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    <head>
        <title>releasePointerCapture on pointerup</title>
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        <h1>Pointer Events Capture Test - releasePointerCapture on pointerup</h1>
        <h4>
            Test Description: This test checks if releasePointerCapture works properly. Complete the following actions:
            <ol>
                <li> Press and hold left mouse button over "Set Capture" button
                <li> Release left mouse button anywhere over the document
            </ol>
        </h4>
        Test passes if the proper behavior of the events is observed.
        <div id="target0" style="background:black; color:white"></div>
        <br>
        <input type="button" id="btnCapture" value="Set Capture">
        <script type='text/javascript'>
            var isPointerCapture = false;
            var pointerupGot = false;
            var count=0;
            var event_log = [];
            var actions_promise;

            var detected_pointertypes = {};
            add_completion_callback(end_of_test);
            function end_of_test() {
                showLoggedEvents();
                showPointerTypes();
            }

            var target0 = document.getElementById('target0');
            var captureButton = document.getElementById('btnCapture');

            setup({ explicit_done: true });

            window.onload = function() {
                on_event(captureButton, 'pointerdown', function(e) {
                    detected_pointertypes[e.pointerType] = true;
                    if(isPointerCapture == false) {
                        isPointerCapture = true;
                        sPointerCapture(e);
                        pointerupGot = false;
                    }
                });

                on_event(target0, 'gotpointercapture', function(e) {
                    event_log.push('gotpointercapture@target0');
                });

                on_event(target0, 'lostpointercapture', function(e) {
                    test(function() {
                        assert_true(pointerupGot, "pointerup was received before lostpointercapture")
                    }, "pointerup was received before lostpointercapture");
                    event_log.push('lostpointercapture@target0');
                    isPointerCapture = false;
                    // Make sure the test finishes after all the input actions are completed.
                    actions_promise.then( () => {
                        done();
                    });
                });

                on_event(target0, 'pointerup', function(e) {
                    event_log.push('pointerup@target0');
                    var thrown = false;
                    try {
                        target0.releasePointerCapture(e.pointerId);
                    } catch(e) {
                        thrown = true;
                    }
                    test(function() {
                        assert_false(thrown, "target0.releasePointerCapture should not throw");
                    }, "target0.releasePointerCapture should not throw");
                    pointerupGot = true;
                });

                // Inject mouse inputs.
                actions_promise = new test_driver.Actions()
                    .pointerMove(0, 0, {origin: captureButton})
                    .pointerDown()
                    .pointerMove(10, 0, {origin: target0})
                    .pointerUp()
                    .send();
            }
        </script>
        <h1>Pointer Events Capture Test</h1>
        <div id="complete-notice">
            <p>Test complete: Scroll to Summary to view Pass/Fail Results.</p>
            <p>The following pointer types were detected: <span id="pointertype-log"></span>.</p>
            <p>The following events were logged: <span id="event-log"></span>.</p>
        </div>
        <div id="log"></div>
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