Canvas test_url: wait until image is loaded

The loadImages() function has been waiting already since
6318560eca7e3247a63620ce24d2d7e291dd5d84); but test_url() was not
waiting, which could result in CI flakiness. Anyway tryVerify is better
than waiting 200ms every time it's slow, and will give us a failure
message about isImageLoaded() if it fails.

Task-number: QTBUG-41043
Change-Id: I0bb552d3452d85342d2ffa3b6becded5b01177a8
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>
(cherry picked from commit e37d2dac8ae680d36a531f0388ec3216e5dfb366)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/tests/auto/quick/qquickcanvasitem/data/tst_image.qml b/tests/auto/quick/qquickcanvasitem/data/tst_image.qml
index 1f695d7080..c81d9d447b 100644
--- a/tests/auto/quick/qquickcanvasitem/data/tst_image.qml
+++ b/tests/auto/quick/qquickcanvasitem/data/tst_image.qml
@@ -11,8 +11,7 @@ CanvasTestCase {
        canvas.loadImage('rgrg-256x256.png');
        canvas.loadImage('ggrr-256x256.png');
        canvas.loadImage('broken.png');
-       while (!canvas.isImageLoaded('green.png'))
-          wait(200);
+       tryVerify(function() { return canvas.isImageLoaded('green.png'); })
    }
 
    function test_3args(row) {
@@ -223,6 +222,7 @@ CanvasTestCase {
        var ctx = canvas.getContext('2d');
 
        canvas.loadImage(testCase.green);
+       tryVerify(function() { return canvas.isImageLoaded(testCase.green); })
        ctx.drawImage(testCase.green, 0, 0);
        comparePixel(ctx, 0,0, 0,255,0,255,2);
    }