TEST_F(ScrollableAreaTest, InvalidatesNonCompositedScrollbarsWhenThumbMoves)
{
ScrollbarThemeWithMockInvalidation theme;
OwnPtrWillBeRawPtr<MockScrollableArea> scrollableArea = MockScrollableArea::create(IntPoint(100, 100));
RefPtrWillBeRawPtr<Scrollbar> horizontalScrollbar = Scrollbar::createForTesting(scrollableArea.get(), HorizontalScrollbar, RegularScrollbar, &theme);
RefPtrWillBeRawPtr<Scrollbar> verticalScrollbar = Scrollbar::createForTesting(scrollableArea.get(), VerticalScrollbar, RegularScrollbar, &theme);
EXPECT_CALL(*scrollableArea, horizontalScrollbar()).WillRepeatedly(Return(horizontalScrollbar.get()));
EXPECT_CALL(*scrollableArea, verticalScrollbar()).WillRepeatedly(Return(verticalScrollbar.get()));
// Regardless of whether the theme invalidates any parts, non-composited
// scrollbars have to be repainted if the thumb moves.
EXPECT_CALL(*scrollableArea, layerForHorizontalScrollbar()).WillRepeatedly(Return(nullptr));
EXPECT_CALL(*scrollableArea, layerForVerticalScrollbar()).WillRepeatedly(Return(nullptr));
ASSERT_FALSE(scrollableArea->hasLayerForVerticalScrollbar());
ASSERT_FALSE(scrollableArea->hasLayerForHorizontalScrollbar());
EXPECT_CALL(theme, shouldRepaintAllPartsOnInvalidation()).WillRepeatedly(Return(false));
EXPECT_CALL(theme, invalidateOnThumbPositionChange(_, _, _)).WillRepeatedly(Return(NoPart));
// A scroll in each direction should only invalidate one scrollbar.
scrollableArea->setScrollPosition(DoublePoint(0, 50), ProgrammaticScroll);
EXPECT_FALSE(scrollableArea->horizontalScrollbarNeedsPaintInvalidation());
EXPECT_TRUE(scrollableArea->verticalScrollbarNeedsPaintInvalidation());
scrollableArea->clearNeedsPaintInvalidationForScrollControls();
scrollableArea->setScrollPosition(DoublePoint(50, 50), ProgrammaticScroll);
EXPECT_TRUE(scrollableArea->horizontalScrollbarNeedsPaintInvalidation());
EXPECT_FALSE(scrollableArea->verticalScrollbarNeedsPaintInvalidation());
scrollableArea->clearNeedsPaintInvalidationForScrollControls();
// Forced GC in order to finalize objects depending on the mock object.
Heap::collectAllGarbage();
}
