SquishTests: Use openDocument()'s return for verifying project tree

It's used anyway, relies on the expected project
tree and works around a problem on some machines.

Change-Id: Ic1e3e7a3f492f37d70c4409699ca78ad548d7445
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

tests/system/suite_QMLS/tst_QMLS04/test.py

@@ -40,17 +40,16 @@ def main():
     myCompTE = "SampleApp.SampleApp.qml\\.qrc./.MyComponent\\.qml"
     # there should be new QML file generated with name "MyComponent.qml"
     try:
-        waitForObjectItem(":Qt Creator_Utils::NavigationTreeView", myCompTE, 5000)
+        # openDocument() doesn't wait for expected elements, so it might be faster than the updates
+        # to the tree. Explicitly wait here to avoid timing issues. Using wFOI() instead of
+        # snooze() allows to proceed earlier, just in case it can find the item.
+        waitForObjectItem(":Qt Creator_Utils::NavigationTreeView",
+                          addBranchWildcardToRoot(myCompTE), 2000)
     except:
-        try:
+        pass
-            waitForObjectItem(":Qt Creator_Utils::NavigationTreeView", addBranchWildcardToRoot(myCompTE), 1000)
-        except:
-            test.fail("Refactoring failed - file MyComponent.qml was not generated properly in project explorer")
-            saveAndExit()
-            return
-    test.passes("Refactoring - file MyComponent.qml was generated properly in project explorer")
     # open MyComponent.qml file for verification
-    if not openDocument(myCompTE):
+    if not test.verify(openDocument(myCompTE),
+                       "Was MyComponent.qml properly generated in project explorer?"):
         test.fatal("Could not open MyComponent.qml.")
         saveAndExit()
         return