SpinBox: fix JS callback access

Avoid calling an uninitialized JS callback. This is a regression caused
by lazy creation of the JS callbacks in 1f146d9.

Change-Id: I1816b491ada0509c5664cffbcaa32ca987095b31
Task-number: QTBUG-51114
Reviewed-by: Mitch Curtis <mitch.curtis@theqtcompany.com>
Reviewed-by: Liang Qi <liang.qi@theqtcompany.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/tests/auto/controls/data/tst_spinbox.qml b/tests/auto/controls/data/tst_spinbox.qml
index a2ab5a4a..cdea8b66 100644
--- a/tests/auto/controls/data/tst_spinbox.qml
+++ b/tests/auto/controls/data/tst_spinbox.qml
@@ -305,4 +305,25 @@ TestCase {
         compare(control.baselineOffset, control.contentItem.y + control.contentItem.baselineOffset)
         control.destroy()
     }
+
+    function test_focus() {
+        var control = spinBox.createObject(testCase, {from: 10, to: 1000, value: 100, focus: true})
+        verify(control)
+
+        control.forceActiveFocus()
+        compare(control.activeFocus, true)
+
+        compare(control.from, 10)
+        compare(control.to, 1000)
+        compare(control.value, 100)
+
+        control.focus = false
+        compare(control.activeFocus, false)
+
+        compare(control.from, 10)
+        compare(control.to, 1000)
+        compare(control.value, 100)
+
+        control.destroy()
+    }
 }