            '',
            TAINTED),
        create_test_promise(
            image_url +
            '&mode=no-cors&url=' + encodeURIComponent(remote_image_url),
            'anonymous',
            LOAD_ERROR),
        create_test_promise(
            image_url +
            '&mode=no-cors&url=' + encodeURIComponent(remote_image_url),
            'use-credentials',
            LOAD_ERROR),
        create_test_promise(
            remote_image_url +
            '&mode=no-cors&url=' + encodeURIComponent(remote_image_url),
            '',
            TAINTED),
        create_test_promise(
            remote_image_url +
            '&mode=no-cors&url=' + encodeURIComponent(remote_image_url),
            'anonymous',
            LOAD_ERROR),
        create_test_promise(
            remote_image_url +
            '&mode=no-cors&url=' + encodeURIComponent(remote_image_url),
            'use-credentials',
            LOAD_ERROR),
        
        // CORS response
        create_test_promise(
            image_url +
            '&mode=cors&url=' +
            encodeURIComponent(remote_image_url +
                               '&ACAOrigin=' + host_info['HTTP_ORIGIN']),
            '',
            NOT_TAINTED),
        create_test_promise(
            image_url +
            '&mode=cors&url=' +
            encodeURIComponent(remote_image_url +
                               '&ACAOrigin=' + host_info['HTTP_ORIGIN']),
            'anonymous',
            NOT_TAINTED),
        create_test_promise(
            image_url +
            '&mode=cors&url=' +
            encodeURIComponent(remote_image_url +
                               '&ACAOrigin=' + host_info['HTTP_ORIGIN']),
            'use-credentials',
            NOT_TAINTED),
        create_test_promise(
            image_url +
            '&mode=cors&url=' +
            encodeURIComponent(
                remote_image_url +
                '&ACACredentials=true&ACAOrigin=' + host_info['HTTP_ORIGIN']),
            'use-credentials',
            NOT_TAINTED),
        create_test_promise(
            remote_image_url +
            '&mode=cors&url=' +
            encodeURIComponent(remote_image_url +
                               '&ACAOrigin=' + host_info['HTTP_ORIGIN']),
            '',
            NOT_TAINTED),
        create_test_promise(
            remote_image_url +
            '&mode=cors&url=' +
            encodeURIComponent(remote_image_url +
                               '&ACAOrigin=' + host_info['HTTP_ORIGIN']),
            'anonymous',
            NOT_TAINTED),
        create_test_promise(
            remote_image_url +
            '&mode=cors&url=' +
            encodeURIComponent(remote_image_url +
                               '&ACAOrigin=' + host_info['HTTP_ORIGIN']),
            'use-credentials',
            NOT_TAINTED),
        create_test_promise(
            remote_image_url +
            '&mode=cors&url=' +
            encodeURIComponent(
                remote_image_url +
                '&ACACredentials=true&ACAOrigin=' + host_info['HTTP_ORIGIN']),
            'use-credentials',
            NOT_TAINTED)
      ])
      .then(function() {
          port.postMessage({results: 'finish'});
        })
      .catch(function(e) {
          port.postMessage({results: 'failure:' + e});
        });
  }, false);
</script>