[layoutng] Margin support, part 1

third_party/WebKit/Source/core/layout/ng/ng_length_utils_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_length_utils.h"
 
 #include "core/layout/ng/ng_constraint_space.h"
+#include "core/layout/ng/ng_margin_strut.h"
 #include "core/style/ComputedStyle.h"
 #include "platform/CalculationValue.h"
 #include "platform/LayoutUnit.h"
 #include "platform/Length.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
 namespace {
 
@@ skipping 133 matching lines @@
   style_->setMaxHeight(Length(80, Percent));
   EXPECT_EQ(LayoutUnit(240), computeBlockSizeForFragment());
 
   style_->setLogicalHeight(Length(100, Fixed));
   style_->setMinHeight(Length(80, Percent));
   EXPECT_EQ(LayoutUnit(240), computeBlockSizeForFragment());
 
   // TODO(layout-ng): test {min,max}-content on max-height.
 }
 
+TEST_F(NGLengthUtilsTest, testMargins) {
+  style_->setMarginTop(Length(10, Percent));
+  style_->setMarginRight(Length(52, Fixed));
+  style_->setMarginBottom(Length(Auto));
+  style_->setMarginLeft(Length(11, Percent));
+
+  NGConstraintSpace constraintSpace(constructConstraintSpace(200, 300));
+
+  NGBoxMargins margins = computeMargins(constraintSpace, *style_);
+
+  EXPECT_EQ(LayoutUnit(20), margins.blockStart);
+  EXPECT_EQ(LayoutUnit(52), margins.inlineEnd);
+  EXPECT_EQ(LayoutUnit(), margins.blockEnd);
+  EXPECT_EQ(LayoutUnit(22), margins.inlineStart);
+}
+
 }  // namespace
 }  // namespace blink