Fix tst_qlineedit for offscreen rendering and tiling window managers

tst_QLineEdit::QTBUG13520_textNotVisible checks that text is visible
if a QLineEdit is set to Qt::AlignRight. To do that, it writes
some text into a line edit and checks afterwards that the first
character is in the left half of the window. This fails if the window
is larger than twice the length of the text used and thus might fail
in multiple situations where Qt is not in full control over the size
of the windows created, as is the case with tiling window managers.
This patch changes the test to not check for the first character in
the left half of the window, but instead check for the first character
be approximately at the expected position.

Pick-to: 6.0
Change-Id: I18f6de356ea20f4744f3a58cd2b1d76f6a9545a4
Reviewed-by: Ivan Solovev <ivan.solovev@qt.io>
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>

1 files changed, 8 insertions, 3 deletions

diff --git a/tests/auto/widgets/widgets/qlineedit/tst_qlineedit.cpp b/tests/auto/widgets/widgets/qlineedit/tst_qlineedit.cpp
index 6df217d801..a18999d174 100644
--- a/tests/auto/widgets/widgets/qlineedit/tst_qlineedit.cpp
+++ b/tests/auto/widgets/widgets/qlineedit/tst_qlineedit.cpp
@@ -4111,13 +4111,18 @@ void tst_QLineEdit::QTBUG13520_textNotVisible()
     le.setAlignment( Qt::AlignRight | Qt::AlignVCenter);
     le.show();
     QVERIFY(QTest::qWaitForWindowExposed(&le));
-    le.setText("01-ST16-01SIL-MPL001wfgsdfgsdgsdfgsdfgsdfgsdfgsdfg");
+    QString sometext("01-ST16-01SIL-MPL001wfgsdfgsdgsdfgsdfgsdfgsdfgsdfg");
+    le.setText(sometext);
     le.setCursorPosition(0);
     QTest::qWait(100); //just make sure we get he lineedit correcly painted
 
-    QVERIFY(le.cursorRect().center().x() < le.width() / 2);
-
+    auto expectedCursorCoordinate = le.width() - le.fontMetrics().horizontalAdvance(sometext);
+    // cursor does not leave widget to the left:
+    if (expectedCursorCoordinate < 0)
+        expectedCursorCoordinate = 0;
 
+    // compare with some tolerance for margins
+    QVERIFY(qAbs(le.cursorRect().center().x() - expectedCursorCoordinate) < 10);
 }
 
 class UpdateRegionLineEdit : public QLineEdit