Extend and improve tst_customization

Add more test cases, and clarify the roles of the test styles.
- empty: no delegates at all
- incomplete: has all delegates, but with no bindings that access
  delegates and therefore trigger creation (tests that delegates must
  be created regardless)
- simple: has all delegates and creates bindings to simulate a full
  style
- override: overrides the simple style and tests that the default
  instances of overridden delegates are not created

There are still several non-popup controls that lack deferred
execution. These are marked with QEXPECT_FAIL() to make it easy
to track what's missing. This list still excludes all popups.

Task-number: QTBUG-50992
Change-Id: I70ce42592e7a320251edebfab3030ccc7c0eb978
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/auto/customization/data/styles/override/TextArea.qml b/tests/auto/customization/data/styles/override/TextArea.qml
index 882282f2..66a80882 100644
--- a/tests/auto/customization/data/styles/override/TextArea.qml
+++ b/tests/auto/customization/data/styles/override/TextArea.qml
@@ -55,7 +55,7 @@ Simple.TextArea {
     id: control
     objectName: "textarea-override"
 
-    background: Rectangle {
+    background: Item {
         objectName: "textarea-background-override"
     }
 }