firefox-main/testing/web-platform/tests/css/css-view-transitions/input-pointer-capture-while-render-blocked.html

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Test Info:

<!DOCTYPE html>
<html>
<title>View transitions: Pointer capture target while rendering is suppressed</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-actions.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<style>
:root {
/* Ensure clicks during the transition fall through the pseudo tree root to
* real DOM */
view-transition-name: none;
}
::view-transition {
/* Ensure clicks during the transition fall through the pseudo tree root to
* real DOM */
pointer-events: none;
width: 0;
height: 0;
}
::view-transition-group(*) {
animation-duration: 30s;
}
#capturetarget {
width: 100px;
height: 100px;
background: green;
}
#transition {
width: 100px;
height: 100px;
background: blue;
contain: paint;
view-transition-name: transitionElement;
}
</style>
<div id="capturetarget"></div>
<div id="transition"></div>
<script>
const captureTarget = document.getElementById("capturetarget");
function waitForEvent(target, name, condition = () => true) {
return new Promise(resolve => {
function func(e) {
if (condition(e)) {
target.removeEventListener(name, func);
resolve(e);
}
}
target.addEventListener(name, func);
});
}
promise_test(async t => {
assert_implements(document.startViewTransition, "Missing document.startViewTransition");
assert_true(!!captureTarget, "Sanity check: captureTarget element exists");
// Need to use a single action to avoid wptrunner implicitly releasing
const action = new test_driver.Actions()
.setContext(window)
.addPointer("mousePointer1", "mouse")
.pointerMove(10, 10, { origin: "viewport", sourceName: "mousePointer1" })
.pointerDown({ sourceName: "mousePointer1" })
// Pause to let the pointerdown handler run: sets capture and starts VT.
.pause(100)
// While render-blocked, move outside capture target
.pointerMove(150, 150, { origin: "viewport", sourceName: "mousePointer1" })
// Pause to let cbDone.resolve() run and transition.ready to settle.
.pause(100)
// After render-blocking, do another move outside capture target
.pointerMove(200, 200, { origin: "viewport", sourceName: "mousePointer1" })
.pointerUp({ sourceName: "mousePointer1" })
.send();
const eDown = await waitForEvent(document, "pointerdown");
assert_equals(eDown.target, captureTarget, "Action should target captureTarget");
captureTarget.setPointerCapture(eDown.pointerId);
const cbDone = Promise.withResolvers();
const transition = document.startViewTransition(() => cbDone.promise);
// Checking for exactly e.clientX==150 might time out
const eMove1 = await waitForEvent(document, "pointermove", e => e.clientX > 120);
assert_equals(eMove1.target, captureTarget, "Capture is still active during render block");
cbDone.resolve();
await transition.ready;
const eMove2 = await waitForEvent(document, "pointermove", e => e.clientX > 170);
assert_equals(eMove2.target, captureTarget, "Capture is still active after render block");
await action;
}, "Input with active pointer capture targets captured element while render-blocked");
</script>
</html>