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Original file line number Diff line number Diff line change
@@ -0,0 +1,61 @@
<!DOCTYPE html>

<head>
<meta charset="utf-8">
<title>Ensure that the calling `preventDefault` on a wheel event prevents a scroll from happening</title>
<link rel="author" title="Martin Robinson" href="mailto:mrobinson@igalia.com">
<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>
</head>

<body>
<div id="scroller" style="width: 100px; height: 100px; overflow: scroll; position: relative;">
<div style="position: absolute; width: 100px; height: 500px; background: red;"></div>
<div style="position: absolute; width: 100px; height: 100px; background: green;"></div>
</div>

<script>
function waitForFrame() {
return new Promise(resolve => {
window.requestAnimationFrame(resolve);
});
}

function runTest() {
promise_test(async(t) => {
let wheelEventFired = false;
let scrollEventFired = false;
scroller.addEventListener("wheel", (event) => {
wheelEventFired = true;
event.preventDefault()
});
scroller.addEventListener("scroll", (event) => {
scrollEventFired = true;
event.preventDefault()
});

await new test_driver.Actions()
.addWheel("wheel1")
.scroll(50, 50, 0, 30, {origin: "viewport"})
.pause(1)
.scroll(50, 50, 0, 30, {origin: "viewport"})
.pause(1)
.scroll(50, 50, 0, 30, {origin: "viewport"})
.send();

await waitForFrame();
await waitForFrame();
await waitForFrame();
await waitForFrame();

assert_true(wheelEventFired);
assert_false(scrollEventFired);
}, "When `preventDefault` is called on a WheelEvent, scrolling should be prevented.");
}
window.onload = runTest;
</script>
</body>

Original file line number Diff line number Diff line change
Expand Up @@ -9,9 +9,9 @@
<script>

const TEST_CASES = [
{value: "", expected: "", test: "Empty value"},
{value: "a=b", expected: "a=b", test: "A simple cookie"},
{value: "b=A\0Z", expected: "", test: "A null char"},
{value: "", expected: "", name: "Empty value"},
{value: "a=b", expected: "a=b", name: "A simple cookie"},
{value: "b=A\0Z", expected: "", name: "A null char"},
];

test(function(){
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1 change: 0 additions & 1 deletion tools/wptrunner/wptrunner/executors/executorwebdriver.py
Original file line number Diff line number Diff line change
Expand Up @@ -784,7 +784,6 @@ def _format_send_message_script(self, cmd_id, message_type, status, message=None
obj["message"] = str(message)
return f"window.postMessage({json.dumps(obj)}, '*');"


def _switch_to_frame(self, index_or_elem):
try:
self.webdriver.switch_to_frame(index_or_elem)
Expand Down
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