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// Copyright (C) 2019 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
import QtQuick 2.4
import QtTest 1.1
Item {
id: root
width: 500
height: 500
Timer {
id: timer
interval: 1
running: true
repeat: true
onTriggered: {
if (myCanvas.parent == root) {
myCanvas.parent = null
} else {
myCanvas.parent = root
}
}
}
Canvas {
id: myCanvas
anchors.fill: parent
property var paintContext: null
function doPaint() {
paintContext.fillStyle = Qt.rgba(1, 0, 0, 1);
paintContext.fillRect(0, 0, width, height);
requestAnimationFrame(doPaint);
}
onAvailableChanged: {
if (available) {
paintContext = getContext("2d")
requestAnimationFrame(doPaint);
}
}
}
TestCase {
name: "invalidContext"
when: myCanvas.parent === null && myCanvas.paintContext !== null
function test_paintContextInvalid() {
verify(myCanvas.paintContext);
var caught = false;
try {
console.log(myCanvas.paintContext.fillStyle);
} catch(e) {
caught = true;
}
verify(caught);
timer.running = false
}
}
}
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