From 43a97878ce14b72f0981164f87f2e35e14151312 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 11:22:09 +0200
Subject: Adding upstream version 110.0.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 ...ionList_onconnectionavailable_receiving-ua.html |  92 ++++++
 ...resentationConnection_onclose_receiving-ua.html |  89 ++++++
 ...sentationConnection_onmessage_receiving-ua.html | 108 +++++++
 .../PresentationConnection_send_receiving-ua.html  |  45 +++
 ...sentationConnection_terminate_receiving-ua.html |  23 ++
 .../PresentationReceiver_create_receiving-ua.html  | 328 +++++++++++++++++++++
 ...entationReceiver_create_receiving-ua_child.html | 171 +++++++++++
 ...resentationReceiver_unreached_receiving-ua.html |  21 ++
 .../support/idlharness_receiving-ua.html           |  41 +++
 .../receiving-ua/support/iframe.html               |  22 ++
 .../receiving-ua/support/serviceworker.js          |   9 +
 .../presentation-api/receiving-ua/support/stash.js |  98 ++++++
 .../presentation-api/receiving-ua/support/stash.py |  10 +
 13 files changed, 1057 insertions(+)
 create mode 100644 testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationConnectionList_onconnectionavailable_receiving-ua.html
 create mode 100644 testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationConnection_onclose_receiving-ua.html
 create mode 100644 testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationConnection_onmessage_receiving-ua.html
 create mode 100644 testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationConnection_send_receiving-ua.html
 create mode 100644 testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationConnection_terminate_receiving-ua.html
 create mode 100644 testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationReceiver_create_receiving-ua.html
 create mode 100644 testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationReceiver_create_receiving-ua_child.html
 create mode 100644 testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationReceiver_unreached_receiving-ua.html
 create mode 100644 testing/web-platform/tests/presentation-api/receiving-ua/support/idlharness_receiving-ua.html
 create mode 100644 testing/web-platform/tests/presentation-api/receiving-ua/support/iframe.html
 create mode 100644 testing/web-platform/tests/presentation-api/receiving-ua/support/serviceworker.js
 create mode 100644 testing/web-platform/tests/presentation-api/receiving-ua/support/stash.js
 create mode 100644 testing/web-platform/tests/presentation-api/receiving-ua/support/stash.py

(limited to 'testing/web-platform/tests/presentation-api/receiving-ua/support')
diff --git a/testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationConnectionList_onconnectionavailable_receiving-ua.html b/testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationConnectionList_onconnectionavailable_receiving-ua.html
new file mode 100644
index 0000000000..74d8dfa0ed
--- /dev/null
+++ b/testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationConnectionList_onconnectionavailable_receiving-ua.html
@@ -0,0 +1,92 @@
+<!DOCTYPE html>
+
+<meta charset="utf-8">
+<title>Monitoring incoming presentation connections</title>
+<link rel="author" title="Tomoyuki Shimizu" href="https://github.com/tomoyukilabs">
+<link rel="help" href="https://w3c.github.io/presentation-api/#monitoring-incoming-presentation-connections">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="../common.js"></script>
+<script src="stash.js"></script>
+
+<script>
+  const stash = new Stash(stashIds.toReceiver, stashIds.toController);
+
+  add_completion_callback((tests, status) => {
+    const log = document.getElementById('log');
+    stash.send(JSON.stringify({ type: 'result', tests: tests, status: status, log: log.innerHTML }));
+  });
+
+  promise_test(t => {
+    const receiver = navigator.presentation.receiver;
+    return receiver.connectionList.then(list => {
+      let connections = list.connections;
+      let number = connections.length;
+
+      const checkConnectionList = (connection, action) => {
+        assert_equals(connections.length, number, 'PresentationConnectionList.connections is a frozen array.');
+
+        // Note: When a presentation is terminated, a receiving user agent unloads a document
+        // without firing a "terminate" event.
+        return receiver.connectionList.then(list => {
+          connections = list.connections;
+          if (action === 'close') {
+            assert_true(connections.length === number - 1 && !connections.includes(connection),
+              'A closed presentation connection is removed from the set of presentation controllers.');
+          } else if (action === 'connect') {
+            assert_true(connections.length === number + 1 && connections.includes(connection),
+              'A new presentation connection is added to the set of presentation controllers.');
+          }
+          number = connections.length;
+        });
+      };
+
+      const checkEvent = evt => {
+        assert_true(evt instanceof PresentationConnectionAvailableEvent, 'An event using PresentationConnectionAvailableEvent is fired.');
+        assert_true(evt.isTrusted, 'The event is a trusted event.');
+        assert_false(evt.bubbles, 'The event does not bubbles.');
+        assert_false(evt.cancelable, 'The event is not cancelable.');
+        assert_equals(evt.type, 'connectionavailable', 'The event name is "connectionavailable".');
+        assert_equals(evt.target, list, 'event.target is the presentation connection list.');
+        assert_true(evt.connection instanceof PresentationConnection, 'event.connection is a presentation connection.');
+
+        return checkConnectionList(evt.connection, 'connect');
+      };
+
+      const watchEvent = (obj, watcher, type) => {
+        const watchHandler = new Promise(resolve => {
+          obj['on' + type] = evt => { resolve(evt); };
+        });
+        return Promise.all([ watchHandler, watcher.wait_for(type) ]).then(results => {
+          assert_equals(results[0], results[1], 'Both on' + type + ' and addEventListener pass the same event object.');
+          return results[0];
+        });
+      };
+
+      // Step 1: check the first connection in "connected" state
+      let connection = list.connections[0];
+      assert_equals(number, 1, 'A presentation connection list is populated with a first presentation connection.');
+      assert_true(list instanceof PresentationConnectionList, 'navigator.presentation.receiver.connectionList is resolved with a presentation connection list.');
+      assert_true(list.connections instanceof Array, 'A presentation connection list is an array.');
+      assert_true(connection instanceof PresentationConnection, 'A presentation connection is added to a presentation connection list.');
+
+      // Step 2: check the connection in "closed" state
+      stash.send(JSON.stringify({ type: 'ok' }));
+      let eventWatcher = new EventWatcher(t, connection, 'close');
+      return eventWatcher.wait_for('close').then(() => {
+        return checkConnectionList(connection, 'close');
+      })
+      // Step 3: check the first connection when reconnected
+      .then(() => {
+        stash.send(JSON.stringify({ type: 'ok' }));
+        eventWatcher = new EventWatcher(t, list, 'connectionavailable');
+        return watchEvent(list, eventWatcher, 'connectionavailable')
+      }).then(checkEvent)
+      // Step 4: check the second connection (with <iframe>) in "connected" state
+      .then(() => {
+        stash.send(JSON.stringify({ type: 'ok' }));
+        return watchEvent(list, eventWatcher, 'connectionavailable')
+      }).then(checkEvent);
+    });
+  });
+</script>
diff --git a/testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationConnection_onclose_receiving-ua.html b/testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationConnection_onclose_receiving-ua.html
new file mode 100644
index 0000000000..7194c6f4d9
--- /dev/null
+++ b/testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationConnection_onclose_receiving-ua.html
@@ -0,0 +1,89 @@
+<!DOCTYPE html>
+
+<meta charset="utf-8">
+<title>Closing a PresentationConnection</title>
+<link rel="author" title="Tomoyuki Shimizu" href="https://github.com/tomoyukilabs">
+<link rel="help" href="https://w3c.github.io/presentation-api/#closing-a-presentationconnection">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="../common.js"></script>
+<script src="stash.js"></script>
+
+<script>
+  const stash = new Stash(stashIds.toReceiver, stashIds.toController);
+
+  add_completion_callback((tests, status) => {
+    const log = document.getElementById('log');
+    stash.send(JSON.stringify({ type: 'result', tests: tests, status: status, log: log.innerHTML }));
+  });
+
+  const checkCloseEvent = (evt, connection, reason) => {
+    assert_true(evt instanceof PresentationConnectionCloseEvent, 'An event using PresentationConnectionCloseEvent is fired.');
+    assert_true(evt.isTrusted, 'The event is a trusted event.');
+    assert_false(evt.bubbles, 'The event does not bubbles.');
+    assert_false(evt.cancelable, 'The event is not cancelable.');
+    assert_equals(evt.type, 'close', 'The event name is "close".');
+    assert_equals(evt.target, connection, 'event.target is the presentation connection.');
+    assert_equals(connection.state, 'closed', 'State of the presentation connection is "closed".');
+    assert_equals(evt.reason, reason, 'The reason for closing the presentation connection is "' + reason + '".');
+  };
+
+  const watchEvent = (obj, watcher, type) => {
+    const watchHandler = new Promise(resolve => {
+      obj['on' + type] = evt => { resolve(evt); };
+    });
+    return Promise.all([ watchHandler, watcher.wait_for(type) ]).then(results => {
+      assert_equals(results[0], results[1], 'Both on' + type + ' and addEventListener pass the same event object.');
+      return results[0];
+    });
+  };
+
+  promise_test(t => {
+    return navigator.presentation.receiver.connectionList.then(list => {
+      let connection = list.connections[0];
+      assert_equals(list.connections.length, 1, 'A presentation connection list is populated with a first presentation connection.');
+
+      // Step 1: close the presentation connection in "connected" state
+      connection.close();
+      let watchClose = new EventWatcher(t, connection, 'close');
+      const watchNewConnection = new EventWatcher(t, list, 'connectionavailable');
+      return watchEvent(connection, watchClose, 'close').then(evt => {
+        checkCloseEvent(evt, connection, 'closed');
+
+        // Step 2: check a connection closed by the controlling user agent
+        stash.send(JSON.stringify({ type: 'ok' }));
+        return watchNewConnection.wait_for('connectionavailable');
+      }).then(evt => {
+        connection = evt.connection;
+        watchClose = new EventWatcher(t, connection, 'close');
+        return watchEvent(connection, watchClose, 'close');
+      }).then(evt => {
+        checkCloseEvent(evt, connection, 'closed');
+
+        // Step 3: try to close the presentation connection in "closed" state (nothing should happen)
+        connection.close();
+        return Promise.race([
+          new Promise(resolve => { t.step_timeout(resolve, 1000); }),
+          watchEvent(connection, watchClose, 'close').then(() => {
+            assert_unreached('Invoking PresentationConnection.close() in the "closed" state causes nothing.'); })
+        ]);
+      }).then(() => {
+
+        // Step 4: check a connection closed due to aborting the nested browsing context
+        stash.send(JSON.stringify({ type: 'ok' }));
+        return watchNewConnection.wait_for('connectionavailable');
+      }).then(evt => {
+        connection = evt.connection;
+        stash.send(JSON.stringify({ type: 'ok' }));
+        watchClose = new EventWatcher(t, connection, 'close');
+        return Promise.race([
+          watchEvent(connection, watchClose, 'close'),
+          new Promise(resolve => { t.step_timeout(() => { resolve(null); }, 3000); })
+        ]);
+      }).then(evt => {
+        assert_true(!!evt, 'A presentation connection is closed when its controller\'s browsing context is discarded.');
+        checkCloseEvent(evt, connection, 'wentaway');
+      });
+    });
+  });
+</script>
diff --git a/testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationConnection_onmessage_receiving-ua.html b/testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationConnection_onmessage_receiving-ua.html
new file mode 100644
index 0000000000..0734a5570c
--- /dev/null
+++ b/testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationConnection_onmessage_receiving-ua.html
@@ -0,0 +1,108 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Receiving a message through PresentationConnection</title>
+<link rel="author" title="Tomoyuki Shimizu" href="https://github.com/tomoyukilabs/">
+<link rel="help" href="http://w3c.github.io/presentation-api/#receiving-a-message-through-presentationconnection">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="../common.js"></script>
+<script src="stash.js"></script>
+
+<script>
+setup({explicit_timeout: true});
+
+const message1 = '1st';
+const message2 = '2nd';
+const message3 = new Uint8Array([51, 114, 100]);      // "3rd"
+const message4 = new Uint8Array([52, 116, 104]);      // "4th"
+const message5 = new Uint8Array([108, 97, 115, 116]); // "last"
+
+const toUint8Array = buf => {
+  return buf instanceof ArrayBuffer ? new Uint8Array(buf) : buf;
+}
+
+// compare two ArrayBuffer or Uint8Array
+const compare = (a, b) => {
+  const p = toUint8Array(a);
+  const q = toUint8Array(b);
+  return !!p && !!q && p.every((item, index) => { return item === q[index]; });
+};
+
+const stash = new Stash(stashIds.toReceiver, stashIds.toController);
+
+add_completion_callback((tests, status) => {
+  const log = document.getElementById('log');
+  stash.send(JSON.stringify({ type: 'result', tests: tests, status: status, log: log.innerHTML }));
+});
+
+navigator.presentation.receiver.connectionList.then(list => {
+  const checkEvent = event => {
+    assert_true(event.isTrusted, 'a trusted event is fired');
+    assert_true(event instanceof MessageEvent, 'The event uses the MessageEvent interface');
+    assert_false(event.bubbles, 'the event does not bubble');
+    assert_false(event.cancelable, 'the event is not cancelable');
+  };
+
+  const watchEvent = (obj, watcher, type) => {
+    const watchHandler = new Promise(resolve => {
+      obj['on' + type] = evt => { resolve(evt); };
+    });
+    return Promise.all([ watchHandler, watcher.wait_for(type) ]).then(results => {
+      assert_equals(results[0], results[1], 'Both on' + type + ' and addEventListener pass the same event object.');
+      return results[0];
+    });
+  };
+
+  const connection = list.connections[0];
+
+  promise_test(t => {
+    t.step_timeout(() => {
+      t.force_timeout();
+      t.done();
+    }, 3000);
+
+    assert_equals(connection.binaryType, 'arraybuffer', 'the default value of binaryType is "arraybuffer"');
+    const eventWatcher = new EventWatcher(t, connection, 'message');
+    return eventWatcher.wait_for('message').then(event => {
+      checkEvent(event);
+      assert_equals(event.data, message1, 'receive a string correctly');
+      return watchEvent(connection, eventWatcher, 'message');
+    }).then(event => {
+      checkEvent(event);
+      assert_equals(event.data, message2, 'receive a string correctly');
+      return watchEvent(connection, eventWatcher, 'message');
+    }).then(event => {
+      checkEvent(event);
+      assert_true(event.data instanceof ArrayBuffer, 'receive binary data as ArrayBuffer');
+      assert_true(compare(event.data, message3), 'receive an ArrayBuffer correctly (originally a Blob at a controlling user agent)');
+      return watchEvent(connection, eventWatcher, 'message');
+    }).then(event => {
+      checkEvent(event);
+      assert_true(event.data instanceof ArrayBuffer, 'receive binary data as ArrayBuffer');
+      assert_true(compare(event.data, message4), 'receive an ArrayBuffer correctly (originally an ArrayBuffer at a controlling user agent)');
+      return watchEvent(connection, eventWatcher, 'message');
+    }).then(event => {
+      checkEvent(event);
+      assert_true(event.data instanceof ArrayBuffer, 'receive binary data as ArrayBuffer');
+      assert_true(compare(event.data, message5), 'receive an ArrayBuffer correctly (originally an ArrayBufferView at a controlling user agent)');
+
+      connection.binaryType = 'blob';
+      return Promise.all([
+        stash.send(JSON.stringify({ type: 'blob' })),
+        watchEvent(connection, eventWatcher, 'message')
+      ]).then(results => results[1]);
+    }).then(event => {
+      assert_true(event.data instanceof Blob, 'receive binary data as Blob');
+      return new Promise((resolve, reject) => {
+          const reader = new FileReader();
+          reader.onload = resolve;
+          reader.onerror = reject;
+          reader.readAsArrayBuffer(event.data);
+      });
+    }).then(event => {
+      assert_true(compare(event.target.result, message5), 'receive a Blob correctly');
+      connection.terminate();
+    });
+  });
+});
+</script>
diff --git a/testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationConnection_send_receiving-ua.html b/testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationConnection_send_receiving-ua.html
new file mode 100644
index 0000000000..bc482e9dfd
--- /dev/null
+++ b/testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationConnection_send_receiving-ua.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+
+<meta charset="utf-8">
+<title>Sending a message through PresentationConnection</title>
+<link rel="author" title="Tomoyuki Shimizu" href="https://github.com/tomoyukilabs/">
+<link rel="help" href="http://w3c.github.io/presentation-api/#sending-a-message-through-presentationconnection">
+<script src="../common.js"></script>
+<script src="stash.js"></script>
+
+<script>
+const stash = new Stash(stashIds.toReceiver, stashIds.toController);
+
+navigator.presentation.receiver.connectionList.then(list => {
+  const connection = list.connections[0];
+
+  const message1 = '1st';
+  const message2 = '2nd';
+  const message3 = new Uint8Array([51, 114, 100]);      // "3rd"
+  const message4 = new Uint8Array([52, 116, 104]);      // "4th"
+  const message5 = new Uint8Array([108, 97, 115, 116]); // "last"
+
+  // send messages
+  return stash.receive().then(() => {
+    connection.send(message1);              // string
+    connection.send(message2);              // string
+    connection.send(new Blob([message3]));  // Blob
+    connection.send(message4.buffer);       // ArrayBuffer
+    connection.send(message5);              // ArrayBufferView
+
+    return stash.receive();
+  }).then(() => {
+    // try to send a message in the "closed" state
+    // Note: a receiving user agent does not fire a "terminate" event
+    connection.close();
+    connection.onclose = () => {
+      try {
+        connection.send(message1);
+        stash.send(JSON.stringify({ type: 'ok' }));
+      } catch (e) {
+        stash.send(JSON.stringify({ type: 'error', name: e.name, message: e.message }));
+      }
+    };
+  });
+});
+</script>
diff --git a/testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationConnection_terminate_receiving-ua.html b/testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationConnection_terminate_receiving-ua.html
new file mode 100644
index 0000000000..3a234aaa83
--- /dev/null
+++ b/testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationConnection_terminate_receiving-ua.html
@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+
+<meta charset="utf-8">
+<title>Terminating a presentation in a receiving browsing context</title>
+<link rel="author" title="Tomoyuki Shimizu" href="https://github.com/tomoyukilabs/">
+<link rel="help" href="https://w3c.github.io/presentation-api/#terminating-a-presentation-in-a-receiving-browsing-context">
+<script src="../common.js"></script>
+<script src="stash.js"></script>
+
+<script>
+  const stash = new Stash(stashIds.toReceiver, stashIds.toController);
+
+  navigator.presentation.receiver.connectionList.then(list => {
+    const connection = list.connections[0];
+
+    // terminate a presentation when two presentation connections become "connected"
+    list.onconnectionavailable = evt => {
+      connection.terminate();
+
+      stash.sendBeacon({ type: (window.closed ? 'ok' : 'error') });
+    };
+  });
+</script>
diff --git a/testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationReceiver_create_receiving-ua.html b/testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationReceiver_create_receiving-ua.html
new file mode 100644
index 0000000000..53f7601442
--- /dev/null
+++ b/testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationReceiver_create_receiving-ua.html
@@ -0,0 +1,328 @@
+<!DOCTYPE html>
+
+<meta charset="utf-8">
+<title>Creating a receiving browsing context</title>
+<link rel="author" title="Tomoyuki Shimizu" href="https://github.com/tomoyukilabs/">
+<link rel="help" href="https://w3c.github.io/presentation-api/#creating-a-receiving-browsing-context">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="../common.js"></script>
+<script src="stash.js"></script>
+<style>
+a { visibility: hidden; }
+iframe { width: 100%; }
+</style>
+
+<iframe id="child" src="PresentationReceiver_create_receiving-ua_child.html"></iframe>
+<p id="notice">Checking <code id="modal"></code>: if you see this message, please wait for test to time out.</p>
+<a href="PresentationReceiver_unreached_receiving-ua.html">do not navigate</a>
+<script>
+let finished = false;
+
+const sendResult = (test, status) => {
+    if(!finished) {
+        finished = true;
+        const stash = new Stash(stashIds.toReceiver, stashIds.toController);
+        stash.send(JSON.stringify({ test: test, status: status }));
+    }
+};
+
+add_completion_callback((tests, status) => {
+    // note: a single test result is supposed to appear here.
+    sendResult(tests[0], status);
+});
+
+const child = document.getElementById('child');
+child.addEventListener('load', () => {
+    const notice = document.getElementById('notice');
+    const modal = document.getElementById('modal');
+
+    const dbName = {
+        controller: 'db-presentation-api-controlling-ua',
+        receiver: 'db-presentation-api-receiving-ua'
+    };
+
+    promise_test(t => {
+        t.add_cleanup(() => {
+            document.cookie = cookieName + '=False;Expires=' + new Date().toUTCString();
+            document.cookie = cookieNameChild + '=False;Expires=' + new Date().toUTCString();
+            sessionStorage.removeItem(storageName);
+            localStorage.removeItem(storageName);
+            sessionStorage.removeItem(storageNameChild);
+            localStorage.removeItem(storageNameChild);
+
+            Object.values(dbName).forEach(name => {
+                indexedDB.deleteDatabase(name);
+            });
+
+            if ('serviceWorker' in navigator) {
+                navigator.serviceWorker.getRegistrations().then(registrations => {
+                    return Promise.all(registrations.map(reg => reg.unregister()));
+                });
+            }
+            if ('caches' in window) {
+                caches.keys().then(keys => {
+                    return Promise.all(keys.map(key => caches.delete(key)));
+                });
+            }
+        });
+
+        // Session history
+        assert_equals(window.history.length, 1, 'Session history consists of the current page only.');
+
+        // The Sandboxed auxiliary navigation browsing context flag
+        assert_equals(window.open('PresentationReceiver_unreached_receiving-ua.html'), null, 'Sandboxed auxiliary navigation browsing context flag is set.');
+
+        // The sandboxed top-level navigation browsing context flag (codes below are expected to be ignored)
+        window.close();
+        document.querySelector('a').click();
+        location.href = 'PresentationReceiver_unreached_receiving-ua.html';
+
+        // The sandboxed modals flag (codes below are expected to be ignored):
+        // If user agent prompts user, a timeout will occur and the test will eventually fail
+        let message = 'If you see this prompt, do not dismiss it and wait for test to time out.';
+        notice.style.display = 'block';
+        modal.textContent = 'alert()';
+        alert(message);
+        modal.textContent = 'confirm()';
+        confirm(message);
+        modal.textContent = 'print()';
+        print();
+        modal.textContent = 'prompt()';
+        prompt(message);
+        notice.style.display = 'none';
+
+        // Permissions
+        const checkPermission = query => {
+            return navigator.permissions ? navigator.permissions.query(query).then(status => {
+                assert_equals(status.state, 'denied', 'The state of the "' + query.name + '" permission is set to "denied".');
+            }, () => { /* skip this assertion if the specified permission is not implemented */ }) : Promise.resolve();
+        }
+
+        // Cookie
+        assert_equals(document.cookie, '', 'A cookie store is set to an empty store.')
+
+        // Indexed Database
+        const checkIndexedDB = () => {
+            if ('indexedDB' in window) {
+                // The test would fail when the database is already created by the controlling UA
+                const req = indexedDB.open(dbName.controller);
+                const upgradeneededWatcher = new EventWatcher(t, req, 'upgradeneeded');
+                const successWatcher = new EventWatcher(t, req, 'success');
+                return Promise.race([
+                    upgradeneededWatcher.wait_for('upgradeneeded').then(evt => {
+                        evt.target.result.close();
+                        const req = indexedDB.open(dbName.receiver, 2);
+                        const eventWatcher = new EventWatcher(t, req, 'upgradeneeded');
+                        return eventWatcher.wait_for('upgradeneeded');
+                    }).then(evt => {
+                        evt.target.result.close();
+                    }),
+                    successWatcher.wait_for('success').then(evt => {
+                        evt.target.result.close();
+                        // This would fail if the database created by the controlling UA is visible to the receiving UA
+                        assert_unreached('Indexed Database is set to an empty storage.');
+                    })
+                ]);
+            }
+            else
+                return Promise.resolve();
+        };
+
+        // Web Storage
+        assert_equals(sessionStorage.length, 0, 'Session storage is set to an empty storage.');
+        assert_equals(localStorage.length, 0, 'Local storage is set to an empty storage.');
+
+        // Service Workers
+        const checkServiceWorkers = () => {
+            return 'serviceWorker' in navigator ? navigator.serviceWorker.getRegistrations().then(registrations => {
+                assert_equals(registrations.length, 0, 'List of registered service worker registrations is empty.');
+            }) : Promise.resolve();
+        };
+        const checkCaches = () => {
+            return 'caches' in window ? caches.keys().then(keys => {
+                assert_equals(keys.length, 0, 'Cache storage is empty.')
+            }) : Promise.resolve();
+        };
+
+        // Navigation
+        const checkNavigation = () => {
+            return navigator.presentation.receiver.connectionList.then(connectionList => {
+                assert_equals(connectionList.connections.length, 1, 'The initial number of presentation connections is one');
+                assert_equals(location.href, connectionList.connections[0].url, 'A receiving browsing context is navigated to the presentation URL.');
+            });
+        };
+
+        // Update storages and service workers shared with the top-level brosing context
+        const cookieName = 'PresentationApiTest';
+        const cookieValue = 'Receiving-UA';
+        const storageName = 'presentation_api_test';
+        const storageValue = 'receiving-ua';
+        document.cookie = cookieName + '=' + cookieValue;
+        sessionStorage.setItem(storageName, storageValue);
+        localStorage.setItem(storageName, storageValue);
+
+        // Service Workers and Caches
+        const cacheName = 'receiving-ua';
+        const getClientUrls = () => {
+            return new Promise(resolve => {
+                navigator.serviceWorker.getRegistration().then(reg => {
+                    const channel = new MessageChannel();
+                    channel.port1.onmessage = event => {
+                        resolve(event.data);
+                    };
+                    reg.active.postMessage('test', [channel.port2]);
+                });
+            });
+        };
+
+        const registerServiceWorker = () => {
+            return ('serviceWorker' in navigator ?
+                navigator.serviceWorker.register('../serviceworker.js').then(registration => {
+                    return new Promise((resolve, reject) => {
+                        if (registration.installing) {
+                            registration.installing.addEventListener('statechange', event => {
+                                if(event.target.state === 'installed')
+                                    resolve();
+                            });
+                        }
+                        else
+                            resolve();
+                    });
+                }) : Promise.resolve()).then(getClientUrls).then(urls => {
+                    assert_true(urls.every(url => { return url !== new Request('../PresentationReceiver_create-manual.https.html').url }),
+                                'A window client in a controlling user agent is not accessible to a service worker on a receiving user agent.');
+                });
+        };
+
+        const openCaches = () => {
+            return 'caches' in window ? caches.open(cacheName).then(cache => cache.add('../cache.txt')) : Promise.resolve();
+        };
+
+        const getChildFrameResult = () => {
+            return new Promise(resolve => {
+                window.addEventListener('message', t.step_func(event => {
+                    const result = event.data;
+                    if (result.type === 'presentation-api') {
+                        // if the test in iframe failed, report the result and abort the test
+                        if (result.test.status === 0)
+                            resolve();
+                        else {
+                            sendResult(result.test, result.status);
+                            assert_unreached('A test for a nested browsing context failed.');
+                        }
+                    }
+                }));
+                child.contentWindow.postMessage('start', location.origin);
+            });
+        };
+
+        // check the results from updates by iframe
+        const cookieNameChild = 'NestedBrowsingContext';
+        const cookieValueChild = 'True';
+        const storageNameChild = 'nested_browsing_context';
+        const storageValueChild = 'yes';
+
+        const checkUpdatedResult = () => {
+            // cookie
+            const cookies = document.cookie.split(/;\s*/).reduce((result, item) => {
+                const t = item.split('=');
+                result[t[0]] = t[1];
+                return result;
+            }, {});
+            message = 'A cookie store is shared by top-level and nested browsing contexts.'
+            assert_equals(Object.keys(cookies).length, 2, message);
+            assert_equals(cookies[cookieName], cookieValue, message);
+            assert_equals(cookies[cookieNameChild], cookieValueChild, message);
+
+            // Web Storage
+            message = 'Session storage is shared by top-level and nested browsing contexts.';
+            assert_equals(sessionStorage.length, 2, message);
+            assert_equals(sessionStorage.getItem(storageName), storageValue, message);
+            assert_equals(sessionStorage.getItem(storageNameChild), storageValueChild, message);
+            message = 'Local storage is shared by top-level and nested browsing contexts.';
+            assert_equals(localStorage.length, 2, message);
+            assert_equals(localStorage.getItem(storageName), storageValue, message);
+            assert_equals(localStorage.getItem(storageNameChild), storageValueChild, message);
+        };
+
+        // Indexed Database
+        const checkUpdatedIndexedDB = () => {
+            if ('indexedDB' in window) {
+                message = 'Indexed Database is shared by top-level and nested browsing contexts.';
+                const req = indexedDB.open(dbName.receiver);
+                const upgradeneededWatcher = new EventWatcher(t, req, 'upgradeneeded');
+                const successWatcher = new EventWatcher(t, req, 'success');
+                return Promise.race([
+                    upgradeneededWatcher.wait_for('upgradeneeded').then(evt => {
+                        evt.target.result.close();
+                        // Check if the version of the database is upgraded to 3 by the nested browsing context
+                        assert_unreached(message);
+                    }),
+                    successWatcher.wait_for('success').then(evt => {
+                        const db = evt.target.result;
+                        const version = db.version;
+                        db.close();
+                        // Check if the version of the database is upgraded to 3 by the nested browsing context
+                        assert_equals(version, 3, message);
+                    })
+                ]);
+            }
+            else
+                return Promise.resolve();
+        };
+
+        // Service Workers
+        const checkUpdatedServiceWorkers = () => {
+            return 'serviceWorker' in window ? navigator.serviceWorker.getRegistrations().then(registrations => {
+                message = 'List of registered service worker registrations is shared by top-level and nested browsing contexts.';
+                assert_equals(registrations.length, 2, message);
+                const scriptURLs = registrations.map(reg => { return reg.active.scriptURL; }).sort();
+                assert_equals(scriptURLs[0], new Request('../serviceworker.js').url, message);
+                assert_equals(scriptURLs[1], new Request('serviceworker.js').url, message);
+            }) : Promise.resolve();
+        };
+        const cacheNameChild = 'nested-browsing-context';
+        const checkUpdatedCaches = () => {
+            message = 'Cache storage is shared by top-level and nested browsing contexts.';
+            return 'caches' in window ? caches.keys().then(keys => {
+                assert_equals(keys.length, 2, message);
+                const cacheKeys = keys.sort();
+                assert_equals(cacheKeys[0], cacheNameChild, message);
+                assert_equals(cacheKeys[1], cacheName, message);
+                return Promise.all(keys.map(
+                    key => caches.open(key)
+                        .then(cache => cache.matchAll())
+                        .then(responses => {
+                            assert_equals(responses.length, 1, message);
+                            assert_equals(responses[0].url, new Request('../cache.txt').url, message);
+                        })));
+            }) : Promise.resolve();
+        };
+
+        // Asynchronous tests
+        const permissionList = [
+            { name: 'geolocation' },
+            { name: 'notifications' },
+            { name: 'push', userVisibleOnly: true },
+            { name: 'midi' },
+            { name: 'camera' },
+            { name: 'microphone' },
+            { name: 'speaker' },
+            { name: 'background-sync' }
+        ];
+        return Promise.all(permissionList.map(perm => { return checkPermission(perm); }))
+            .then(checkIndexedDB)
+            .then(checkServiceWorkers)
+            .then(checkCaches)
+            .then(checkNavigation)
+            .then(registerServiceWorker)
+            .then(openCaches)
+            .then(getChildFrameResult)
+            .then(checkUpdatedResult)
+            .then(checkUpdatedIndexedDB)
+            .then(checkUpdatedServiceWorkers)
+            .then(checkUpdatedCaches);
+    });
+});
+</script>
diff --git a/testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationReceiver_create_receiving-ua_child.html b/testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationReceiver_create_receiving-ua_child.html
new file mode 100644
index 0000000000..2f67f7fac0
--- /dev/null
+++ b/testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationReceiver_create_receiving-ua_child.html
@@ -0,0 +1,171 @@
+<!DOCTYPE html>
+
+<meta charset="utf-8">
+<title>Creating a receiving browsing context</title>
+<link rel="author" title="Tomoyuki Shimizu" href="https://github.com/tomoyukilabs/">
+<link rel="help" href="https://w3c.github.io/presentation-api/#creating-a-receiving-browsing-context">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<p id="notice">Checking <code id="modal"></code>: if you see this message, please wait for test to time out.</p>
+
+<script>
+add_completion_callback((tests, status) => {
+    // remove unserializable attributes, then send the result to the parent window
+    // note: a single test result is supposed to appear here.
+    window.parent.postMessage(JSON.parse(JSON.stringify({
+        type: 'presentation-api', test: tests[0], status: status
+    })), location.origin);
+});
+
+window.addEventListener('message', event => {
+    if(event.data !== 'start')
+        return;
+
+    promise_test(t => {
+        const notice = document.getElementById('notice');
+        const modal = document.getElementById('modal');
+
+        // Presentation and PresentationReceiver
+        assert_true(navigator.presentation instanceof Presentation, 'navigator.presentation in a nested browsing context is an instanceof Presentation.');
+        assert_equals(navigator.presentation.receiver, null, 'navigator.presentation.receiver in a nested browsing context is set to null.');
+
+        // Session history
+        assert_equals(window.history.length, 1, 'Session history consists of the current page only.');
+
+        // The Sandboxed auxiliary navigation browsing context flag (codes below are expected to be ignored)
+        assert_equals(window.open('./idlharness_receiving-ua.html'), null, 'Sandboxed auxiliary navigation browsing context flag is set.');
+
+        // The sandboxed modals flag (codes below are expected to be ignored):
+        // If user agent prompts user, a timeout will occur and the test will eventually fail
+        let message = 'If you see this prompt, do not dismiss it and wait for test to time out.';
+        notice.style.display = 'block';
+        modal.textContent = 'alert()';
+        alert(message);
+        modal.textContent = 'confirm()';
+        confirm(message);
+        modal.textContent = 'print()';
+        print();
+        modal.textContent = 'prompt()';
+        prompt(message);
+        notice.style.display = 'none';
+
+        // Permissions
+        const checkPermission = query => {
+            return navigator.permissions ? navigator.permissions.query(query).then(status => {
+                assert_equals(status.state, 'denied', 'The state of the "' + query.name + '" permission in a nested browsing context is set to "denied".');
+            }, () => { /* skip this assertion if the specified permission is not implemented */ }) : Promise.resolve();
+        };
+
+        // Cookie
+        assert_equals(document.cookie, 'PresentationApiTest=Receiving-UA', 'A cookie store is shared by top-level and nested browsing contexts.');
+
+        // Indexed Database
+        const dbName = 'db-presentation-api-receiving-ua';
+        const checkIndexedDB = () => {
+            if ('indexedDB' in window) {
+                message = 'Indexed Database is shared by top-level and nested browsing contexts.';
+
+                const req = indexedDB.open(dbName);
+                const upgradeneededWatcher = new EventWatcher(t, req, 'upgradeneeded');
+                const successWatcher = new EventWatcher(t, req, 'success');
+                return Promise.race([
+                    upgradeneededWatcher.wait_for('upgradeneeded').then(evt => {
+                        evt.target.result.close();
+                        // This would fail if the database is not created by the top-level browsing context
+                        assert_unreached(message);
+                    }),
+                    successWatcher.wait_for('success').then(evt => {
+                        evt.target.result.close();
+                        const db = evt.target.result;
+                        const version = db.version;
+                        db.close();
+                        // Check if the version of the database is 2 as specified by the top-level browsing context
+                        assert_equals(version, 2, message);
+
+                        // Upgrade the version
+                        const req = indexedDB.open(dbName, 3);
+                        const eventWatcher = new EventWatcher(t, req, 'upgradeneeded');
+                        return eventWatcher.wait_for('upgradeneeded');
+                    }).then(evt => {
+                        evt.target.result.close();
+                    })
+                ]);
+            }
+            else
+                return Promise.resolve();
+        };
+
+        // Web Storage
+        assert_equals(sessionStorage.length, 1, 'Session storage is shared by top-level and nested browsing contexts.');
+        assert_equals(sessionStorage.getItem('presentation_api_test'), 'receiving-ua', 'Session storage is shared by top-level and nested browsing contexts.');
+        assert_equals(localStorage.length, 1, 'Local storage is shared by top-level and nested browsing contexts.');
+        assert_equals(localStorage.getItem('presentation_api_test'), 'receiving-ua', 'Local storage is shared by top-level and nested browsing contexts.');
+
+        // Service Workers
+        const checkServiceWorkers = () => {
+            return 'serviceWorker' in navigator ? navigator.serviceWorker.getRegistrations().then(registrations => {
+                message = 'List of registered service worker registrations is shared by top-level and nested browsing contexts.';
+                assert_equals(registrations.length, 1, message);
+                assert_equals(registrations[0].active.scriptURL, new Request('../serviceworker.js').url, message);
+            }) : Promise.resolve();
+        };
+        const checkCaches = () => {
+            message = 'Cache storage is shared by top-level and nested browsing contexts.';
+            return 'caches' in window ? caches.keys().then(keys => {
+                assert_equals(keys.length, 1, message);
+                assert_equals(keys[0], 'receiving-ua', message);
+                return caches.open(keys[0]);
+            }).then(cache => cache.matchAll())
+            .then(responses => {
+                assert_equals(responses.length, 1, message);
+                assert_equals(responses[0].url, new Request('../cache.txt').url, message);
+            }) : Promise.resolve();
+        };
+
+        // Update storages and service workers shared with the top-level brosing context
+        document.cookie = 'NestedBrowsingContext=True';
+        sessionStorage.setItem('nested_browsing_context', 'yes');
+        localStorage.setItem('nested_browsing_context', 'yes');
+
+        // register a service worker with different scope from that of the top-level browsing context
+        const registerServiceWorker = () => {
+            return 'serviceWorker' in navigator ?
+                navigator.serviceWorker.register('serviceworker.js').then(registration => {
+                    return new Promise((resolve, reject) => {
+                        if (registration.installing) {
+                            registration.installing.addEventListener('statechange', event => {
+                                if(event.target.state === 'installed')
+                                    resolve();
+                            });
+                        }
+                        else
+                            resolve();
+                    });
+                }) : Promise.resolve();
+        };
+
+        const openCaches = () => {
+            return 'caches' in window
+                ? caches.open('nested-browsing-context').then(cache => cache.add('../cache.txt')) : Promise.resolve();
+        };
+
+        // Asynchronous tests
+        const permissionList = [
+            { name: 'geolocation' },
+            { name: 'notifications' },
+            { name: 'push', userVisibleOnly: true },
+            { name: 'midi' },
+            { name: 'camera' },
+            { name: 'microphone' },
+            { name: 'speaker' },
+            { name: 'background-sync' }
+        ];
+        return Promise.all(permissionList.map(perm => { return checkPermission(perm); }))
+            .then(checkIndexedDB)
+            .then(checkServiceWorkers)
+            .then(checkCaches)
+            .then(registerServiceWorker)
+            .then(openCaches);
+    });
+});
+</script>
diff --git a/testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationReceiver_unreached_receiving-ua.html b/testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationReceiver_unreached_receiving-ua.html
new file mode 100644
index 0000000000..2b2a8b315e
--- /dev/null
+++ b/testing/web-platform/tests/presentation-api/receiving-ua/support/PresentationReceiver_unreached_receiving-ua.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+
+<meta charset="utf-8">
+<title>Creating a receiving browsing context</title>
+<link rel="author" title="Tomoyuki Shimizu" href="https://github.com/tomoyukilabs/">
+<link rel="help" href="https://w3c.github.io/presentation-api/#creating-a-receiving-browsing-context">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="../common.js"></script>
+<script src="stash.js"></script>
+<script>
+add_completion_callback((tests, status) => {
+    const stash = new Stash(stashIds.toReceiver, stashIds.toController);
+    const log = document.getElementById('log');
+    stash.send(JSON.stringify({ test: tests[0], status: status, log: log.innerHTML }));
+});
+
+test(() => {
+    assert_unreached('Top-level navigation is disabled.');
+});
+</script>
diff --git a/testing/web-platform/tests/presentation-api/receiving-ua/support/idlharness_receiving-ua.html b/testing/web-platform/tests/presentation-api/receiving-ua/support/idlharness_receiving-ua.html
new file mode 100644
index 0000000000..2d5a5b17f1
--- /dev/null
+++ b/testing/web-platform/tests/presentation-api/receiving-ua/support/idlharness_receiving-ua.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Presentation API IDL tests for Receiving User Agent</title>
+<link rel="author" title="Louay Bassbouss" href="http://www.fokus.fraunhofer.de">
+<link rel="author" title="Tomoyuki Shimizu" href="https://github.com/tomoyukilabs">
+<link rel="help" href="http://w3c.github.io/presentation-api/#dfn-receiving-user-agent">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/WebIDLParser.js"></script>
+<script src="/resources/idlharness.js"></script>
+<script src="../common.js"></script>
+<script src="stash.js"></script>
+
+<script>
+    'use strict';
+    (async () => {
+        const srcs = ['presentation-api', 'dom', 'html'];
+        const [idl, dom, html] = await Promise.all(
+            srcs.map(i => fetch(`/interfaces/${i}.idl`).then(r => r.text())));
+
+        const idl_array = new IdlArray();
+        idl_array.add_idls(idl, {
+            except: [
+                'PresentationRequest',
+                'PresentationAvailability',
+            ]
+        });
+        idl_array.add_dependency_idls(dom);
+        idl_array.add_dependency_idls(html);
+        idl_array.add_objects({
+            Presentation: ['navigator.presentation'],
+            PresentationReceiver: ['navigator.presentation.receiver']
+        });
+        add_completion_callback((tests, status) => {
+            const stash = new Stash(stashIds.toReceiver, stashIds.toController);
+            const log = document.getElementById('log');
+            stash.send(JSON.stringify({ tests: tests, status: status, log: log.innerHTML }));
+        });
+        idl_array.test();
+    })();
+</script>
diff --git a/testing/web-platform/tests/presentation-api/receiving-ua/support/iframe.html b/testing/web-platform/tests/presentation-api/receiving-ua/support/iframe.html
new file mode 100644
index 0000000000..61f18b8912
--- /dev/null
+++ b/testing/web-platform/tests/presentation-api/receiving-ua/support/iframe.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Helper functions invoked by a nested browsing context</title>
+<link rel="author" title="Tomoyuki Shimizu" href="https://github.com/tomoyukilabs">
+<link rel="help" href="https://w3c.github.io/presentation-api/#monitoring-incoming-presentation-connections">
+
+<script>
+  window.addEventListener('message', event => {
+    const data = event.data;
+
+    if (!data.type)
+      return;
+    else if (data.type === 'connect') {
+      const request = new PresentationRequest(data.url);
+      request.reconnect(data.id).then(c => {
+        c.onterminate = () => {
+          window.parent.postMessage({ type: 'terminated' }, '*');
+        };
+      });
+    }
+  });
+</script>
\ No newline at end of file
diff --git a/testing/web-platform/tests/presentation-api/receiving-ua/support/serviceworker.js b/testing/web-platform/tests/presentation-api/receiving-ua/support/serviceworker.js
new file mode 100644
index 0000000000..d2d4449ded
--- /dev/null
+++ b/testing/web-platform/tests/presentation-api/receiving-ua/support/serviceworker.js
@@ -0,0 +1,9 @@
+self.addEventListener('install', () => {
+    // activate this service worker immediately
+    self.skipWaiting();
+});
+
+self.addEventListener('activate', event => {
+    // let this service worker control window clients immediately
+    event.waitUntil(self.clients.claim());
+});
diff --git a/testing/web-platform/tests/presentation-api/receiving-ua/support/stash.js b/testing/web-platform/tests/presentation-api/receiving-ua/support/stash.js
new file mode 100644
index 0000000000..eb63bb8623
--- /dev/null
+++ b/testing/web-platform/tests/presentation-api/receiving-ua/support/stash.js
@@ -0,0 +1,98 @@
+var Stash = function(inbound, outbound) {
+  this.stashPath = '/presentation-api/receiving-ua/support/stash.py?id=';
+  this.inbound = inbound;
+  this.outbound = outbound;
+}
+
+// initialize a stash on wptserve
+Stash.prototype.init = function() {
+  return Promise.all([
+    fetch(this.stashPath + this.inbound).then(response => {
+      return response.text();
+    }),
+    fetch(this.stashPath + this.outbound).then(response => {
+      return response.text();
+    })
+  ]);
+}
+
+// upload a test result to a stash on wptserve
+Stash.prototype.send = function(result) {
+  return fetch(this.stashPath + this.outbound, {
+    method: 'POST',
+    body: JSON.stringify({ type: 'data', data: result })
+  }).then(response => {
+    return response.text();
+  }).then(text => {
+    return text === 'ok' ? null : Promise.reject();
+  })
+};
+
+// upload a test result to a stash on wptserve via navigator.sendBeacon
+Stash.prototype.sendBeacon = function(result) {
+  if ('sendBeacon' in navigator) {
+    navigator.sendBeacon(this.stashPath + this.outbound, JSON.stringify({ type: 'data', data: result }));
+  }
+  // Note: The following could be discarded, since XHR in synchronous mode is now being deprecated.
+  else {
+    return new Promise(resolve, reject => {
+      const xhr = new XMLHttpRequest();
+      xhr.open('POST', this.stashPath + this.outbound, false);
+      xhr.send(JSON.stringify({ type: 'data', data: result }));
+    });
+  }
+};
+
+// wait until a test result is uploaded to a stash on wptserve
+Stash.prototype.receive = function() {
+  return new Promise((resolve, reject) => {
+    let intervalId;
+    const interval = 500; // msec
+    const polling = () => {
+      return fetch(this.stashPath + this.inbound).then(response => {
+        return response.text();
+      }).then(text => {
+        if (text) {
+          try {
+            const json = JSON.parse(text);
+            if (json.type === 'data')
+              resolve(json.data);
+            else
+              reject();
+          } catch(e) {
+            resolve(text);
+          }
+          clearInterval(intervalId);
+        }
+      });
+    };
+    intervalId = setInterval(polling, interval);
+  });
+};
+
+// reset a stash on wptserve
+Stash.prototype.stop = function() {
+  return Promise.all([
+    fetch(this.stashPath + this.inbound).then(response => {
+      return response.text();
+    }),
+    fetch(this.stashPath + this.outbound).then(response => {
+      return response.text();
+    })
+  ]).then(() => {
+    return Promise.all([
+      fetch(this.stashPath + this.inbound, {
+        method: 'POST',
+        body: JSON.stringify({ type: 'stop' })
+      }).then(response => {
+        return response.text();
+      }),
+      fetch(this.stashPath + this.outbound, {
+        method: 'POST',
+        body: JSON.stringify({ type: 'stop' })
+      }).then(response => {
+        return response.text();
+      })
+    ]);
+  });
+}
diff --git a/testing/web-platform/tests/presentation-api/receiving-ua/support/stash.py b/testing/web-platform/tests/presentation-api/receiving-ua/support/stash.py
new file mode 100644
index 0000000000..83653d365a
--- /dev/null
+++ b/testing/web-platform/tests/presentation-api/receiving-ua/support/stash.py
@@ -0,0 +1,10 @@
+def main(request, response):
+    key = request.GET.first(b"id")
+
+    if request.method == u"POST":
+        request.server.stash.put(key, request.body)
+        return b"ok"
+    else:
+        value = request.server.stash.take(key)
+        assert request.server.stash.take(key) is None
+        return value
\ No newline at end of file
-- 
cgit v1.2.3

