QUnit.test('Size by threshold', function (assert) {
    var chart,
        $container = $('#container');

    $container.highcharts({
        chart: {
            type: 'bubble',
            animation: false
        },

        series: [
            {
                animation: false,
                data: [
                    [-5, 0, -5],
                    [-4, 0, -4],
                    [-3, 0, -3],
                    [-2, 0, -2],
                    [-1, 0, -1],
                    [0, 0, 0],
                    [1, 0, 1],
                    [2, 0, 2],
                    [3, 0, 3],
                    [4, 0, 4],
                    [5, 0, 5]
                ],
                sizeByAbsoluteValue: true
            }
        ]
    });

    chart = $container.highcharts();

    assert.strictEqual(
        chart.series[0].points[0].marker.radius,
        chart.series[0].points[10].marker.radius,
        'Equal absolute values give equal bubble size'
    );

    chart.series[0].update({ sizeByAbsoluteValue: false });
    assert.strictEqual(
        parseInt(chart.series[0].points[0].marker.radius, 10) <
            parseInt(chart.series[0].points[10].marker.radius, 10),
        true,
        'Size by threshold: false give different sizes'
    );

    chart.series[0].update({ sizeByAbsoluteValue: true });
    chart.series[0].points[10].update({ z: 4 });
    assert.strictEqual(
        parseInt(chart.series[0].points[0].marker.radius, 10) >
            parseInt(chart.series[0].points[10].marker.radius, 10),
        true,
        'Negative absolute value gives greater bubble size'
    );

    chart.series[0].update({ zThreshold: 1 });
    assert.strictEqual(
        chart.series[0].points[5].marker.radius,
        chart.series[0].points[7].marker.radius,
        'Equal difference to zThreshold gives equal bubble size'
    );

    chart.series[0].update({
        zThreshold: 0,
        data: [
            [0, -3, 3.8],
            [1, 2, 3.799]
        ]
    });

    assert.close(
        chart.series[0].points[0].marker.radius,
        Math.round(chart.series[0].maxPxSize / 2),
        0.5,
        'Correct size of the marker (#8092).'
    );
});
