chromium/third_party/blink/web_tests/external/wpt/pointerevents/pointerevent_mouse_capture_change_hover.html

<!DOCTYPE HTML>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="/resources/testdriver-actions.js"></script>
<style>
body {
  user-select: none;
}
#green:hover {
  background-color: red;
}
#blue:hover {
  background-color: red;
}
#green {
  background-color: green;
}
#blue {
  background-color: blue;
}
div.box {
  margin: 5px;
  padding: 20px;
  width: 50px;
  height: 50px;
}
</style>
<body onload="run()">
  <div id="green" class="box"></div>
  <div id="blue" class="box"></div>
</body>
<script>
var receivedEventList = [];
var setcapture = "";

let testEventList = ['pointerup', 'pointerdown', 'pointermove', 'gotpointercapture', 'lostpointercapture', "pointerover", "pointerout", "pointerleave", "pointerenter"];
testEventList.forEach(function(eventName) {
  green.addEventListener(eventName, logEvent);
  blue.addEventListener(eventName, logEvent);
});

function logEvent(event) {
  receivedEventList.push(event.target.id + " received " + event.type)
}

function setCaptureGreen(event) {
  green.setPointerCapture(event.pointerId);
}

function setCaptureBlue(event) {
  blue.setPointerCapture(event.pointerId);
}

function releaseCapture(event) {
  if (event.target.hasPointerCapture(event.pointerId)) {
    event.target.releasePointerCapture(event.pointerId);
  }
}

function run() {
  promise_test (async() => {
    // Move to (1, 1) to reset hovering.
    await new test_driver.Actions().pointerMove(1, 1).send();
    receivedEventList = [];

    // pointerdown at green -> set capture to green -> green receive the following moves.
    document.addEventListener("pointerdown", setCaptureGreen);

    await new test_driver.Actions()
                         .addPointer("mouse")
                         .pointerMove(25, 25, {origin: green})
                         .pointerDown()
                         .pointerMove(30, 30, {origin: green})
                         .pointerMove(25, 25, {origin: blue})
                         .send();

    expectedEventList = ["green received pointerover",
                         "green received pointerenter",
                         "green received pointermove",
                         "green received pointerdown",
                         "green received gotpointercapture",
                         "green received pointermove",
                         "green received pointermove"];

    assert_array_equals(receivedEventList, expectedEventList, "Received events: " + receivedEventList);
    assert_equals(getComputedStyle(green).backgroundColor, "rgb(255, 0, 0)", "green should be red (hover).");
    assert_equals(getComputedStyle(blue).backgroundColor, "rgb(0, 0, 255)", "blue should be blue.");
    document.removeEventListener("pointerdown", setCaptureGreen);
    // Release mouse button.
    await new test_driver.Actions().addPointer("mouse").pointerUp().send();
  }, "Mouse down and capture to green.");

  promise_test (async() => {
    // Move to (1, 1) to reset hovering.
    await new test_driver.Actions().addPointer("mouse").pointerMove(1, 1).send();
    receivedEventList = [];

    // pointerdown at green -> set capture to blue -> blue receive the following moves.
    document.addEventListener("pointerdown", setCaptureBlue);

    await new test_driver.Actions()
                         .addPointer("mouse")
                         .pointerMove(25, 25, {origin: green})
                         .pointerDown()
                         .pointerMove(30, 30, {origin: green})
                         .pointerMove(31, 31, {origin: green})
                         .send();

    expectedEventList = ["green received pointerover",
                         "green received pointerenter",
                         "green received pointermove",
                         "green received pointerdown",
                         "green received pointerout",
                         "green received pointerleave",
                         "blue received pointerover",
                         "blue received pointerenter",
                         "blue received gotpointercapture",
                         "blue received pointermove",
                         "blue received pointermove"];

    assert_array_equals(receivedEventList, expectedEventList, "Received events: " + receivedEventList);
    assert_equals(getComputedStyle(green).backgroundColor, "rgb(0, 128, 0)", "green should be green.");
    assert_equals(getComputedStyle(blue).backgroundColor, "rgb(255, 0, 0)", "blue should be red (hover).");
    document.removeEventListener("pointerdown", setCaptureBlue);
    // Release mouse button.
    await new test_driver.Actions().addPointer("mouse").pointerUp().send();
  }, "Mouse down at green and capture to blue.");

  promise_test (async() => {
    // Move to (1, 1) to reset hovering.
    await new test_driver.Actions().addPointer("mouse").pointerMove(1, 1).send();
    receivedEventList = [];

    // pointerdown at green -> set capture to green -> green receive first move -> release capture -> blue receive the next move
    green.addEventListener("pointerdown", setCaptureGreen);
    green.addEventListener("pointermove", releaseCapture);

    await new test_driver.Actions()
                         .addPointer("mouse")
                         .pointerMove(25, 25, {origin: green})
                         .pointerDown()
                         .pointerMove(30, 30, {origin: blue})
                         .pointerMove(25, 25, {origin: blue})
                         .send();

    expectedEventList = ["green received pointerover",
                         "green received pointerenter",
                         "green received pointermove",
                         "green received pointerdown",
                         "green received gotpointercapture",
                         "green received pointermove",
                         "green received lostpointercapture",
                         "green received pointerout",
                         "green received pointerleave",
                         "blue received pointerover",
                         "blue received pointerenter",
                         "blue received pointermove"]

    assert_array_equals(receivedEventList, expectedEventList, "Received events: " + receivedEventList);
    assert_equals(getComputedStyle(green).backgroundColor, "rgb(0, 128, 0)", "green should be green.");
    assert_equals(getComputedStyle(blue).backgroundColor, "rgb(255, 0, 0)", "blue should be red (hover).");
    green.removeEventListener("pointerdown", setCaptureBlue);
    green.removeEventListener("pointermove", releaseCapture);
    // Release mouse button.
    await new test_driver.Actions().addPointer("mouse").pointerUp().send();
  }, "Mouse down and capture to green, move to blue and release capture");
}
</script>