Add new tests for floats splitting edgecases

DEVSIX-1267

Author: yulian-gaponenko

layout/src/main/java/com/itextpdf/layout/renderer/BlockRenderer.java

@@ -174,7 +174,6 @@ public LayoutResult layout(LayoutContext layoutContext) {
             childRenderer.setParent(this);
             MarginsCollapseInfo childMarginsInfo = null;
 
-            // TODO process correctly for floats with clear
             if (!waitingOverflowFloatRenderers.isEmpty() && FloatingHelper.isClearanceApplied(waitingOverflowFloatRenderers, childRenderer.<ClearPropertyValue>getProperty(Property.CLEAR))) {
                 if (marginsCollapsingEnabled && !isCellRenderer) {
                     marginsCollapseHandler.endMarginsCollapse(layoutBox);
@@ -424,7 +423,7 @@ public LayoutResult layout(LayoutContext layoutContext) {
         applyVerticalAlignment();
 
         FloatingHelper.removeFloatsAboveRendererBottom(floatRendererAreas, this);
-        if (!waitingOverflowFloatRenderers.isEmpty()) { // TODO what if overflow renderer is not null already?
+        if (!waitingOverflowFloatRenderers.isEmpty()) {
             overflowRenderer = createOverflowRenderer(LayoutResult.PARTIAL);
             overflowRenderer.getChildRenderers().addAll(waitingOverflowFloatRenderers);
         }

layout/src/main/java/com/itextpdf/layout/renderer/RootRenderer.java

@@ -70,7 +70,7 @@ public abstract class RootRenderer extends AbstractRenderer {
     private MarginsCollapseHandler marginsCollapseHandler;
     private LayoutArea initialCurrentArea;
     private List<Rectangle> floatRendererAreas;
-    private List<IRenderer> waitingNextPageRenderers = new ArrayList<>(); // TODO process floats with clear
+    private List<IRenderer> waitingNextPageRenderers = new ArrayList<>();
 
     public void addChild(IRenderer renderer) {
         // Some positioned renderers might have been fetched from non-positioned child and added to this renderer,