[LayoutNG] Add NGLineBoxFragment

third_party/WebKit/Source/core/layout/ng/ng_inline_node_test.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/layout/ng/ng_inline_node.h"
 
 #include "core/layout/LayoutTestHelper.h"
 #include "core/layout/ng/ng_constraint_space.h"
 #include "core/layout/ng/ng_constraint_space_builder.h"
 #include "core/layout/ng/ng_fragment_builder.h"
 #include "core/layout/ng/ng_line_builder.h"
 #include "core/layout/ng/ng_physical_box_fragment.h"
+#include "core/layout/ng/ng_physical_line_box_fragment.h"
 #include "core/layout/ng/ng_physical_text_fragment.h"
 #include "core/layout/ng/ng_text_fragment.h"
 #include "core/layout/ng/ng_text_layout_algorithm.h"
 #include "core/style/ComputedStyle.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blink {
 
 class NGInlineNodeForTest : public NGInlineNode {
  public:
@@ skipping 68 matching lines @@
                   Vector<RefPtr<const NGPhysicalTextFragment>>* fragments_out) {
     RefPtr<NGConstraintSpace> constraint_space =
         NGConstraintSpaceBuilder(kHorizontalTopBottom)
             .ToConstraintSpace(kHorizontalTopBottom);
     NGLineBuilder line_builder(node, constraint_space.get());
 
     NGTextLayoutAlgorithm algorithm(node);
     algorithm.LayoutInline(&line_builder);
 
     RefPtr<NGLayoutResult> result = line_builder.CreateFragments();
-    for (const auto& child :
-         toNGPhysicalBoxFragment(result->PhysicalFragment().get())
-             ->Children()) {
+    const NGPhysicalBoxFragment* container =
+        toNGPhysicalBoxFragment(result->PhysicalFragment().get());
+    EXPECT_EQ(container->Children().size(), 1u);
+    const NGPhysicalLineBoxFragment* line =
+        toNGPhysicalLineBoxFragment(container->Children()[0].get());
+    for (const auto& child : line->Children()) {
       fragments_out->push_back(toNGPhysicalTextFragment(child.get()));
     }
   }
 
   RefPtr<const ComputedStyle> style_;
   LayoutBlockFlow* layout_block_flow_ = nullptr;
   LayoutObject* layout_object_ = nullptr;
   FontCachePurgePreventer purge_preventer_;
 };
 
@@ skipping 213 matching lines @@
   MinMaxContentSize sizes = node->ComputeMinMaxContentSize();
   // |min_content| should be the width of "BC" because there is an element
   // boundary between "B" and "C" but no break opportunities.
   // TODO(kojii): min_content should be 20, but is 30 until NGLineBuilder
   // implements trailing spaces correctly.
   EXPECT_EQ(30, sizes.min_content);
   EXPECT_EQ(60, sizes.max_content);
 }
 
 }  // namespace blink