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tests: make exposeEventOnShrink_QTBUG54040 not flakey on xcb 

From: https://tronche.com/gui/x/xlib/events/exposure/expose.html

"The circumstances in which the X server generates Expose events
are not as definite as those for other events."

On windows with XCB_GRAVITY_NORTH_WEST flag set we should not get
expose events according to e2665600c0,
but as stated earlier this might not always be true.

Nevertheless, sometimes we get expose event from X server when shrinking
window, but most of the time we don't. Make the test not flakey by
checking that we get at least 1 expose event, instead of exactly 1.
Now running test 500 times in a loop does not fail.

Task-number: QTBUG-63424
Change-Id: I8004e622020cc09e11b7d592faf6d9ee1b9cfee2
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
bb10
Gatis Paeglis 2017-09-26 12:20:30 +02:00
parent 113de68543
commit 542e11ab2b
1 changed files with 8 additions and 4 deletions
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12
tests/auto/gui/kernel/qwindow/tst_qwindow.cpp
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@ -409,13 +409,17 @@ void tst_QWindow::exposeEventOnShrink_QTBUG54040()
QVERIFY(QTest::qWaitForWindowExposed(&window));
const int initialExposeCount = window.received(QEvent::Expose);
int exposeCount = window.received(QEvent::Expose);
window.resize(window.width(), window.height() - 5);
QTRY_COMPARE(window.received(QEvent::Expose), initialExposeCount + 1);
QTRY_VERIFY(window.received(QEvent::Expose) > exposeCount);
exposeCount = window.received(QEvent::Expose);
window.resize(window.width() - 5, window.height());
QTRY_COMPARE(window.received(QEvent::Expose), initialExposeCount + 2);
QTRY_VERIFY(window.received(QEvent::Expose) > exposeCount);
exposeCount = window.received(QEvent::Expose);
window.resize(window.width() - 5, window.height() - 5);
QTRY_COMPARE(window.received(QEvent::Expose), initialExposeCount + 3);
QTRY_VERIFY(window.received(QEvent::Expose) > exposeCount);
}
void tst_QWindow::positioning_data()