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(); }