[layoutng] Support computing min-content and max-content

third_party/WebKit/Source/core/layout/ng/ng_box_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_box.h"
+
+#include "core/layout/ng/ng_fragment.h"
+#include "core/style/ComputedStyle.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace blink {
+namespace {
+class NGBoxTest : public ::testing::Test {
+ protected:
+  void SetUp() override { style_ = ComputedStyle::create(); }
+
+  RefPtr<ComputedStyle> style_;
+};
+
+TEST_F(NGBoxTest, MinAndMaxContent) {
+  const int kWidth = 30;
+
+  RefPtr<ComputedStyle> first_style = ComputedStyle::create();
+  first_style->setWidth(Length(kWidth, Fixed));
+  NGBox* first_child = new NGBox(first_style.get());
+
+  NGBox* box = new NGBox(style_.get());
+  box->SetFirstChild(first_child);
+
+  MinAndMaxContentSizes sizes;
+  while (!box->ComputeMinAndMaxContentSizes(&sizes))
+    continue;
+  EXPECT_EQ(LayoutUnit(kWidth), sizes.min_content);
+  EXPECT_EQ(LayoutUnit(kWidth), sizes.max_content);
+}
+}  // namespace
+}  // namespace blink