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 * in the documentation and/or other materials provided with the
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#include "third_party/blink/renderer/core/layout/overflow_model.h"

#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/blink/renderer/core/testing/core_unit_test_helper.h"
#include "third_party/blink/renderer/platform/testing/task_environment.h"

namespace blink {
namespace {

PhysicalRect InitialScrollableOverflow() {
  return PhysicalRect(10, 10, 80, 80);
}

PhysicalRect InitialVisualOverflow() {
  return PhysicalRect(0, 0, 100, 100);
}

class BoxOverflowModelTest : public testing::Test {
 protected:
  BoxOverflowModelTest()
      : scrollable_overflow_(InitialScrollableOverflow()),
        visual_overflow_(InitialVisualOverflow()) {}
  test::TaskEnvironment task_environment_;
  BoxScrollableOverflowModel scrollable_overflow_;
  BoxVisualOverflowModel visual_overflow_;
};

TEST_F(BoxOverflowModelTest, InitialOverflowRects) {
  EXPECT_EQ(InitialScrollableOverflow(),
            scrollable_overflow_.ScrollableOverflowRect());
  EXPECT_EQ(InitialVisualOverflow(), visual_overflow_.SelfVisualOverflowRect());
  EXPECT_TRUE(visual_overflow_.ContentsVisualOverflowRect().IsEmpty());
}

TEST_F(BoxOverflowModelTest, AddSelfVisualOverflowOutsideExpandsRect) {
  visual_overflow_.AddSelfVisualOverflow(PhysicalRect(150, -50, 10, 10));
  EXPECT_EQ(PhysicalRect(0, -50, 160, 150),
            visual_overflow_.SelfVisualOverflowRect());
}

TEST_F(BoxOverflowModelTest, AddSelfVisualOverflowInsideDoesNotAffectRect) {
  visual_overflow_.AddSelfVisualOverflow(PhysicalRect(0, 10, 90, 90));
  EXPECT_EQ(InitialVisualOverflow(), visual_overflow_.SelfVisualOverflowRect());
}

TEST_F(BoxOverflowModelTest, AddSelfVisualOverflowEmpty) {
  BoxVisualOverflowModel visual_overflow(PhysicalRect(0, 0, 600, 0));
  visual_overflow.AddSelfVisualOverflow(PhysicalRect(100, -50, 100, 100));
  visual_overflow.AddSelfVisualOverflow(PhysicalRect(300, 300, 0, 10000));
  EXPECT_EQ(PhysicalRect(100, -50, 100, 100),
            visual_overflow.SelfVisualOverflowRect());
}

TEST_F(BoxOverflowModelTest,
       AddSelfVisualOverflowDoesNotAffectContentsVisualOverflow) {
  visual_overflow_.AddSelfVisualOverflow(PhysicalRect(300, 300, 300, 300));
  EXPECT_TRUE(visual_overflow_.ContentsVisualOverflowRect().IsEmpty());
}

TEST_F(BoxOverflowModelTest, AddContentsVisualOverflowFirstCall) {
  visual_overflow_.AddContentsVisualOverflow(PhysicalRect(0, 0, 10, 10));
  EXPECT_EQ(PhysicalRect(0, 0, 10, 10),
            visual_overflow_.ContentsVisualOverflowRect());
}

TEST_F(BoxOverflowModelTest, AddContentsVisualOverflowUnitesRects) {
  visual_overflow_.AddContentsVisualOverflow(PhysicalRect(0, 0, 10, 10));
  visual_overflow_.AddContentsVisualOverflow(PhysicalRect(80, 80, 10, 10));
  EXPECT_EQ(PhysicalRect(0, 0, 90, 90),
            visual_overflow_.ContentsVisualOverflowRect());
}

TEST_F(BoxOverflowModelTest, AddContentsVisualOverflowRectWithinRect) {
  visual_overflow_.AddContentsVisualOverflow(PhysicalRect(0, 0, 10, 10));
  visual_overflow_.AddContentsVisualOverflow(PhysicalRect(2, 2, 5, 5));
  EXPECT_EQ(PhysicalRect(0, 0, 10, 10),
            visual_overflow_.ContentsVisualOverflowRect());
}

TEST_F(BoxOverflowModelTest, AddContentsVisualOverflowEmpty) {
  visual_overflow_.AddContentsVisualOverflow(PhysicalRect(0, 0, 10, 10));
  visual_overflow_.AddContentsVisualOverflow(PhysicalRect(20, 20, 0, 0));
  EXPECT_EQ(PhysicalRect(0, 0, 10, 10),
            visual_overflow_.ContentsVisualOverflowRect());
}

TEST_F(BoxOverflowModelTest, MoveAffectsSelfVisualOverflow) {
  visual_overflow_.Move(LayoutUnit(500), LayoutUnit(100));
  EXPECT_EQ(PhysicalRect(500, 100, 100, 100),
            visual_overflow_.SelfVisualOverflowRect());
}

TEST_F(BoxOverflowModelTest, MoveAffectsContentsVisualOverflow) {
  visual_overflow_.AddContentsVisualOverflow(PhysicalRect(0, 0, 10, 10));
  visual_overflow_.Move(LayoutUnit(500), LayoutUnit(100));
  EXPECT_EQ(PhysicalRect(500, 100, 10, 10),
            visual_overflow_.ContentsVisualOverflowRect());
}

}  // anonymous namespace
}  // namespace blink