Canvas: add a testcase for QSGSimpleTextureNode crash.

Task-number: QTBUG-47714
Change-Id: I8ecf2673ebc5de3d0fe1dec8a67bee81f5d4fb8f
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@theqtcompany.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/tests/auto/quick/qquickcanvasitem/data/tst_canvas.qml b/tests/auto/quick/qquickcanvasitem/data/tst_canvas.qml
index 5960e53557..93f85107a7 100644
--- a/tests/auto/quick/qquickcanvasitem/data/tst_canvas.qml
+++ b/tests/auto/quick/qquickcanvasitem/data/tst_canvas.qml
@@ -677,5 +677,27 @@ CanvasTestCase {
         waitForRendering(implicitlySizedItem);
         comparePixel(implicitlySizedItem.canvas.context, xCenter, yCenter, 0, 0, 0, 255);
     }
+
+    Component {
+        id: simpleTextureNodeUsageComponent
+
+        Canvas {
+            id: canvas
+            anchors.fill: parent
+
+            onPaint: {
+                var ctx = canvas.getContext("2d");
+                ctx.clearRect(0, 0, 200, 200);
+            }
+        }
+    }
+
+    function test_simpleTextureNodeUsage() {
+        var canvas = simpleTextureNodeUsageComponent.createObject(container);
+        verify(canvas);
+        wait(0);
+        // Shouldn't crash.
+        canvas.requestPaint();
+    }
 }
 }