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>
---
 ...without-user-activation-disabled-tentative.html |  51 +++++
 ...hout-user-activation-enabled-tentative.sub.html |  51 +++++
 .../experimental-features/resources/common.js      |  94 ++++++++
 .../feature-policy-trust-token-redemption.html     |  55 +++++
 ...s-without-user-activation-iframe-tentative.html |  47 ++++
 .../resources/lazyload-contents.html               |  13 ++
 .../experimental-features/resources/lazyload.png   | Bin 0 -> 20819 bytes
 .../vertical-scroll-scrollable-content.html        |  16 ++
 .../resources/vertical-scroll-scrollbar-ref.html   |  13 ++
 .../resources/vertical-scroll-scrollintoview.html  |  45 ++++
 .../resources/vertical-scroll-touch-action.html    |  14 ++
 .../resources/vertical-scroll-touch-block.html     |  42 ++++
 .../resources/vertical-scroll-wheel-block.html     |  22 ++
 .../resources/vertical-scroll.js                   |  25 +++
 ...default-feature-policy.tentative.https.sub.html |  62 ++++++
 ...tion-supported-by-feature-policy.tentative.html |   9 +
 ...-disabled-frame-no-scroll-manual.tentative.html | 113 ++++++++++
 ...rtical-scroll-disabled-scrollbar-tentative.html |   4 +
 ...ertical-scroll-main-frame-manual.tentative.html |  46 ++++
 ...scroll-main-frame-manual.tentative.html.headers |   1 +
 .../vertical-scroll-scrollintoview.tentative.html  | 117 ++++++++++
 ...tical-scroll-touch-action-manual.tentative.html | 103 +++++++++
 ...rtical-scroll-touch-block-manual.tentative.html | 237 +++++++++++++++++++++
 ...rtical-scroll-wheel-block-manual.tentative.html | 145 +++++++++++++
 24 files changed, 1325 insertions(+)
 create mode 100644 testing/web-platform/tests/feature-policy/experimental-features/focus-without-user-activation-disabled-tentative.html
 create mode 100644 testing/web-platform/tests/feature-policy/experimental-features/focus-without-user-activation-enabled-tentative.sub.html
 create mode 100644 testing/web-platform/tests/feature-policy/experimental-features/resources/common.js
 create mode 100644 testing/web-platform/tests/feature-policy/experimental-features/resources/feature-policy-trust-token-redemption.html
 create mode 100644 testing/web-platform/tests/feature-policy/experimental-features/resources/focus-without-user-activation-iframe-tentative.html
 create mode 100644 testing/web-platform/tests/feature-policy/experimental-features/resources/lazyload-contents.html
 create mode 100644 testing/web-platform/tests/feature-policy/experimental-features/resources/lazyload.png
 create mode 100644 testing/web-platform/tests/feature-policy/experimental-features/resources/vertical-scroll-scrollable-content.html
 create mode 100644 testing/web-platform/tests/feature-policy/experimental-features/resources/vertical-scroll-scrollbar-ref.html
 create mode 100644 testing/web-platform/tests/feature-policy/experimental-features/resources/vertical-scroll-scrollintoview.html
 create mode 100644 testing/web-platform/tests/feature-policy/experimental-features/resources/vertical-scroll-touch-action.html
 create mode 100644 testing/web-platform/tests/feature-policy/experimental-features/resources/vertical-scroll-touch-block.html
 create mode 100644 testing/web-platform/tests/feature-policy/experimental-features/resources/vertical-scroll-wheel-block.html
 create mode 100644 testing/web-platform/tests/feature-policy/experimental-features/resources/vertical-scroll.js
 create mode 100644 testing/web-platform/tests/feature-policy/experimental-features/trust-token-redemption-default-feature-policy.tentative.https.sub.html
 create mode 100644 testing/web-platform/tests/feature-policy/experimental-features/trust-token-redemption-supported-by-feature-policy.tentative.html
 create mode 100644 testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-disabled-frame-no-scroll-manual.tentative.html
 create mode 100644 testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-disabled-scrollbar-tentative.html
 create mode 100644 testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-main-frame-manual.tentative.html
 create mode 100644 testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-main-frame-manual.tentative.html.headers
 create mode 100644 testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-scrollintoview.tentative.html
 create mode 100644 testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-touch-action-manual.tentative.html
 create mode 100644 testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-touch-block-manual.tentative.html
 create mode 100644 testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-wheel-block-manual.tentative.html

(limited to 'testing/web-platform/tests/feature-policy/experimental-features')

diff --git a/testing/web-platform/tests/feature-policy/experimental-features/focus-without-user-activation-disabled-tentative.html b/testing/web-platform/tests/feature-policy/experimental-features/focus-without-user-activation-disabled-tentative.html
new file mode 100644
index 0000000000..c4413f7804
--- /dev/null
+++ b/testing/web-platform/tests/feature-policy/experimental-features/focus-without-user-activation-disabled-tentative.html
@@ -0,0 +1,51 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="./resources/common.js"></script>
+<title> 'focus-without-user-activation' Policy : Correctly block automatic focus when policy disabled
+</title>
+<body>
+<script>
+  "use strict"
+  // Note: According to html spec: https://html.spec.whatwg.org/#attr-fe-autofocus,
+  // topDocument's autofocus processed flag initially is false and is set to true
+  // after flushing autofocus candidates, i.e. flush of autofocus candidates
+  // only happens once per page load.
+  // In order to test the behaviour with both focus-without-user-activation on and off:
+  // two test files are necessary:
+  // - focus-without-user-activation-disabled-tentative.html
+  // - focus-without-user-activation-enabled-tentative.sub.html
+
+  // Use same origin url here because when iframe document has cross origin
+  // url, autofocus will be blocked by default with following console error:
+  // "Blocked autofocusing on a form control in a cross-origin subframe."
+  const url = "/feature-policy/experimental-features/resources/focus-without-user-activation-iframe-tentative.html";
+
+  function subframe_focused(subframe, event_name, timeout) {
+    return new Promise(resolve => {
+      window.onmessage = m => resolve(m.data.focused);
+      subframe.contentWindow.postMessage({
+        event: event_name,
+        timeout: timeout
+      }, "*");
+    });
+  }
+
+  promise_test( async (instance) => {
+    const frame = createIframe(document.body, {
+      sandbox: "allow-scripts allow-same-origin",
+      allow: "focus-without-user-activation 'none'",
+      src: url
+    });
+
+    await wait_for_load(frame);
+    assert_false(await subframe_focused(frame, "autofocus", 400), "'autofocus' should not work.");
+    window.focus(); // Reset focus state in subframe.
+    assert_false(await subframe_focused(frame, "focus-input", 400), "'element.focus' should not work.");
+    window.focus(); // Reset focus state in subframe.
+    assert_false(await subframe_focused(frame, "focus-window", 400), "'window.focus' should not work.");
+    window.focus(); // Reset focus state in subframe.
+  }, "When the policy is disabled, 'autofocus' and scripted focus do not focus " +
+     "the document.");
+</script>
+</body>
diff --git a/testing/web-platform/tests/feature-policy/experimental-features/focus-without-user-activation-enabled-tentative.sub.html b/testing/web-platform/tests/feature-policy/experimental-features/focus-without-user-activation-enabled-tentative.sub.html
new file mode 100644
index 0000000000..411e4f2fa0
--- /dev/null
+++ b/testing/web-platform/tests/feature-policy/experimental-features/focus-without-user-activation-enabled-tentative.sub.html
@@ -0,0 +1,51 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="./resources/common.js"></script>
+<title> 'focus-without-user-activation' Policy : Correctly block automatic focus when policy disabled
+</title>
+<body>
+<script>
+  "use strict"
+  // Note: According to html spec: https://html.spec.whatwg.org/#attr-fe-autofocus,
+  // topDocument's autofocus processed flag initially is false and is set to true
+  // after flushing autofocus candidates, i.e. flush of autofocus candidates
+  // only happens once per page load.
+  // In order to test the behaviour with both focus-without-user-activation on and off:
+  // two test files are necessary:
+  // - focus-without-user-activation-disabled-tentative.html
+  // - focus-without-user-activation-enabled-tentative.sub.html
+
+  // Cross origin subframe should not be able to use autofocus to steal focus
+  // from main frame by default. However, with focus-without-user-activation
+  // enabled for subframe, subframe should be able to autofocus.
+  const url = "http://{{hosts[alt][www1]}}:{{ports[http][0]}}/feature-policy/experimental-features/resources/focus-without-user-activation-iframe-tentative.html";
+
+  function subframe_focused(subframe, event_name, timeout) {
+    return new Promise(resolve => {
+      window.onmessage = m => resolve(m.data.focused);
+      subframe.contentWindow.postMessage({
+        event: event_name,
+        timeout: timeout
+      }, "*");
+    });
+  }
+
+  promise_test( async (instance) => {
+    const frame = createIframe(document.body, {
+      sandbox: "allow-scripts allow-same-origin",
+      allow: "focus-without-user-activation *",
+      src: url
+    });
+
+    await wait_for_load(frame);
+    assert_true(await subframe_focused(frame, "autofocus"), "'autofocus' should work.");
+    window.focus(); // Reset focus state in subframe.
+    assert_true(await subframe_focused(frame, "focus-input"), "'element.focus' should work.");
+    window.focus(); // Reset focus state in subframe.
+    assert_true(await subframe_focused(frame, "focus-window"), "'window.focus' should work.");
+    window.focus(); // Reset focus state in subframe.
+  }, "When the policy is enabled, 'autofocus' and scripted focus do focus " +
+     "the document.");
+</script>
+</body>
diff --git a/testing/web-platform/tests/feature-policy/experimental-features/resources/common.js b/testing/web-platform/tests/feature-policy/experimental-features/resources/common.js
new file mode 100644
index 0000000000..4266e39495
--- /dev/null
+++ b/testing/web-platform/tests/feature-policy/experimental-features/resources/common.js
@@ -0,0 +1,94 @@
+const url_base = "/feature-policy/experimental-features/resources/";
+window.messageResponseCallback = null;
+
+function setFeatureState(iframe, feature, origins) {
+    iframe.setAttribute("allow", `${feature} ${origins};`);
+}
+
+// Returns a promise which is resolved when the <iframe> is navigated to |url|
+// and "load" handler has been called.
+function loadUrlInIframe(iframe, url) {
+  return new Promise((resolve) => {
+    iframe.addEventListener("load", resolve);
+    iframe.src = url;
+  });
+}
+
+// Posts |message| to |target| and resolves the promise with the response coming
+// back from |target|.
+function sendMessageAndGetResponse(target, message) {
+  return new Promise((resolve) => {
+    window.messageResponseCallback = resolve;
+    target.postMessage(message, "*");
+  });
+}
+
+
+function onMessage(e) {
+  if (window.messageResponseCallback) {
+    window.messageResponseCallback(e.data);
+    window.messageResponseCallback = null;
+  }
+}
+
+window.addEventListener("message", onMessage);
+
+// Waits for |load_timeout| before resolving the promise. It will resolve the
+// promise sooner if a message event with |e.data.id| of |id| is received.
+// In such a case the response is the contents of the message |e.data.contents|.
+// Otherwise, returns false (when timeout occurs).
+function waitForMessageOrTimeout(t, id, load_timeout) {
+  return new Promise((resolve) => {
+      window.addEventListener(
+        "message",
+        (e) => {
+          if (!e.data || e.data.id !== id)
+            return;
+          resolve(e.data.contents);
+        }
+      );
+      t.step_timeout(() => { resolve(false); }, load_timeout);
+  });
+}
+
+function createIframe(container, attributes) {
+  var new_iframe = document.createElement("iframe");
+  for (attr_name in attributes)
+    new_iframe.setAttribute(attr_name, attributes[attr_name]);
+  container.appendChild(new_iframe);
+  return new_iframe;
+}
+
+// Returns a promise which is resolved when |load| event is dispatched for |e|.
+function wait_for_load(e) {
+  return new Promise((resolve) => {
+    e.addEventListener("load", resolve);
+  });
+}
+
+setup(() => {
+  window.reporting_observer_instance = new ReportingObserver((reports, observer) => {
+    if (window.reporting_observer_callback) {
+      reports.forEach(window.reporting_observer_callback);
+    }
+  }, {types: ["permissions-policy-violation"]});
+  window.reporting_observer_instance.observe();
+  window.reporting_observer_callback = null;
+});
+
+// Waits for a violation in |feature| and source file containing |file_name|.
+function wait_for_violation_in_file(feature, file_name) {
+  return new Promise( (resolve) => {
+    assert_equals(null, window.reporting_observer_callback);
+    window.reporting_observer_callback = (report) => {
+        var feature_match = (feature === report.body.featureId);
+        var file_name_match =
+            !file_name ||
+            (report.body.sourceFile.indexOf(file_name) !== -1);
+        if (feature_match && file_name_match) {
+          window.reporting_observer_callback = null;
+          resolve(report);
+        }
+    };
+  });
+}
diff --git a/testing/web-platform/tests/feature-policy/experimental-features/resources/feature-policy-trust-token-redemption.html b/testing/web-platform/tests/feature-policy/experimental-features/resources/feature-policy-trust-token-redemption.html
new file mode 100644
index 0000000000..fa5f38b62f
--- /dev/null
+++ b/testing/web-platform/tests/feature-policy/experimental-features/resources/feature-policy-trust-token-redemption.html
@@ -0,0 +1,55 @@
+<script>
+  'use strict';
+
+  window.onload = function() {
+    // When the trust-token-redemption feature policy is enabled, redemption
+    // and signing ("send-redemption-record") should both be available; when it's disabled,
+    // they should both be unavailable. Send the number of available operations
+    // upstream in order to enforce this in assertions.
+    let num_enabled = 4;
+    try {
+      new Request("https://issuer.example/", {
+        trustToken: {
+          type: "token-redemption"
+        }
+      });
+    } catch (e) {
+      num_enabled--;
+    }
+    try {
+      new Request("https://destination.example/", {
+        trustToken: {
+          type: "send-redemption-record",
+          issuers: ["https://issuer.example/"]
+        }
+      });
+    } catch (e) {
+      num_enabled--;
+    }
+
+    try {
+      const xhr = new XMLHttpRequest();
+      xhr.open("GET", "https://issuer.example/");
+      xhr.setTrustToken({
+        type: "token-redemption"
+      });
+    } catch (e) {
+      num_enabled--;
+    }
+
+    try {
+      const xhr = new XMLHttpRequest();
+      xhr.open("GET", "https://destination.example/");
+      xhr.setTrustToken({
+        type: "send-redemption-record",
+        issuers: ["https://issuer.example/"]
+      });
+    } catch (e) {
+      num_enabled--;
+    }
+
+    parent.postMessage({
+      num_operations_enabled: num_enabled
+    }, '*');
+  }
+</script>
diff --git a/testing/web-platform/tests/feature-policy/experimental-features/resources/focus-without-user-activation-iframe-tentative.html b/testing/web-platform/tests/feature-policy/experimental-features/resources/focus-without-user-activation-iframe-tentative.html
new file mode 100644
index 0000000000..3d5aab95ad
--- /dev/null
+++ b/testing/web-platform/tests/feature-policy/experimental-features/resources/focus-without-user-activation-iframe-tentative.html
@@ -0,0 +1,47 @@
+<!doctype html>
+<input autofocus onfocus="autofocus_onfocus()"/>
+<script>
+  let autofocused = false;
+  function autofocus_onfocus() {
+    autofocused = true;
+  }
+
+  /**
+   * @param target object: Target to call |focus()| with.
+   * @param timeout integer | undefined: Timeout to wait for the focus event.
+   * If unspecified, a timeout will not be set.
+   * @param focus_target boolean | undefined: Wether to focus the target after
+   * listening for |onfocus| event.
+   */
+  function wait_focus_event(target, timeout, focus_target) {
+    return new Promise((resolve) => {
+      if (timeout)
+        setTimeout(() => resolve(false), timeout);
+
+      target.onfocus = () => resolve(true);
+      if (focus_target)
+        target.focus();
+    });
+  }
+
+  function post_result(destination, result) {
+    destination.postMessage({focused: result}, "*");
+  }
+
+  window.addEventListener("message", (e) => {
+    if (e.data.event === "autofocus") {
+      if (autofocused)
+        post_result(e.source, true);
+
+      wait_focus_event(document.querySelector("input"), e.data.timeout)
+        .then(result => post_result(e.source, result));
+    } else if (e.data.event === "focus-window") {
+      wait_focus_event(window, e.data.timeout, true /* focus_target */)
+        .then(result => post_result(e.source, result));
+    } else if (e.data.event === "focus-input") {
+      const input_element = document.querySelector("input");
+      wait_focus_event(input_element, e.data.timeout, true /* focus_target */)
+        .then(result => post_result(e.source, result));
+    }
+});
+</script>
diff --git a/testing/web-platform/tests/feature-policy/experimental-features/resources/lazyload-contents.html b/testing/web-platform/tests/feature-policy/experimental-features/resources/lazyload-contents.html
new file mode 100644
index 0000000000..a6e98c24e6
--- /dev/null
+++ b/testing/web-platform/tests/feature-policy/experimental-features/resources/lazyload-contents.html
@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<body>
+  <p>This page is lazyloaded.</p>
+  <script>
+    let query_index = window.location.href.indexOf("?id=");
+    let id = window.location.href.substr(query_index + 4);
+    window.addEventListener("load", () => {
+      let p = document.querySelector("p");
+      let contents = p ? p.innerHTML : "null";
+      window.parent.postMessage({"id": id, "contents": contents}, "*");
+    });
+  </script>
+</body>
diff --git a/testing/web-platform/tests/feature-policy/experimental-features/resources/lazyload.png b/testing/web-platform/tests/feature-policy/experimental-features/resources/lazyload.png
new file mode 100644
index 0000000000..fd3da53a29
Binary files /dev/null and b/testing/web-platform/tests/feature-policy/experimental-features/resources/lazyload.png differ
diff --git a/testing/web-platform/tests/feature-policy/experimental-features/resources/vertical-scroll-scrollable-content.html b/testing/web-platform/tests/feature-policy/experimental-features/resources/vertical-scroll-scrollable-content.html
new file mode 100644
index 0000000000..9f78ea4bc2
--- /dev/null
+++ b/testing/web-platform/tests/feature-policy/experimental-features/resources/vertical-scroll-scrollable-content.html
@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<style>
+  body, html {
+    height: 100%;
+    width: 100%;
+  }
+  #spacer {
+    width: 1500px;
+    height: 1500px;
+    background-color: red;
+  }
+</style>
+<body>
+  <p>This page is scrollable.</p>
+  <div id="spacer"></div>
+</body>
diff --git a/testing/web-platform/tests/feature-policy/experimental-features/resources/vertical-scroll-scrollbar-ref.html b/testing/web-platform/tests/feature-policy/experimental-features/resources/vertical-scroll-scrollbar-ref.html
new file mode 100644
index 0000000000..66d0a55104
--- /dev/null
+++ b/testing/web-platform/tests/feature-policy/experimental-features/resources/vertical-scroll-scrollbar-ref.html
@@ -0,0 +1,13 @@
+<!doctype html>
+<title>Ref: vertical-scroll test for scrollbar</title>
+<iframe src="/feature-policy/experimental-features/resources/vertical-scroll-scrollable-content.html"></iframe>
+<script>
+  let iframe = document.querySelector("iframe");
+  let overflow_y = "visible";
+  if (window.location.search.indexOf("no-vertical-scrollbar") !== -1)
+    overflow_y = "hidden"
+  iframe.addEventListener("load", () => {
+    iframe.contentDocument.body.style.overflowY = overflow_y;
+  });
+</script>
+
diff --git a/testing/web-platform/tests/feature-policy/experimental-features/resources/vertical-scroll-scrollintoview.html b/testing/web-platform/tests/feature-policy/experimental-features/resources/vertical-scroll-scrollintoview.html
new file mode 100644
index 0000000000..7bed27c260
--- /dev/null
+++ b/testing/web-platform/tests/feature-policy/experimental-features/resources/vertical-scroll-scrollintoview.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<style>
+html, body, #container {
+  width: 100%;
+  height: 100%;
+}
+
+#spacer {
+  width: 200%;
+  height: 200%;
+}
+</style>
+<div id="container">
+  <div id="spacer"></div>
+  <button>Element To Scroll</button>
+</div>
+<script>
+  window.addEventListener('message', onMessageReceived);
+
+  function scrollingElementBounds() {
+    var rect = document.querySelector("button").getBoundingClientRect();
+    return {
+        x: rect.x, y: rect.y, width: rect.width, height: rect.height
+      };
+  }
+
+  function onMessageReceived(e) {
+    if (!e.data || !e.data.type)
+      return;
+    switch(e.data.type) {
+      case "scroll":
+        document.querySelector("button").scrollIntoView({behavior: "instant"});
+        ackMessage({bounds: scrollingElementBounds()}, e.source);
+      break;
+
+      case "scrolling-element-bounds":
+        ackMessage({bounds: scrollingElementBounds()}, e.source);
+      break;
+    }
+  }
+
+  function ackMessage(msg, source) {
+    source.postMessage(msg, "*");
+  }
+</script>
diff --git a/testing/web-platform/tests/feature-policy/experimental-features/resources/vertical-scroll-touch-action.html b/testing/web-platform/tests/feature-policy/experimental-features/resources/vertical-scroll-touch-action.html
new file mode 100644
index 0000000000..51b715f30a
--- /dev/null
+++ b/testing/web-platform/tests/feature-policy/experimental-features/resources/vertical-scroll-touch-action.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<style>
+  body, html {
+    height: 100%;
+    width: 100%;
+    overflow: hidden;
+  }
+  body {
+    touch-action: none;
+  }
+</style>
+<body>
+  <p>This page blocks all 'touch-action'.</p>
+</body>
diff --git a/testing/web-platform/tests/feature-policy/experimental-features/resources/vertical-scroll-touch-block.html b/testing/web-platform/tests/feature-policy/experimental-features/resources/vertical-scroll-touch-block.html
new file mode 100644
index 0000000000..4c204055af
--- /dev/null
+++ b/testing/web-platform/tests/feature-policy/experimental-features/resources/vertical-scroll-touch-block.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<style>
+body, div, html {
+  height: 100%;
+  width: 100%;
+  overflow: hidden;
+}
+p {
+  margin-bottom: 1000px;
+  margin-right: 1000px;
+}
+</style>
+<body>
+  <div id="blocker">
+    <p>This page blocks 'touchstart' and 'touchmove'.</p>
+  </div>
+  <script>
+    function doSomethingUnimportant(e) {
+      return false !== e;
+    }
+
+    function preventDefault(e) {
+      e.preventDefault();
+    }
+
+    document.addEventListener("touchstart", doSomethingUnimportant, {passive: false});
+    document.addEventListener("touchmove", doSomethingUnimportant, {passive: false});
+
+    function messageHandler(e) {
+      let msg = e.data;
+      let element = document.querySelector(msg.query);
+      if (msg.prevent) {
+        element.addEventListener(msg.event_type, preventDefault, {passive: false});
+      } else {
+        element.addEventListener(msg.event_type, doSomethingUnimportant);
+      }
+      e.source.postMessage(msg, "*");
+    }
+
+    window.addEventListener("message", messageHandler);
+  </script>
+</body>
diff --git a/testing/web-platform/tests/feature-policy/experimental-features/resources/vertical-scroll-wheel-block.html b/testing/web-platform/tests/feature-policy/experimental-features/resources/vertical-scroll-wheel-block.html
new file mode 100644
index 0000000000..21fc2b9b39
--- /dev/null
+++ b/testing/web-platform/tests/feature-policy/experimental-features/resources/vertical-scroll-wheel-block.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<style>
+  body, html {
+    height: 100%;
+    width: 100%;
+    overflow: hidden;
+  }
+</style>
+<body>
+  <p>This page blocks all 'mouse-wheel'.</p>
+<script>
+  function defaultScroll() {
+    window.scrollTo(0, 0);
+  }
+
+  document.body.addEventListener(
+      "wheel",
+      (e) => { e.preventDefault(); defaultScroll(); }, {passive: false});
+
+  defaultScroll();
+</script>
+</body>
diff --git a/testing/web-platform/tests/feature-policy/experimental-features/resources/vertical-scroll.js b/testing/web-platform/tests/feature-policy/experimental-features/resources/vertical-scroll.js
new file mode 100644
index 0000000000..88835cc602
--- /dev/null
+++ b/testing/web-platform/tests/feature-policy/experimental-features/resources/vertical-scroll.js
@@ -0,0 +1,25 @@
+function rectMaxY(rect) {
+  return rect.height + rect.y;
+}
+
+function rectMaxX(rect) {
+  return rect.width + rect.x;
+}
+
+function isEmptyRect(rect) {
+  return !rect.width || !rect.height;
+}
+
+// Returns true if the given rectangles intersect.
+function rects_intersect(rect1, rect2) {
+  if (isEmptyRect(rect1) || isEmptyRect(rect2))
+    return false;
+  return rect1.x < rectMaxX(rect2) &&
+         rect2.x < rectMaxX(rect1) &&
+         rect1.y < rectMaxY(rect2) &&
+         rect2.y < rectMaxY(rect1);
+}
+
+function rectToString(rect) {
+  return `Location: (${rect.x}, ${rect.y}) Size: (${rect.width}, ${rect.height})`;
+}
diff --git a/testing/web-platform/tests/feature-policy/experimental-features/trust-token-redemption-default-feature-policy.tentative.https.sub.html b/testing/web-platform/tests/feature-policy/experimental-features/trust-token-redemption-default-feature-policy.tentative.https.sub.html
new file mode 100644
index 0000000000..134ccc084d
--- /dev/null
+++ b/testing/web-platform/tests/feature-policy/experimental-features/trust-token-redemption-default-feature-policy.tentative.https.sub.html
@@ -0,0 +1,62 @@
+<!DOCTYPE html>
+<title>Test that trust token redemption is enabled/disabled according to the feature policy</title>
+
+<body>
+  <script src=/resources/testharness.js></script>
+  <script src=/resources/testharnessreport.js></script>
+  <script src=/feature-policy/resources/featurepolicy.js></script>
+  <script>
+    'use strict';
+    const same_origin_src = '/feature-policy/experimental-features/resources/feature-policy-trust-token-redemption.html';
+    const cross_origin_src = 'https://{{domains[www]}}:{{ports[https][0]}}' +
+      same_origin_src;
+    const header = 'Default "trust-token-redemption" feature policy ["self"]';
+
+    test(() => {
+      try {
+        // The feature policy gates redemption and signing via both the Fetch
+        // and XHR interfaces.
+        new Request("https://issuer.example/", {
+          trustToken: {
+            type: "token-redemption"
+          }
+        });
+        new Request("https://destination.example/", {
+          trustToken: {
+            type: "send-redemption-record", // signing
+            issuers: ["https://issuer.example/"]
+          }
+        });
+
+        const redemption_xhr = new XMLHttpRequest();
+        redemption_xhr.open("GET", "https://issuer.example/");
+        redemption_xhr.setTrustToken({
+          type: "token-redemption"
+        });
+
+        const signing_xhr = new XMLHttpRequest();
+        signing_xhr.open("GET", "https://destination.example/");
+        signing_xhr.setTrustToken({
+          type: "send-redemption-record", // signing
+          issuers: ["https://issuer.example/"]
+        });
+      } catch (e) {
+        assert_unreached();
+      }
+    }, header + ' allows the top-level document.');
+
+    async_test(t => {
+      test_feature_availability('Trust token redemption', t, same_origin_src,
+        (data, desc) => {
+          assert_equals(data.num_operations_enabled, 4, desc);
+        });
+    }, header + ' allows same-origin iframes.');
+
+    async_test(t => {
+      test_feature_availability('Trust token redemption', t, cross_origin_src,
+        (data, desc) => {
+          assert_equals(data.num_operations_enabled, 0, desc);
+        });
+    }, header + ' disallows cross-origin iframes.');
+  </script>
+</body>
diff --git a/testing/web-platform/tests/feature-policy/experimental-features/trust-token-redemption-supported-by-feature-policy.tentative.html b/testing/web-platform/tests/feature-policy/experimental-features/trust-token-redemption-supported-by-feature-policy.tentative.html
new file mode 100644
index 0000000000..e349eadc5d
--- /dev/null
+++ b/testing/web-platform/tests/feature-policy/experimental-features/trust-token-redemption-supported-by-feature-policy.tentative.html
@@ -0,0 +1,9 @@
+<!DOCTYPE html>
+<title>Test that trust token redemption is advertised in the feature list</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+  test(() => {
+    assert_in_array('trust-token-redemption', document.featurePolicy.features());
+  }, 'document.featurePolicy.features should advertise trust token redemption.');
+</script>
diff --git a/testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-disabled-frame-no-scroll-manual.tentative.html b/testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-disabled-frame-no-scroll-manual.tentative.html
new file mode 100644
index 0000000000..6f827c919a
--- /dev/null
+++ b/testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-disabled-frame-no-scroll-manual.tentative.html
@@ -0,0 +1,113 @@
+<!doctype html>
+<meta name="timeout" content="long">
+<title>vertical-scroll test for touch-action</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/feature-policy/experimental-features/resources/common.js"></script>
+<script src="/feature-policy/experimental-features/resources/vertical-scroll.js"></script>
+<style>
+html, body {
+  height: 100%;
+  width: 100%;
+}
+
+iframe {
+  width: 90%;
+  height: 90%;
+  margin: 0;
+  padding: 0;
+}
+
+.spacer {
+  width: 100%;
+  height: 100%;
+  margin: 100%;
+}
+</style>
+<iframe></iframe>
+<br/>
+<p>Spacers below to make page scrollable</p>
+<br/>
+<div class="spacer"></div>
+<div class="spacer"></div>
+<p> EOF </p>
+
+<script>
+  "use strict";
+
+  let url = url_base + "vertical-scroll-scrollable-content.html";
+  let iframeElement = document.querySelector("iframe");
+
+  // Wait for the helper scripts to load.
+  promise_test(async() => {
+    if (window.input_api_ready)
+      return Promise.resolve();
+    await new Promise( (r) => {
+      window.resolve_on_input_api_ready = r;
+    });
+  }, "Make sure input injection API is ready.");
+
+  // Sanity-check: Verify we can scroll using the test-API (empty <iframe>).
+  promise_test(async() => {
+    window.scrollTo(0, 0);
+
+    await inject_input("down");
+    assert_greater_than(window.scrollY, 0, "Page must have scrolled down.");
+
+    await inject_input("right");
+    assert_greater_than(window.scrollX, 0, "Page must have scrolled right.");
+  }, "Verify that the page normally scrolls.");
+
+  // Sanity-check: <iframe> normally scrolls.
+  promise_test(async() => {
+    // Make sure <window> can scroll both towards right and bottom.
+    window.scrollTo(0, 0);
+
+    await loadUrlInIframe(iframeElement, url);
+    iframeElement.contentWindow.scrollTo(0, 0);
+
+    await inject_input("down");
+    assert_greater_than(
+      iframeElement.contentWindow.scrollY,
+      0,
+      "<iframe> must have scrolled down.");
+
+
+    // Apply the scroll gesture.
+    await inject_input("right");
+    assert_greater_than(
+      iframeElement.contentWindow.scrollX,
+      0,
+      "<iframe> must have scrolled right.");
+
+  }, "Verify that the <iframe> normally scrolls.");
+
+  // Disable 'vertical-scroll': <iframe> should only scroll horizontally.
+  promise_test(async() => {
+    window.scrollTo(0, 0);
+
+    // Disallow vertical scroll and reload the <iframe>.
+    setFeatureState(iframeElement, "vertical-scroll", "'none'");
+    await loadUrlInIframe(iframeElement, url);
+    iframeElement.contentWindow.scrollTo(0, 0);
+
+    // Apply the scroll gesture. Main frame should and <iframe> should not
+    // scroll vertically.
+    await inject_input("down");
+    assert_equals(iframeElement.contentWindow.scrollY,
+                  0,
+                  "<iframe> must not scroll vertically.");
+    assert_greater_than(window.scrollY,
+                        0,
+                       "Page must scroll vertically.");
+
+    window.scrollTo(0, 0);
+    iframeElement.contentWindow.scrollTo(0, 0);
+
+    await inject_input("right");
+    assert_greater_than(iframeElement.contentWindow.scrollX,
+                        0,
+                        "<iframe> must have scrolled right.");
+  }, "When 'vertical-scroll' is disabled in a document, scrollable contents " +
+     "can only *horizontally* scroll.");
+</script>
diff --git a/testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-disabled-scrollbar-tentative.html b/testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-disabled-scrollbar-tentative.html
new file mode 100644
index 0000000000..6036234de1
--- /dev/null
+++ b/testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-disabled-scrollbar-tentative.html
@@ -0,0 +1,4 @@
+<!doctype html>
+<title>vertical-scroll test for vertical scrollbar</title>
+<link rel="match" href="/feature-policy/experimental-features/resources/vertical-scroll-scrollbar-ref.html?no-vertical-scrollbar">
+<iframe src="/feature-policy/experimental-features/resources/vertical-scroll-scrollable-content.html" allow="vertical-scroll 'none'"></iframe>
diff --git a/testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-main-frame-manual.tentative.html b/testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-main-frame-manual.tentative.html
new file mode 100644
index 0000000000..34cf142d45
--- /dev/null
+++ b/testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-main-frame-manual.tentative.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<title>Ensure 'vertical-scroll' does not affect main frame</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/feature-policy/experimental-features/resources/common.js"></script>
+<script src="/feature-policy/experimental-features/resources/vertical-scroll.js"></script>
+<style>
+html, body {
+  height: 100%;
+  width: 100%;
+}
+.spacer {
+  width: 100%;
+  height: 100%;
+  margin-top: 100%;
+  margin-bottom: 100%;
+}
+</style>
+<p> Making sure there is room for vertical scroll </p>
+<div class="spacer"></div>
+<div class="spacer"></div>
+</p>EOP</p>
+<script>
+  "use strict";
+
+  // Sanity check.
+  test(() => {
+    assert_false(document.featurePolicy.allowsFeature("vertical-scroll"),
+                 "Expected 'vertical-scroll' to be disabled.");
+  }, "'vertical-scroll' disabled in main document.");
+
+  // Wait for the helper scripts to load.
+  promise_test(async() => {
+    if (window.input_api_ready)
+      return Promise.resolve();
+    await new Promise( (r) => {
+      window.resolve_on_input_api_ready = r;
+    });
+  }, "Make sure input injection API is ready.");
+
+  promise_test(async() => {
+    window.scrollTo(0, 0);
+    await inject_input("down");
+    assert_greater_than(window.scrollY, 0, "Page must have scrolled down.");
+  }, "Verify that the page scrolls vertically.");
+</script>
diff --git a/testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-main-frame-manual.tentative.html.headers b/testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-main-frame-manual.tentative.html.headers
new file mode 100644
index 0000000000..44072fce56
--- /dev/null
+++ b/testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-main-frame-manual.tentative.html.headers
@@ -0,0 +1 @@
+Feature-Policy: vertical-scroll 'none'
diff --git a/testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-scrollintoview.tentative.html b/testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-scrollintoview.tentative.html
new file mode 100644
index 0000000000..689685a497
--- /dev/null
+++ b/testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-scrollintoview.tentative.html
@@ -0,0 +1,117 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/feature-policy/experimental-features/resources/common.js"></script>
+<script src="/feature-policy/experimental-features/resources/vertical-scroll.js"></script>
+<style>
+html, body {
+  height: 100%;
+  width: 100%;
+}
+
+iframe {
+  width: 95%;
+  height: 95%;
+  overflow: scroll;
+  margin-top: 200%;
+}
+
+.spacer {
+  width: 100%;
+  height: 100%;
+  margin-top: 100%;
+  margin-bottom: 100%;
+}
+
+</style>
+<p> An &lt;iframe&gt; further below which is not allowed to block scroll.</p>
+<div class="spacer"></div>
+<iframe></iframe>
+<p> Making sure there is room for vertical scroll </p>
+<script>
+  "use strict";
+
+  let url = url_base + "vertical-scroll-scrollintoview.html";
+  let iframeElement = document.querySelector("iframe");
+
+  function iframeBounds() {
+    return iframeElement.getBoundingClientRect();
+  }
+
+  // Enabled 'vertical-scroll': scrollIntoView should work in all frames.
+  promise_test(async() => {
+    window.scrollTo(0, 0);
+    await loadUrlInIframe(iframeElement, url);
+
+    await sendMessageAndGetResponse(
+      iframeElement.contentWindow,
+      {type: "scrolling-element-bounds"}).then((response) => {
+        let iframeBoundsAtOrigin = {
+          x: 0,
+          y: 0,
+          width: iframeBounds().width,
+          height: iframeBounds().height};
+          let scrollingElementBounds = response.bounds;
+          assert_false(
+            rects_intersect(iframeBoundsAtOrigin, scrollingElementBounds),
+            "Scrolling element should not be visible in <iframe>." +
+            `Scrolling element's bounds is: ${rectToString(response.bounds)}  ` +
+            "but <iframe>'s size is:" +
+            `${iframeBounds().width}x${iframeBounds().height}.`);
+      });
+
+    // Scroll the scrolling element inside the <iframe>.
+    await sendMessageAndGetResponse(iframeElement.contentWindow,
+                                   {type: "scroll"});
+    // The page should have scrolled vertically.
+      assert_greater_than(window.scrollY,
+                          0,
+                          "Main frame must scroll vertically.");
+    }, "Calling 'scrollIntoView()' inside a <iframe> will propagate up by" +
+       " default('vertical-scroll' enabled).");
+
+  // Disabled 'vertical-scroll': The scope of scrollIntoView is within the set
+  // of disabled frames (does not propagate to main frame).
+  promise_test(async() => {
+    window.scrollTo(0, 0);
+    setFeatureState(iframeElement, "vertical-scroll", "'none'");
+    await loadUrlInIframe(iframeElement, url);
+
+    await sendMessageAndGetResponse(
+      iframeElement.contentWindow,
+      {type: "scrolling-element-bounds"}).then((response) => {
+      let iframeBoundsAtOrigin = {
+        x: 0,
+        y: 0,
+        width: iframeBounds().width,
+        height: iframeBounds().height};
+      let scrollingElementBounds = response.bounds;
+      assert_false(rects_intersect(iframeBoundsAtOrigin, scrollingElementBounds),
+            "Scrolling element should not be visible in <iframe>." +
+            `Scrolling element's bounds is: ${rectToString(response.bounds)}` +
+            "but <iframe>'s size is:" +
+            `${iframeBounds().width}x${iframeBounds().height}.`);
+      });
+
+    // Scroll scrolling element inside the <iframe>.
+    await sendMessageAndGetResponse(iframeElement.contentWindow,
+      {type: "scroll"}).then((response) => {
+      // Make sure the nested <iframe> is visible.
+      let scrollingElementBounds = response.bounds;
+      let iframeBoundsAtOrigin = {
+          x: 0,
+          y: 0,
+          width: iframeBounds().width,
+          height: iframeBounds().height};
+      // The scrolling element should be visible inside <iframe>.
+      assert_true(rects_intersect(iframeBoundsAtOrigin, scrollingElementBounds),
+          "Scrolling element should be visible in <iframe>." +
+          `Scrolling element's bounds is: ${rectToString(response.bounds)}` +
+          "but <iframe>'s size is:" +
+          `${iframeBounds().width}, ${iframeBounds().height}.`);
+      // The page however should not have scrolled.
+      assert_equals(window.scrollY, 0, "Main frame must not scroll vertically.");
+    });
+    }, "Calling 'scrollIntoView()' inside a <iframe> with" +
+       " 'vertical-scroll none;'will not propagate upwards.");
+</script>
diff --git a/testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-touch-action-manual.tentative.html b/testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-touch-action-manual.tentative.html
new file mode 100644
index 0000000000..c1b5f1d076
--- /dev/null
+++ b/testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-touch-action-manual.tentative.html
@@ -0,0 +1,103 @@
+<!doctype html>
+<meta name="timeout" content="long">
+<title>vertical-scroll test for touch-action</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/feature-policy/experimental-features/resources/common.js"></script>
+<script src="/feature-policy/experimental-features/resources/vertical-scroll.js"></script>
+<style>
+html, body {
+  height: 100%;
+  width: 100%;
+}
+
+iframe {
+  width: 90%;
+  height: 90%;
+  margin: 0;
+  padding: 0;
+}
+
+.spacer {
+  width: 100%;
+  height: 100%;
+  margin: 100%;
+}
+</style>
+<iframe></iframe>
+<br/>
+<p>Spacers below to make page scrollable</p>
+<br/>
+<div class="spacer"></div>
+<div class="spacer"></div>
+<p> EOF </p>
+
+<script>
+  "use strict";
+
+  let url = url_base + "vertical-scroll-touch-action.html";
+  let iframeElement = document.querySelector("iframe");
+
+  // Wait for the helper scripts to load.
+  promise_test(async() => {
+    if (window.input_api_ready)
+      return Promise.resolve();
+    await new Promise( (r) => {
+      window.resolve_on_input_api_ready = r;
+    });
+  }, "Make sure input injection API is ready.");
+
+  // Sanity-check: Verify we can scroll using the test-API (empty <iframe>).
+  promise_test(async() => {
+    window.scrollTo(0, 0);
+
+    await inject_input("down");
+    assert_greater_than(window.scrollY, 0, "Page must have scrolled down.");
+
+    await inject_input("right");
+    assert_greater_than(window.scrollX, 0, "Page must have scrolled right.");
+  }, "Verify that the page normally scrolls.");
+
+  // Enable 'vertical-scroll': "touch-action" should be able to block scroll.
+  promise_test(async() => {
+    // Make sure <window> can scroll both towards right and bottom.
+    window.scrollTo(0, 0);
+
+    await loadUrlInIframe(iframeElement, url);
+
+    // Apply the scroll gesture.
+    await inject_input("down");
+
+    // The scroll should normally bubble and affect this page, but the <iframe>
+    // is allowed to block it.
+    assert_equals(window.scrollY,
+                  0,
+                  "Main frame must not scroll vertically");
+  }, "Vertical scrolling through 'touch-action' can normally be blocked if" +
+     " 'pan-y' is not present.");
+
+  // Disable 'vertical-scroll': "touch-action" should not be able to block
+  // scroll.
+  promise_test(async() => {
+    window.scrollTo(0, 0);
+
+    // Disallow vertical scroll and reload the <iframe>.
+    setFeatureState(iframeElement, "vertical-scroll", "'none'");
+    await loadUrlInIframe(iframeElement, url);
+
+    // Apply the scroll gesture. Main frame should scroll vertically.
+    await inject_input("down");
+
+    assert_greater_than(window.scrollY,
+                        0,
+                        "Main frame must scroll vertically.");
+    window.scrollTo(0, 0);
+
+    await inject_input("right");
+    assert_equals(
+        window.scrollX,
+        0,
+        "'pan-x' can be blocked even when 'vertical-scroll' is disabled");
+  }, "Vertical scrolling (and only vertical scrolling) through 'touch-action'" +
+     " cannot be blocked by a disabled frame.");
+</script>
diff --git a/testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-touch-block-manual.tentative.html b/testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-touch-block-manual.tentative.html
new file mode 100644
index 0000000000..82f6ca527f
--- /dev/null
+++ b/testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-touch-block-manual.tentative.html
@@ -0,0 +1,237 @@
+<!doctype html>
+<title>vertical-scroll test for touch-action</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/feature-policy/experimental-features/resources/common.js"></script>
+<script src="/feature-policy/experimental-features/resources/vertical-scroll.js"></script>
+<style>
+html, body {
+  height: 100%;
+  width: 100%;
+}
+
+iframe {
+  width: 90%;
+  height: 90%;
+  margin: 0;
+  padding: 0;
+}
+
+.spacer {
+  width: 100%;
+  height: 100%;
+  margin: 100%;
+}
+</style>
+<iframe></iframe>
+<br/>
+<p>Spacers below to make page scrollable</p>
+<br/>
+<div class="spacer"></div>
+<div class="spacer"></div>
+<p> EOF </p>
+
+<script>
+  "use strict";
+
+  let url = url_base + "vertical-scroll-touch-block.html";
+  let iframeElement = document.querySelector("iframe");
+
+  // Wait for the helper scripts to load.
+  promise_test(async() => {
+    if (window.input_api_ready)
+      return Promise.resolve();
+    await new Promise( (r) => {
+      window.resolve_on_input_api_ready = r;
+    });
+
+  }, "Make sure input injection API is ready.");
+
+  // Sanity-check: Verify we can scroll using the test-API. The <iframe> with no
+  // query arguments would not preventDefault() any events.
+  promise_test(async() => {
+    window.scrollTo(0, 0);
+    await loadUrlInIframe(iframeElement, url);
+
+    await inject_scroll("down");
+    assert_greater_than(window.scrollY, 0, "Page must have scrolled down.");
+
+    await inject_scroll("right");
+    assert_greater_than(window.scrollX, 0, "Page must have scrolled right.");
+  }, "Verify that the page normally scrolls.");
+
+  // Enable 'vertical-scroll': Blocking "touchstart" can block scrolling.
+  promise_test(async() => {
+    window.scrollTo(0, 0);
+    setFeatureState(iframeElement, "vertical-scroll", "*");
+    await loadUrlInIframe(iframeElement, url);
+    await sendMessageAndGetResponse(iframeElement.contentWindow,
+                                    {
+                                      event_type: "touchstart",
+                                      query: "#blocker",
+                                      prevent: true
+                                    });
+
+    await inject_scroll("down");
+    assert_equals(window.scrollY,
+                  0,
+                  "Main frame must not scroll vertically.");
+  }, "Calling 'preventDefault' on 'touchstart' blocks vertical scroll when " +
+     " the feature is enabled.");
+
+  // Disable 'vertical-scroll': Blocking "touchstart" cannot block vertical
+  // scroll.
+  promise_test(async() => {
+    window.scrollTo(0, 0);
+    setFeatureState(iframeElement, "vertical-scroll", "'none'");
+    await loadUrlInIframe(iframeElement, url);
+    await sendMessageAndGetResponse(iframeElement.contentWindow,
+                                    {
+                                      event_type: "touchstart",
+                                      query: "#blocker",
+                                      prevent: true
+                                    });
+
+    await inject_scroll("down");
+    assert_greater_than(window.scrollY,
+                        0,
+                        "Main frame must scroll vertically.");
+
+    // Horizontal scrolling must still be blocked.
+    window.scrollTo(0, 0);
+    await inject_scroll("right");
+    assert_equals(window.scrollX,
+                  0,
+                  "Main frame must not scroll horizontally.");
+  }, "When feature is disabled, calling 'preventDefault' on 'touchstart' does" +
+     " not block vertical scroll, but still bocks horizontal scroll.");
+
+  // Enable 'vertical-scroll': Blocking "touchmove" can block scrolling.
+  promise_test(async() => {
+    // Make sure <window> can scroll both towards right and bottom.
+    window.scrollTo(0, 0);
+    setFeatureState(iframeElement, "vertical-scroll", "*");
+    await loadUrlInIframe(iframeElement, url);
+    await sendMessageAndGetResponse(iframeElement.contentWindow,
+                                    {
+                                      event_type: "touchmove",
+                                      query: "#blocker",
+                                      prevent: true
+                                    });
+
+    await inject_scroll("down");
+    assert_equals(window.scrollY,
+                  0,
+                  "Main frame must not scroll vertically");
+  }, "Calling 'preventDefault' on 'touchmove' blocks vertical scroll when " +
+     "the feature is enabled.");
+
+  // Disable 'vertical-scroll': Blocking "touchmove" cannot block vertical
+  // scroll.
+  promise_test(async() => {
+    window.scrollTo(0, 0);
+    setFeatureState(iframeElement, "vertical-scroll", "'none'");
+    await loadUrlInIframe(iframeElement, url);
+    await sendMessageAndGetResponse(iframeElement.contentWindow,
+                                    {
+                                      event_type: "touchmove",
+                                      query: "#blocker",
+                                      prevent: true
+                                    });
+    await new Promise((r) => {
+      window.setTimeout(r, 100);
+    });
+
+    await inject_scroll("down");
+    assert_greater_than(window.scrollY,
+                        0,
+                        "Main frame must scroll vertically.");
+  }, "When feature is disabled, calling 'preventDefault' on 'touchmove' does" +
+     " not block vertical scroll.");
+
+  // Disable 'vertical-scroll': Add a non-preventing handler, and then a
+  // preventing handler and verify vertical scroll is possible and horizontal
+  // is blocked.
+  promise_test(async() => {
+    setFeatureState(iframeElement, "vertical-scroll", "'none'");
+    await loadUrlInIframe(iframeElement, url);
+
+    // Add a non-blocking handler.
+    await sendMessageAndGetResponse(iframeElement.contentWindow,
+                                    {
+                                      event_type: "touchstart",
+                                      query: "#blocker",
+                                      prevent: false
+                                    });
+
+    window.scrollTo(0, 0);
+    await inject_scroll("down");
+    assert_greater_than(window.scrollY, 0, "Page must have scrolled down.");
+
+    window.scrollTo(0, 0);
+    await inject_scroll("right");
+    assert_greater_than(window.scrollX, 0, "Page must have scrolled right.");
+
+    // Add a blocking handler.
+    await sendMessageAndGetResponse(iframeElement.contentWindow,
+                                    {
+                                      event_type: "touchstart",
+                                      query: "#blocker",
+                                      prevent: true
+                                    });
+    window.scrollTo(0, 0);
+    await inject_scroll("down");
+    assert_greater_than(window.scrollY,
+                        0,
+                        "Page must have scrolled down (preventing handler).");
+
+    window.scrollTo(0, 0);
+    await inject_scroll("right");
+    assert_equals(window.scrollX,
+                  0,
+                  "Page must not have scrolled horizontally.");
+  }, "Verify that starting with a non-preventing listener and then switching" +
+     " to a preventing one works as intended.");
+
+  // Disable 'vertical-scroll': A preventing 'touchstart' handler does not allow
+  // other multi-touch actions such as 'pinch-zoom'.
+  promise_test(async() => {
+    assert_true(!!window.visualViewport,
+                "'visualViewport' is needed for this test.");
+
+    setFeatureState(iframeElement, "vertical-scroll", "'none'");
+    await loadUrlInIframe(iframeElement, url);
+    await sendMessageAndGetResponse(iframeElement.contentWindow,
+                                    {
+                                      event_type: "touchstart",
+                                      query: "#blocker",
+                                      prevent: false
+                                    });
+
+    // Sanity check: Pinch zoom in should work since 'touchstart' is not
+    // preventing.
+    let current_scale_factor = window.visualViewport.scale;
+    await inject_zoom("in");
+    let new_scale_factor = window.visualViewport.scale;
+    assert_greater_than(
+        new_scale_factor,
+        current_scale_factor,
+        "Pinch zoom should work since 'touchstart' is not prevented.");
+
+    // Add a preventing handler and verify pinch zoom is now blocked.
+    await sendMessageAndGetResponse(iframeElement.contentWindow,
+                                    {
+                                      event_type: "touchstart",
+                                      query: "#blocker",
+                                      prevent: true
+                                    });
+    current_scale_factor = new_scale_factor;
+    await inject_zoom("out");
+    new_scale_factor = window.visualViewport.scale;
+    assert_equals(
+        new_scale_factor,
+        current_scale_factor,
+        "Pinch zoom must be blocked.");
+  }, "Verify that pinch zoom is blocked in frames with 'vertical-scroll' none'" +
+     " where 'touchstart' is prevent defaulted.");
+</script>
diff --git a/testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-wheel-block-manual.tentative.html b/testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-wheel-block-manual.tentative.html
new file mode 100644
index 0000000000..398aa1f5af
--- /dev/null
+++ b/testing/web-platform/tests/feature-policy/experimental-features/vertical-scroll-wheel-block-manual.tentative.html
@@ -0,0 +1,145 @@
+<!doctype html>
+<title>vertical-scroll test for 'mousewheel'</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/feature-policy/experimental-features/resources/common.js"></script>
+<script src="/feature-policy/experimental-features/resources/vertical-scroll.js"></script>
+<style>
+html, body {
+  height: 100%;
+  width: 100%;
+}
+
+iframe {
+  width: 90%;
+  height: 90%;
+  margin: 0;
+  padding: 0;
+}
+
+.spacer {
+  width: 100%;
+  height: 100%;
+  margin: 100%;
+}
+
+</style>
+<iframe></iframe>
+<br/>
+<p>Spacers below to make page scrollable</p>
+<br/>
+<div class="spacer"></div>
+<div class="spacer"></div>
+<p> EOF </p>
+<script>
+  "use strict";
+
+  let url = url_base + "vertical-scroll-wheel-block.html";
+  function iframeElement() {
+    return document.querySelector("iframe");
+  }
+
+  // Used as the polling interval when waiting for a specific condition.
+  let verify_scroll_offset_delay = 5;
+  let no_scroll_timout = 50;
+
+  function waitUntilSatisfied(testInstance, predicate) {
+    return new Promise((r) => {
+      function testPredicate() {
+        if (predicate()) {
+          r();
+        } else {
+          testInstance.step_timeout(testPredicate, verify_scroll_offset_delay);
+        }
+      }
+      testPredicate();
+    });
+  }
+
+  function resetScroll(testInstance) {
+    window.scrollTo({top: 0, left: 0, behavior: "instant"});
+    return waitUntilSatisfied(testInstance, () => {
+      return window.scrollX === 0 && window.scrollY === 0;
+    });
+  }
+
+  function waitForMinimumScrollOffset(testInstance, minX, minY) {
+    return waitUntilSatisfied(testInstance, () => {
+      return window.scrollX >= minX && window.scrollY >= minY;
+    });
+  }
+
+  function waitFor(testInstance, delay) {
+    let checked_once = false;
+    return waitUntilSatisfied(testInstance, () => {
+      if (checked_once)
+        return true;
+      checked_once = true;
+      return false;
+    });
+  }
+
+  // Wait for the helper scripts to load.
+  promise_test(async() => {
+    if (window.input_api_ready)
+      return Promise.resolve();
+    await new Promise((r) => {
+      window.resolve_on_input_api_ready = r;
+    });
+  }, "Make sure input injection API is ready.");
+
+  // Sanity-check: Test API for scrolling along y-axis works as expected.
+  promise_test(async(testInstance) => {
+    await resetScroll(testInstance);
+    await inject_wheel_scroll("down");
+    await waitForMinimumScrollOffset(testInstance, 0, 1);
+    assert_greater_than(window.scrollY, 0, "Expected vertical scroll.");
+  }, "Sanity-check: the page scrolls vertically in response to vertical wheel.");
+
+  // Sanity-check: Test API for scrolling along x-axis works as expected.
+  promise_test(async(testInstance) => {
+    await resetScroll(testInstance);
+    await inject_wheel_scroll("right");
+    await waitForMinimumScrollOffset(testInstance, 1, 0);
+    assert_greater_than(window.scrollX, 0, "Expected horizontal scroll.");
+  }, "Sanity-check: the page scrolls horizontally in response to horizontal wheel.");
+
+  // Test that when 'vertical-scroll' is enabled, vertical scroll can be
+  // blocked by canceling 'wheel' event.
+  promise_test(async(testInstance) => {
+    setFeatureState(iframeElement(), "vertical-scroll", "*");
+    await loadUrlInIframe(iframeElement(), url);
+
+    await resetScroll(testInstance);
+    await inject_wheel_scroll("down")
+    await waitFor(testInstance, no_scroll_timout);
+    assert_equals(window.scrollY, 0, "Did not expected vertical scroll.");
+  }, "When 'vertical-scroll' is enabled canceling vertical 'wheel' " +
+     "blocks vertical scrolling.");
+
+  // Test that when 'vertical-scroll' is disabled, vertical scroll cannot
+  // be blocked by canceling 'wheel' event.
+  promise_test(async(testInstance) => {
+    setFeatureState(iframeElement(), "vertical-scroll", "'none'");
+    await loadUrlInIframe(iframeElement(), url);
+
+    await resetScroll(testInstance);
+    await inject_wheel_scroll("down");
+    await waitForMinimumScrollOffset(testInstance, 0, 1);
+    assert_greater_than(window.scrollY, 0, "Expected vertical scroll.");
+  }, "When 'vertical-scroll' is disabled canceling vertical 'wheel' " +
+     "does not block vertical scrolling.");
+
+  // Test that when 'vertical-scroll' is disabled, horizontal scroll can be
+  // blocked by canceling 'wheel' event.
+  promise_test(async(testInstance) => {
+    setFeatureState(iframeElement(), "vertical-scroll", "'none'");
+    await loadUrlInIframe(iframeElement(), url);
+
+    await resetScroll(testInstance);
+    await inject_wheel_scroll("right");
+    await waitFor(testInstance, no_scroll_timout);
+    assert_equals(window.scrollX, 0, "Did not expect horizontal scroll.");
+  }, "When 'vertical-scroll' is disabled canceling horizontal 'wheel' " +
+     "blocks horizontal scrolling.");
+</script>
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