<!DOCTYPE html>
<meta name=timeout content=long>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/get-host-info.sub.js"></script>
<script src="resources/test-helpers.sub.js"></script>
<body>
<script>
var worker = 'resources/fetch-event-test-worker.js';
function wait(ms) {
    return new Promise(resolve => step_timeout(resolve, ms));
}

promise_test(async t => {
    const scope = 'resources/';
    const registration =
        await service_worker_unregister_and_register(t, worker, scope);
    await wait_for_state(t, registration.installing, 'activated');
    promise_test(t => {
        return registration.unregister();
      }, 'restore global state');
  }, 'global setup');

promise_test(t => {
    const page_url = 'resources/simple.html?headers';
    return with_iframe(page_url)
      .then(function(frame) {
          t.add_cleanup(() => { frame.remove(); });
          const headers = JSON.parse(frame.contentDocument.body.textContent);
          const header_names = {};
          for (const [name, value] of headers) {
            header_names[name] = true;
          }

          assert_true(
            header_names.hasOwnProperty('accept'),
            'request includes "Accept" header as inserted by Fetch'
          );
        });
  }, 'Service Worker headers in the request of a fetch event');

promise_test(t => {
    const page_url = 'resources/simple.html?string';
    return with_iframe(page_url)
      .then(function(frame) {
          t.add_cleanup(() => { frame.remove(); });
          assert_equals(
            frame.contentDocument.body.textContent,
            'Test string',
            'Service Worker should respond to fetch with a test string');
          assert_equals(
            frame.contentDocument.contentType,
            'text/plain',
            'The content type of the response created with a string should be text/plain');
          assert_equals(
            frame.contentDocument.characterSet,
            'UTF-8',
            'The character set of the response created with a string should be UTF-8');
        });
  }, 'Service Worker responds to fetch event with string');

promise_test(t => {
    const page_url = 'resources/simple.html?string';
    var frame;
    return with_iframe(page_url)
      .then(function(f) {
        frame = f;
        t.add_cleanup(() => { frame.remove(); });
        return frame.contentWindow.fetch(page_url + "#foo")
      })
      .then(function(response) { return response.text() })
      .then(function(text) {
          assert_equals(
            text,
            'Test string',
            'Service Worker should respond to fetch with a test string');
        });
  }, 'Service Worker responds to fetch event using request fragment with string');

promise_test(t => {
    const page_url = 'resources/simple.html?blob';
    return with_iframe(page_url)
      .then(frame => {
          t.add_cleanup(() => { frame.remove(); });
          assert_equals(
            frame.contentDocument.body.textContent,
            'Test blob',
            'Service Worker should respond to fetch with a test string');
        });
  }, 'Service Worker responds to fetch event with blob body');

promise_test(t => {
    const page_url = 'resources/simple.html?referrer';
      return with_iframe(page_url)
      .then(frame => {
          t.add_cleanup(() => { frame.remove(); });
          assert_equals(
            frame.contentDocument.body.textContent,
            'Referrer: ' + document.location.href,
            'Service Worker should respond to fetch with the referrer URL');
        });
  }, 'Service Worker responds to fetch event with the referrer URL');

promise_test(t => {
    const page_url = 'resources/simple.html?clientId';
    var frame;
    return with_iframe(page_url)
      .then(function(f) {
          frame = f;
          t.add_cleanup(() => { frame.remove(); });
          assert_equals(
            frame.contentDocument.body.textContent,
            'Client ID Not Found',
            'Service Worker should respond to fetch with a client id');
          return frame.contentWindow.fetch('resources/other.html?clientId');
        })
      .then(function(response) { return response.text(); })
      .then(function(response_text) {
          assert_equals(
            response_text.substr(0, 15),
            'Client ID Found',
            'Service Worker should respond to fetch with an existing client id');
        });
  }, 'Service Worker responds to fetch event with an existing client id');

promise_test(t => {
    const page_url = 'resources/simple.html?resultingClientId';
    const expected_found = 'Resulting Client ID Found';
    const expected_not_found = 'Resulting Client ID Not Found';
    return with_iframe(page_url)
      .then(function(frame) {
          t.add_cleanup(() => { frame.remove(); });
          assert_equals(
            frame.contentDocument.body.textContent.substr(0, expected_found.length),
            expected_found,
            'Service Worker should respond with an existing resulting client id for non-subresource requests');
          return frame.contentWindow.fetch('resources/other.html?resultingClientId');
        })
      .then(function(response) { return response.text(); })
      .then(function(response_text) {
          assert_equals(
            response_text.substr(0),
            expected_not_found,
            'Service Worker should respond with an empty resulting client id for subresource requests');
        });
  }, 'Service Worker responds to fetch event with the correct resulting client id');

promise_test(t => {
    const page_url = 'resources/simple.html?ignore';
    return with_iframe(page_url)
      .then(function(frame) {
          t.add_cleanup(() => { frame.remove(); });
          assert_equals(frame.contentDocument.body.textContent,
                        'Here\'s a simple html file.\n',
                        'Response should come from fallback to native fetch');
        });
  }, 'Service Worker does not respond to fetch event');

promise_test(t => {
    const page_url = 'resources/simple.html?null';
    return with_iframe(page_url)
      .then(function(frame) {
          t.add_cleanup(() => { frame.remove(); });
          assert_equals(frame.contentDocument.body.textContent,
                        '',
                        'Response should be the empty string');
        });
  }, 'Service Worker responds to fetch event with null response body');

promise_test(t => {
    const page_url = 'resources/simple.html?fetch';
    return with_iframe(page_url)
      .then(function(frame) {
          t.add_cleanup(() => { frame.remove(); });
          assert_equals(frame.contentDocument.body.textContent,
                        'Here\'s an other html file.\n',
                        'Response should come from fetched other file');
        });
  }, 'Service Worker fetches other file in fetch event');

// Creates a form and an iframe and does a form submission that navigates the
// frame to |action_url|. Returns the frame after navigation.
function submit_form(action_url) {
  return new Promise(resolve => {
      const frame = document.createElement('iframe');
      frame.name = 'post-frame';
      document.body.appendChild(frame);
      const form = document.createElement('form');
      form.target = frame.name;
      form.action = action_url;
      form.method = 'post';
      const input1 = document.createElement('input');
      input1.type = 'text';
      input1.value = 'testValue1';
      input1.name = 'testName1'
      form.appendChild(input1);
      const input2 = document.createElement('input');
      input2.type = 'text';
      input2.value = 'testValue2';
      input2.name = 'testName2'
      form.appendChild(input2);
      document.body.appendChild(form);
      frame.onload = function() {
        form.remove();
        resolve(frame);
      };
      form.submit();
    });
}

promise_test(t => {
    const page_url = 'resources/simple.html?form-post';
    return submit_form(page_url)
      .then(frame => {
          t.add_cleanup(() => { frame.remove(); });
          assert_equals(frame.contentDocument.body.textContent,
                        'POST:application/x-www-form-urlencoded:' +
                        'testName1=testValue1&testName2=testValue2');
        });
  }, 'Service Worker responds to fetch event with POST form');

promise_test(t => {
    // Add '?ignore' so the service worker falls back to network.
    const page_url = 'resources/echo-content.py?ignore';
    return submit_form(page_url)
      .then(frame => {
          t.add_cleanup(() => { frame.remove(); });
          assert_equals(frame.contentDocument.body.textContent,
                        'testName1=testValue1&testName2=testValue2');
        });
  }, 'Service Worker falls back to network in fetch event with POST form');

promise_test(t => {
    const page_url = 'resources/simple.html?multiple-respond-with';
    return with_iframe(page_url)
      .then(frame => {
          t.add_cleanup(() => { frame.remove(); });
          assert_equals(
            frame.contentDocument.body.textContent,
            '(0)(1)[InvalidStateError](2)[InvalidStateError]',
            'Multiple calls of respondWith must throw InvalidStateErrors.');
        });
  }, 'Multiple calls of respondWith must throw InvalidStateErrors');

promise_test(t => {
    const page_url = 'resources/simple.html?used-check';
    var first_frame;
    return with_iframe(page_url)
      .then(function(frame) {
          assert_equals(frame.contentDocument.body.textContent,
                        'Here\'s an other html file.\n',
                        'Response should come from fetched other file');
          first_frame = frame;
          t.add_cleanup(() => { first_frame.remove(); });
          return with_iframe(page_url);
        })
      .then(function(frame) {
          t.add_cleanup(() => { frame.remove(); });
          // When we access to the page_url in the second time, the content of the
          // response is generated inside the ServiceWorker. The body contains
          // the value of bodyUsed of the first response which is already
          // consumed by FetchEvent.respondWith method.
          assert_equals(
            frame.contentDocument.body.textContent,
            'bodyUsed: true',
            'event.respondWith must set the used flag.');
        });
  }, 'Service Worker event.respondWith must set the used flag');

promise_test(t => {
    const page_url = 'resources/simple.html?fragment-check';
    var fragment = '#/some/fragment';
    var first_frame;
    return with_iframe(page_url + fragment)
      .then(function(frame) {
          t.add_cleanup(() => { frame.remove(); });
          assert_equals(
            frame.contentDocument.body.textContent,
            'Fragment Found :' + fragment,
            'Service worker should expose URL fragments in request.');
        });
  }, 'Service Worker should expose FetchEvent URL fragments.');

promise_test(t => {
    const page_url = 'resources/simple.html?cache';
    var frame;
    var cacheTypes = [
      undefined, 'default', 'no-store', 'reload', 'no-cache', 'force-cache', 'only-if-cached'
    ];
    return with_iframe(page_url)
      .then(function(f) {
          frame = f;
          t.add_cleanup(() => { frame.remove(); });
          assert_equals(frame.contentWindow.document.body.textContent, 'default');
          var tests = cacheTypes.map(function(type) {
            return new Promise(function(resolve, reject) {
                var init = {cache: type};
                if (type === 'only-if-cached') {
                  // For privacy reasons, for the time being, only-if-cached
                  // requires the mode to be same-origin.
                  init.mode = 'same-origin';
                }
                return frame.contentWindow.fetch(page_url + '=' + type, init)
                  .then(function(response) { return response.text(); })
                  .then(function(response_text) {
                      var expected = (type === undefined) ? 'default' : type;
                      assert_equals(response_text, expected,
                                    'Service Worker should respond to fetch with the correct type');
                    })
                  .then(resolve)
                  .catch(reject);
              });
          });
          return Promise.all(tests);
        })
      .then(function() {
          return new Promise(function(resolve, reject) {
            frame.addEventListener('load', function onLoad() {
              frame.removeEventListener('load', onLoad);
              try {
                assert_equals(frame.contentWindow.document.body.textContent,
                              'no-cache');
                resolve();
              } catch (e) {
                reject(e);
              }
            });
            frame.contentWindow.location.reload();
          });
        });
  }, 'Service Worker responds to fetch event with the correct cache types');

promise_test(t => {
    const page_url = 'resources/simple.html?eventsource';
    var frame;

    function test_eventsource(opts) {
      return new Promise(function(resolve, reject) {
        var eventSource = new frame.contentWindow.EventSource(page_url, opts);
        eventSource.addEventListener('message', function(msg) {
          eventSource.close();
          try {
            var data = JSON.parse(msg.data);
            assert_equals(data.mode, 'cors',
                          'EventSource should make CORS requests.');
            assert_equals(data.cache, 'no-store',
                          'EventSource should bypass the http cache.');
            var expectedCredentials = opts.withCredentials ? 'include'
                                                           : 'same-origin';
            assert_equals(data.credentials, expectedCredentials,
                          'EventSource should pass correct credentials mode.');
            resolve();
          } catch (e) {
            reject(e);
          }
        });
        eventSource.addEventListener('error', function(e) {
          eventSource.close();
          reject('The EventSource fired an error event.');
        });
      });
    }

    return with_iframe(page_url)
      .then(function(f) {
          frame = f;
          t.add_cleanup(() => { frame.remove(); });
          return test_eventsource({ withCredentials: false });
        })
      .then(function() {
          return test_eventsource({ withCredentials: true });
        });
  }, 'Service Worker should intercept EventSource');

promise_test(t => {
    const page_url = 'resources/simple.html?integrity';
    var frame;
    var integrity_metadata = 'gs0nqru8KbsrIt5YToQqS9fYao4GQJXtcId610g7cCU=';

    return with_iframe(page_url)
      .then(function(f) {
          frame = f;
          t.add_cleanup(() => { frame.remove(); });
          // A request has associated integrity metadata (a string).
          // Unless stated otherwise, it is the empty string.
          assert_equals(
            frame.contentDocument.body.textContent, '');

          return frame.contentWindow.fetch(page_url, {'integrity': integrity_metadata});
        })
      .then(response => {
          return response.text();
        })
      .then(response_text => {
          assert_equals(response_text, integrity_metadata, 'integrity');
        });
  }, 'Service Worker responds to fetch event with the correct integrity_metadata');

// Test that the service worker can read FetchEvent#body when it is a string.
// It responds with request body it read.
promise_test(t => {
    // Set page_url to "?ignore" so the service worker falls back to network
    // for the main resource request, and add a suffix to avoid colliding
    // with other tests.
    const page_url = 'resources/simple.html?ignore-for-request-body-string';
    let frame;

    return with_iframe(page_url)
      .then(f => {
          frame = f;
          t.add_cleanup(() => { frame.remove(); });
          return frame.contentWindow.fetch('simple.html?request-body', {
              method: 'POST',
              body: 'i am the request body'
            });
        })
      .then(response => {
          return response.text();
        })
      .then(response_text => {
          assert_equals(response_text, 'i am the request body');
        });
  }, 'FetchEvent#body is a string');

// Test that the request body is sent to network upon network fallback,
// for a string body.
promise_test(t => {
    // Set page_url to "?ignore" so the service worker falls back to network
    // for the main resource request, and add a suffix to avoid colliding
    // with other tests.
    const page_url = 'resources/?ignore-for-request-body-fallback-string';
    let frame;

    return with_iframe(page_url)
      .then(f => {
          frame = f;
          t.add_cleanup(() => { frame.remove(); });
          // Add "?ignore" so the service worker falls back to echo-content.py.
          const echo_url = '/fetch/api/resources/echo-content.py?ignore';
          return frame.contentWindow.fetch(echo_url, {
              method: 'POST',
              body: 'i am the request body'
            });
        })
      .then(response => {
          return response.text();
        })
      .then(response_text => {
          assert_equals(
              response_text,
              'i am the request body',
              'the network fallback request should include the request body');
        });
  }, 'FetchEvent#body is a string and is passed to network fallback');

// Test that the service worker can read FetchEvent#body when it is a blob.
// It responds with request body it read.
promise_test(t => {
    // Set page_url to "?ignore" so the service worker falls back to network
    // for the main resource request, and add a suffix to avoid colliding
    // with other tests.
    const page_url = 'resources/simple.html?ignore-for-request-body-blob';
    let frame;

    return with_iframe(page_url)
      .then(f => {
          frame = f;
          t.add_cleanup(() => { frame.remove(); });
          const blob = new Blob(['it\'s me the blob', ' ', 'and more blob!']);
          return frame.contentWindow.fetch('simple.html?request-body', {
              method: 'POST',
              body: blob
            });
        })
      .then(response => {
          return response.text();
        })
      .then(response_text => {
          assert_equals(response_text, 'it\'s me the blob and more blob!');
        });
  }, 'FetchEvent#body is a blob');

// Test that the request body is sent to network upon network fallback,
// for a blob body.
promise_test(t => {
    // Set page_url to "?ignore" so the service worker falls back to network
    // for the main resource request, and add a suffix to avoid colliding
    // with other tests.
    const page_url = 'resources/simple.html?ignore-for-request-body-fallback-blob';
    let frame;

    return with_iframe(page_url)
      .then(f => {
          frame = f;
          t.add_cleanup(() => { frame.remove(); });
          const blob = new Blob(['it\'s me the blob', ' ', 'and more blob!']);
          // Add "?ignore" so the service worker falls back to echo-content.py.
          const echo_url = '/fetch/api/resources/echo-content.py?ignore';
          return frame.contentWindow.fetch(echo_url, {
              method: 'POST',
              body: blob
            });
        })
      .then(response => {
          return response.text();
        })
      .then(response_text => {
          assert_equals(
              response_text,
              'it\'s me the blob and more blob!',
              'the network fallback request should include the request body');
        });
  }, 'FetchEvent#body is a blob and is passed to network fallback');

promise_test(async (t) => {
    const page_url = 'resources/simple.html?keepalive';
    const frame = await with_iframe(page_url);
    t.add_cleanup(() => { frame.remove(); });
    assert_equals(frame.contentDocument.body.textContent, 'false');
    const response = await frame.contentWindow.fetch(page_url, {keepalive: true});
    const text = await response.text();
    assert_equals(text, 'true');
  }, 'Service Worker responds to fetch event with the correct keepalive value');

promise_test(async (t) => {
    const page_url = 'resources/simple.html?isReloadNavigation';
    const frame = await with_iframe(page_url);
    t.add_cleanup(() => { frame.remove(); });
    assert_equals(frame.contentDocument.body.textContent,
                  'method = GET, isReloadNavigation = false');
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.contentWindow.location.reload();
    });
    assert_equals(frame.contentDocument.body.textContent,
                  'method = GET, isReloadNavigation = true');
  }, 'FetchEvent#request.isReloadNavigation is true (location.reload())');

promise_test(async (t) => {
    const page_url = 'resources/simple.html?isReloadNavigation';
    const frame = await with_iframe(page_url);
    t.add_cleanup(() => { frame.remove(); });
    assert_equals(frame.contentDocument.body.textContent,
                  'method = GET, isReloadNavigation = false');
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.contentWindow.history.go(0);
    });
    assert_equals(frame.contentDocument.body.textContent,
                  'method = GET, isReloadNavigation = true');
  }, 'FetchEvent#request.isReloadNavigation is true (history.go(0))');

promise_test(async (t) => {
    const page_url = 'resources/simple.html?isReloadNavigation';
    const frame = await with_iframe(page_url);
    t.add_cleanup(() => { frame.remove(); });
    assert_equals(frame.contentDocument.body.textContent,
                  'method = GET, isReloadNavigation = false');
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      const form = frame.contentDocument.createElement('form');
      form.method = 'POST';
      form.name = 'form';
      form.action = new Request(page_url).url;
      frame.contentDocument.body.appendChild(form);
      form.submit();
    });
    assert_equals(frame.contentDocument.body.textContent,
                  'method = POST, isReloadNavigation = false');
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.contentWindow.location.reload();
    });
    assert_equals(frame.contentDocument.body.textContent,
                  'method = POST, isReloadNavigation = true');
  }, 'FetchEvent#request.isReloadNavigation is true (POST + location.reload())');

promise_test(async (t) => {
    const page_url = 'resources/simple.html?isReloadNavigation';
    const anotherUrl = new Request('resources/simple.html').url;
    let frame = await with_iframe(page_url);
    t.add_cleanup(() => { frame.remove(); });
    assert_equals(frame.contentDocument.body.textContent,
                  'method = GET, isReloadNavigation = false');
    // Use step_timeout(0) to ensure the history entry is created for Blink
    // and WebKit. See https://bugs.webkit.org/show_bug.cgi?id=42861.
    await wait(0);
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.src = anotherUrl;
    });
    assert_equals(frame.contentDocument.body.textContent, "Here's a simple html file.\n");
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.contentWindow.history.go(-1);
    });
    assert_equals(frame.contentDocument.body.textContent,
                  'method = GET, isReloadNavigation = false');
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.contentWindow.history.go(0);
    });
    assert_equals(frame.contentDocument.body.textContent,
                  'method = GET, isReloadNavigation = true');
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.contentWindow.history.go(1);
    });
    assert_equals(frame.contentDocument.body.textContent, "Here's a simple html file.\n");
  }, 'FetchEvent#request.isReloadNavigation is true (with history traversal)');

promise_test(async (t) => {
    const page_url = 'resources/simple.html?isHistoryNavigation';
    const anotherUrl = new Request('resources/simple.html?ignore').url;
    const frame = await with_iframe(page_url);
    t.add_cleanup(() => { frame.remove(); });
    assert_equals(frame.contentDocument.body.textContent,
                  'method = GET, isHistoryNavigation = false');
    // Use step_timeout(0) to ensure the history entry is created for Blink
    // and WebKit. See https://bugs.webkit.org/show_bug.cgi?id=42861.
    await wait(0);
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.src = anotherUrl;
    });
    assert_equals(frame.contentDocument.body.textContent, "Here's a simple html file.\n");
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.contentWindow.history.go(-1);
    });
    assert_equals(frame.contentDocument.body.textContent,
                  'method = GET, isHistoryNavigation = true');
  }, 'FetchEvent#request.isHistoryNavigation is true (with history.go(-1))');

promise_test(async (t) => {
    const page_url = 'resources/simple.html?isHistoryNavigation';
    const anotherUrl = new Request('resources/simple.html?ignore').url;
    const frame = await with_iframe(anotherUrl);
    t.add_cleanup(() => { frame.remove(); });
    assert_equals(frame.contentDocument.body.textContent, "Here's a simple html file.\n");
    // Use step_timeout(0) to ensure the history entry is created for Blink
    // and WebKit. See https://bugs.webkit.org/show_bug.cgi?id=42861.
    await wait(0);
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.src = page_url;
    });
    assert_equals(frame.contentDocument.body.textContent,
                  'method = GET, isHistoryNavigation = false');
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.contentWindow.history.go(-1);
    });
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.contentWindow.history.go(1);
    });
    assert_equals(frame.contentDocument.body.textContent,
                  'method = GET, isHistoryNavigation = true');
  }, 'FetchEvent#request.isHistoryNavigation is true (with history.go(1))');

promise_test(async (t) => {
    const page_url = 'resources/simple.html?isHistoryNavigation';
    const anotherUrl = new Request('resources/simple.html?ignore').url;
    const frame =  await with_iframe(anotherUrl);
    t.add_cleanup(() => { frame.remove(); });
    assert_equals(frame.contentDocument.body.textContent, "Here's a simple html file.\n");
    // Use step_timeout(0) to ensure the history entry is created for Blink
    // and WebKit. See https://bugs.webkit.org/show_bug.cgi?id=42861.
    await wait(0);
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.src = page_url;
    });
    assert_equals(frame.contentDocument.body.textContent,
                  'method = GET, isHistoryNavigation = false');
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.contentWindow.history.go(-1);
    });
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.contentWindow.history.go(1);
    });
    assert_equals(frame.contentDocument.body.textContent,
                  'method = GET, isHistoryNavigation = true');
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.contentWindow.history.go(0);
    });
    assert_equals(frame.contentDocument.body.textContent,
                  'method = GET, isHistoryNavigation = false');
  }, 'FetchEvent#request.isHistoryNavigation is false (with history.go(0))');

promise_test(async (t) => {
    const page_url = 'resources/simple.html?isHistoryNavigation';
    const anotherUrl = new Request('resources/simple.html?ignore').url;
    const frame = await with_iframe(anotherUrl);
    t.add_cleanup(() => { frame.remove(); });
    assert_equals(frame.contentDocument.body.textContent, "Here's a simple html file.\n");
    // Use step_timeout(0) to ensure the history entry is created for Blink
    // and WebKit. See https://bugs.webkit.org/show_bug.cgi?id=42861.
    await wait(0);
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.src = page_url;
    });
    assert_equals(frame.contentDocument.body.textContent,
                  'method = GET, isHistoryNavigation = false');
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.contentWindow.history.go(-1);
    });
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.contentWindow.history.go(1);
    });
    assert_equals(frame.contentDocument.body.textContent,
                  'method = GET, isHistoryNavigation = true');
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.contentWindow.location.reload();
    });
    assert_equals(frame.contentDocument.body.textContent,
                  'method = GET, isHistoryNavigation = false');
  }, 'FetchEvent#request.isHistoryNavigation is false (with location.reload)');

promise_test(async (t) => {
    const page_url = 'resources/simple.html?isHistoryNavigation';
    const anotherUrl = new Request('resources/simple.html?ignore').url;
    const oneAnotherUrl = new Request('resources/simple.html?ignore2').url;

    const frame = await with_iframe(page_url);
    t.add_cleanup(() => { frame.remove(); });
    assert_equals(frame.contentDocument.body.textContent,
                  'method = GET, isHistoryNavigation = false');
    // Use step_timeout(0) to ensure the history entry is created for Blink
    // and WebKit. See https://bugs.webkit.org/show_bug.cgi?id=42861.
    await wait(0);
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.src = anotherUrl;
    });
    assert_equals(frame.contentDocument.body.textContent, "Here's a simple html file.\n");
    await wait(0);
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.src = oneAnotherUrl;
    });
    assert_equals(frame.contentDocument.body.textContent, "Here's a simple html file.\n");
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.contentWindow.history.go(-2);
    });
    assert_equals(frame.contentDocument.body.textContent,
                  'method = GET, isHistoryNavigation = true');
  }, 'FetchEvent#request.isHistoryNavigation is true (with history.go(-2))');

promise_test(async (t) => {
    const page_url = 'resources/simple.html?isHistoryNavigation';
    const anotherUrl = new Request('resources/simple.html?ignore').url;
    const oneAnotherUrl = new Request('resources/simple.html?ignore2').url;
    const frame = await with_iframe(anotherUrl);
    t.add_cleanup(() => { frame.remove(); });
    assert_equals(frame.contentDocument.body.textContent, "Here's a simple html file.\n");
    // Use step_timeout(0) to ensure the history entry is created for Blink
    // and WebKit. See https://bugs.webkit.org/show_bug.cgi?id=42861.
    await wait(0);
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.src = oneAnotherUrl;
    });
    assert_equals(frame.contentDocument.body.textContent, "Here's a simple html file.\n");
    await wait(0);
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.src = page_url;
    });
    assert_equals(frame.contentDocument.body.textContent,
                  'method = GET, isHistoryNavigation = false');
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.contentWindow.history.go(-2);
    });
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.contentWindow.history.go(2);
    });
    assert_equals(frame.contentDocument.body.textContent,
                  'method = GET, isHistoryNavigation = true');
  }, 'FetchEvent#request.isHistoryNavigation is true (with history.go(2))');

promise_test(async (t) => {
    const page_url = 'resources/simple.html?isHistoryNavigation';
    const anotherUrl = new Request('resources/simple.html?ignore').url;
    const frame = await with_iframe(page_url);
    t.add_cleanup(() => { frame.remove(); });
    assert_equals(frame.contentDocument.body.textContent,
                  'method = GET, isHistoryNavigation = false');
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      const form = frame.contentDocument.createElement('form');
      form.method = 'POST';
      form.name = 'form';
      form.action = new Request(page_url).url;
      frame.contentDocument.body.appendChild(form);
      form.submit();
    });
    assert_equals(frame.contentDocument.body.textContent,
                  'method = POST, isHistoryNavigation = false');
    // Use step_timeout(0) to ensure the history entry is created for Blink
    // and WebKit. See https://bugs.webkit.org/show_bug.cgi?id=42861.
    await wait(0);
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.src = anotherUrl;
    });
    assert_equals(frame.contentDocument.body.textContent, "Here's a simple html file.\n");
    await wait(0);
    await new Promise((resolve) => {
      frame.addEventListener('load', resolve);
      frame.contentWindow.history.go(-1);
    });
    assert_equals(frame.contentDocument.body.textContent,
                  'method = POST, isHistoryNavigation = true');
  }, 'FetchEvent#request.isHistoryNavigation is true (POST + history.go(-1))');
</script>
</body>