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+<!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>