third_party/blink/renderer/platform/geometry/layout_unit_test.cc - chromium/src - Git at Google

 /*
  * Copyright (c) 2012, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
  * copyright notice, this list of conditions and the following disclaimer
  * in the documentation and/or other materials provided with the
  * distribution.
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

 #include "third_party/blink/renderer/platform/geometry/layout_unit.h"

 #include <limits.h>
 #include "testing/gtest/include/gtest/gtest.h"

 namespace blink {

 TEST(LayoutUnitTest, LayoutUnitInt) {
   EXPECT_EQ(kIntMinForLayoutUnit, LayoutUnit(INT_MIN).ToInt());
   EXPECT_EQ(kIntMinForLayoutUnit, LayoutUnit(INT_MIN / 2).ToInt());
   EXPECT_EQ(kIntMinForLayoutUnit, LayoutUnit(kIntMinForLayoutUnit - 1).ToInt());
   EXPECT_EQ(kIntMinForLayoutUnit, LayoutUnit(kIntMinForLayoutUnit).ToInt());
   EXPECT_EQ(kIntMinForLayoutUnit + 1,
             LayoutUnit(kIntMinForLayoutUnit + 1).ToInt());
   EXPECT_EQ(kIntMinForLayoutUnit / 2,
             LayoutUnit(kIntMinForLayoutUnit / 2).ToInt());
   EXPECT_EQ(-10000, LayoutUnit(-10000).ToInt());
   EXPECT_EQ(-1000, LayoutUnit(-1000).ToInt());
   EXPECT_EQ(-100, LayoutUnit(-100).ToInt());
   EXPECT_EQ(-10, LayoutUnit(-10).ToInt());
   EXPECT_EQ(-1, LayoutUnit(-1).ToInt());
   EXPECT_EQ(0, LayoutUnit(0).ToInt());
   EXPECT_EQ(1, LayoutUnit(1).ToInt());
   EXPECT_EQ(100, LayoutUnit(100).ToInt());
   EXPECT_EQ(1000, LayoutUnit(1000).ToInt());
   EXPECT_EQ(10000, LayoutUnit(10000).ToInt());
   EXPECT_EQ(kIntMaxForLayoutUnit / 2,
             LayoutUnit(kIntMaxForLayoutUnit / 2).ToInt());
   EXPECT_EQ(kIntMaxForLayoutUnit - 1,
             LayoutUnit(kIntMaxForLayoutUnit - 1).ToInt());
   EXPECT_EQ(kIntMaxForLayoutUnit, LayoutUnit(kIntMaxForLayoutUnit).ToInt());
   EXPECT_EQ(kIntMaxForLayoutUnit, LayoutUnit(kIntMaxForLayoutUnit + 1).ToInt());
   EXPECT_EQ(kIntMaxForLayoutUnit, LayoutUnit(INT_MAX / 2).ToInt());
   EXPECT_EQ(kIntMaxForLayoutUnit, LayoutUnit(INT_MAX).ToInt());

   // Test the raw unsaturated value
   EXPECT_EQ(0, LayoutUnit(0).RawValue());
   // Internally the max number we can represent (without saturating)
   // is all the (non-sign) bits set except for the bottom n fraction bits
   const int max_internal_representation =
       std::numeric_limits<int>::max() ^ ((1 << kLayoutUnitFractionalBits) - 1);
   EXPECT_EQ(max_internal_representation,
             LayoutUnit(kIntMaxForLayoutUnit).RawValue());
   EXPECT_EQ(GetMaxSaturatedSetResultForTesting(),
             LayoutUnit(kIntMaxForLayoutUnit + 100).RawValue());
   EXPECT_EQ((kIntMaxForLayoutUnit - 100) << kLayoutUnitFractionalBits,
             LayoutUnit(kIntMaxForLayoutUnit - 100).RawValue());
   EXPECT_EQ(GetMinSaturatedSetResultForTesting(),
             LayoutUnit(kIntMinForLayoutUnit).RawValue());
   EXPECT_EQ(GetMinSaturatedSetResultForTesting(),
             LayoutUnit(kIntMinForLayoutUnit - 100).RawValue());
   // Shifting negative numbers left has undefined behavior, so use
   // multiplication instead of direct shifting here.
   EXPECT_EQ((kIntMinForLayoutUnit + 100) * (1 << kLayoutUnitFractionalBits),
             LayoutUnit(kIntMinForLayoutUnit + 100).RawValue());
 }

 TEST(LayoutUnitTest, LayoutUnitUnsigned) {
   // Test the raw unsaturated value
   EXPECT_EQ(0, LayoutUnit((unsigned)0).RawValue());
   EXPECT_EQ(GetMaxSaturatedSetResultForTesting(),
             LayoutUnit((unsigned)kIntMaxForLayoutUnit).RawValue());
   const unsigned kOverflowed = kIntMaxForLayoutUnit + 100;
   EXPECT_EQ(GetMaxSaturatedSetResultForTesting(),
             LayoutUnit(kOverflowed).RawValue());
   const unsigned kNotOverflowed = kIntMaxForLayoutUnit - 100;
   EXPECT_EQ((kIntMaxForLayoutUnit - 100) << kLayoutUnitFractionalBits,
             LayoutUnit(kNotOverflowed).RawValue());
 }

 TEST(LayoutUnitTest, LayoutUnitFloat) {
   const float kTolerance = 1.0f / kFixedPointDenominator;
   EXPECT_FLOAT_EQ(1.0f, LayoutUnit(1.0f).ToFloat());
   EXPECT_FLOAT_EQ(1.25f, LayoutUnit(1.25f).ToFloat());
   EXPECT_NEAR(LayoutUnit(1.1f).ToFloat(), 1.1f, kTolerance);
   EXPECT_NEAR(LayoutUnit(1.33f).ToFloat(), 1.33f, kTolerance);
   EXPECT_NEAR(LayoutUnit(1.3333f).ToFloat(), 1.3333f, kTolerance);
   EXPECT_NEAR(LayoutUnit(1.53434f).ToFloat(), 1.53434f, kTolerance);
   EXPECT_NEAR(LayoutUnit(345634).ToFloat(), 345634.0f, kTolerance);
   EXPECT_NEAR(LayoutUnit(345634.12335f).ToFloat(), 345634.12335f, kTolerance);
   EXPECT_NEAR(LayoutUnit(-345634.12335f).ToFloat(), -345634.12335f, kTolerance);
   EXPECT_NEAR(LayoutUnit(-345634).ToFloat(), -345634.0f, kTolerance);
 }

 TEST(LayoutUnitTest, LayoutUnitRounding) {
   EXPECT_EQ(-2, LayoutUnit(-1.9f).Round());
   EXPECT_EQ(-2, LayoutUnit(-1.6f).Round());
   EXPECT_EQ(-2, LayoutUnit::FromFloatRound(-1.51f).Round());
   EXPECT_EQ(-1, LayoutUnit::FromFloatRound(-1.5f).Round());
   EXPECT_EQ(-1, LayoutUnit::FromFloatRound(-1.49f).Round());
   EXPECT_EQ(-1, LayoutUnit(-1.0f).Round());
   EXPECT_EQ(-1, LayoutUnit::FromFloatRound(-0.99f).Round());
   EXPECT_EQ(-1, LayoutUnit::FromFloatRound(-0.51f).Round());
   EXPECT_EQ(0, LayoutUnit::FromFloatRound(-0.50f).Round());
   EXPECT_EQ(0, LayoutUnit::FromFloatRound(-0.49f).Round());
   EXPECT_EQ(0, LayoutUnit(-0.1f).Round());
   EXPECT_EQ(0, LayoutUnit(0.0f).Round());
   EXPECT_EQ(0, LayoutUnit(0.1f).Round());
   EXPECT_EQ(0, LayoutUnit::FromFloatRound(0.49f).Round());
   EXPECT_EQ(1, LayoutUnit::FromFloatRound(0.50f).Round());
   EXPECT_EQ(1, LayoutUnit::FromFloatRound(0.51f).Round());
   EXPECT_EQ(1, LayoutUnit(0.99f).Round());
   EXPECT_EQ(1, LayoutUnit(1.0f).Round());
   EXPECT_EQ(1, LayoutUnit::FromFloatRound(1.49f).Round());
   EXPECT_EQ(2, LayoutUnit::FromFloatRound(1.5f).Round());
   EXPECT_EQ(2, LayoutUnit::FromFloatRound(1.51f).Round());
   // The fractional part of LayoutUnit::Max() is 0x3f, so it should round up.
   EXPECT_EQ(((std::numeric_limits<int>::max() / kFixedPointDenominator) + 1),
             LayoutUnit::Max().Round());
   // The fractional part of LayoutUnit::Min() is 0, so the next bigger possible
   // value should round down.
   LayoutUnit epsilon;
   epsilon.SetRawValue(1);
   EXPECT_EQ(((std::numeric_limits<int>::min() / kFixedPointDenominator)),
             (LayoutUnit::Min() + epsilon).Round());
 }

 TEST(LayoutUnitTest, LayoutUnitSnapSizeToPixel) {
   EXPECT_EQ(1, SnapSizeToPixel(LayoutUnit(1), LayoutUnit(0)));
   EXPECT_EQ(1, SnapSizeToPixel(LayoutUnit(1), LayoutUnit(0.5)));
   EXPECT_EQ(2, SnapSizeToPixel(LayoutUnit(1.5), LayoutUnit(0)));
   EXPECT_EQ(2, SnapSizeToPixel(LayoutUnit(1.5), LayoutUnit(0.49)));
   EXPECT_EQ(1, SnapSizeToPixel(LayoutUnit(1.5), LayoutUnit(0.5)));
   EXPECT_EQ(1, SnapSizeToPixel(LayoutUnit(1.5), LayoutUnit(0.75)));
   EXPECT_EQ(1, SnapSizeToPixel(LayoutUnit(1.5), LayoutUnit(0.99)));
   EXPECT_EQ(2, SnapSizeToPixel(LayoutUnit(1.5), LayoutUnit(1)));

   EXPECT_EQ(0, SnapSizeToPixel(LayoutUnit(0.5), LayoutUnit(1.5)));
   EXPECT_EQ(0, SnapSizeToPixel(LayoutUnit(0.99), LayoutUnit(1.5)));
   EXPECT_EQ(1, SnapSizeToPixel(LayoutUnit(1.0), LayoutUnit(1.5)));
   EXPECT_EQ(1, SnapSizeToPixel(LayoutUnit(1.49), LayoutUnit(1.5)));
   EXPECT_EQ(1, SnapSizeToPixel(LayoutUnit(1.5), LayoutUnit(1.5)));

   EXPECT_EQ(101, SnapSizeToPixel(LayoutUnit(100.5), LayoutUnit(100)));
   EXPECT_EQ(kIntMaxForLayoutUnit,
             SnapSizeToPixel(LayoutUnit(kIntMaxForLayoutUnit), LayoutUnit(0.3)));
   EXPECT_EQ(
       kIntMinForLayoutUnit,
       SnapSizeToPixel(LayoutUnit(kIntMinForLayoutUnit), LayoutUnit(-0.3)));
 }

 TEST(LayoutUnitTest, LayoutUnitMultiplication) {
   EXPECT_EQ(1, (LayoutUnit(1) * LayoutUnit(1)).ToInt());
   EXPECT_EQ(2, (LayoutUnit(1) * LayoutUnit(2)).ToInt());
   EXPECT_EQ(2, (LayoutUnit(2) * LayoutUnit(1)).ToInt());
   EXPECT_EQ(1, (LayoutUnit(2) * LayoutUnit(0.5)).ToInt());
   EXPECT_EQ(1, (LayoutUnit(0.5) * LayoutUnit(2)).ToInt());
   EXPECT_EQ(100, (LayoutUnit(100) * LayoutUnit(1)).ToInt());

   EXPECT_EQ(-1, (LayoutUnit(-1) * LayoutUnit(1)).ToInt());
   EXPECT_EQ(-2, (LayoutUnit(-1) * LayoutUnit(2)).ToInt());
   EXPECT_EQ(-2, (LayoutUnit(-2) * LayoutUnit(1)).ToInt());
   EXPECT_EQ(-1, (LayoutUnit(-2) * LayoutUnit(0.5)).ToInt());
   EXPECT_EQ(-1, (LayoutUnit(-0.5) * LayoutUnit(2)).ToInt());
   EXPECT_EQ(-100, (LayoutUnit(-100) * LayoutUnit(1)).ToInt());

   EXPECT_EQ(1, (LayoutUnit(-1) * LayoutUnit(-1)).ToInt());
   EXPECT_EQ(2, (LayoutUnit(-1) * LayoutUnit(-2)).ToInt());
   EXPECT_EQ(2, (LayoutUnit(-2) * LayoutUnit(-1)).ToInt());
   EXPECT_EQ(1, (LayoutUnit(-2) * LayoutUnit(-0.5)).ToInt());
   EXPECT_EQ(1, (LayoutUnit(-0.5) * LayoutUnit(-2)).ToInt());
   EXPECT_EQ(100, (LayoutUnit(-100) * LayoutUnit(-1)).ToInt());

   EXPECT_EQ(333, (LayoutUnit(100) * LayoutUnit(3.33)).Round());
   EXPECT_EQ(-333, (LayoutUnit(-100) * LayoutUnit(3.33)).Round());
   EXPECT_EQ(333, (LayoutUnit(-100) * LayoutUnit(-3.33)).Round());

   size_t a_hundred_size_t = 100;
   EXPECT_EQ(100, (LayoutUnit(a_hundred_size_t) * LayoutUnit(1)).ToInt());
   EXPECT_EQ(400, (a_hundred_size_t * LayoutUnit(4)).ToInt());
   EXPECT_EQ(400, (LayoutUnit(4) * a_hundred_size_t).ToInt());

   int quarter_max = kIntMaxForLayoutUnit / 4;
   EXPECT_EQ(quarter_max * 2, (LayoutUnit(quarter_max) * LayoutUnit(2)).ToInt());
   EXPECT_EQ(quarter_max * 3, (LayoutUnit(quarter_max) * LayoutUnit(3)).ToInt());
   EXPECT_EQ(quarter_max * 4, (LayoutUnit(quarter_max) * LayoutUnit(4)).ToInt());
   EXPECT_EQ(kIntMaxForLayoutUnit,
             (LayoutUnit(quarter_max) * LayoutUnit(5)).ToInt());

   size_t overflow_int_size_t = kIntMaxForLayoutUnit * 4;
   EXPECT_EQ(kIntMaxForLayoutUnit,
             (LayoutUnit(overflow_int_size_t) * LayoutUnit(2)).ToInt());
   EXPECT_EQ(kIntMaxForLayoutUnit,
             (overflow_int_size_t * LayoutUnit(4)).ToInt());
   EXPECT_EQ(kIntMaxForLayoutUnit,
             (LayoutUnit(4) * overflow_int_size_t).ToInt());
 }

 TEST(LayoutUnitTest, LayoutUnitDivision) {
   EXPECT_EQ(1, (LayoutUnit(1) / LayoutUnit(1)).ToInt());
   EXPECT_EQ(0, (LayoutUnit(1) / LayoutUnit(2)).ToInt());
   EXPECT_EQ(2, (LayoutUnit(2) / LayoutUnit(1)).ToInt());
   EXPECT_EQ(4, (LayoutUnit(2) / LayoutUnit(0.5)).ToInt());
   EXPECT_EQ(0, (LayoutUnit(0.5) / LayoutUnit(2)).ToInt());
   EXPECT_EQ(10, (LayoutUnit(100) / LayoutUnit(10)).ToInt());
   EXPECT_FLOAT_EQ(0.5f, (LayoutUnit(1) / LayoutUnit(2)).ToFloat());
   EXPECT_FLOAT_EQ(0.25f, (LayoutUnit(0.5) / LayoutUnit(2)).ToFloat());

   EXPECT_EQ(-1, (LayoutUnit(-1) / LayoutUnit(1)).ToInt());
   EXPECT_EQ(0, (LayoutUnit(-1) / LayoutUnit(2)).ToInt());
   EXPECT_EQ(-2, (LayoutUnit(-2) / LayoutUnit(1)).ToInt());
   EXPECT_EQ(-4, (LayoutUnit(-2) / LayoutUnit(0.5)).ToInt());
   EXPECT_EQ(0, (LayoutUnit(-0.5) / LayoutUnit(2)).ToInt());
   EXPECT_EQ(-10, (LayoutUnit(-100) / LayoutUnit(10)).ToInt());
   EXPECT_FLOAT_EQ(-0.5f, (LayoutUnit(-1) / LayoutUnit(2)).ToFloat());
   EXPECT_FLOAT_EQ(-0.25f, (LayoutUnit(-0.5) / LayoutUnit(2)).ToFloat());

   EXPECT_EQ(1, (LayoutUnit(-1) / LayoutUnit(-1)).ToInt());
   EXPECT_EQ(0, (LayoutUnit(-1) / LayoutUnit(-2)).ToInt());
   EXPECT_EQ(2, (LayoutUnit(-2) / LayoutUnit(-1)).ToInt());
   EXPECT_EQ(4, (LayoutUnit(-2) / LayoutUnit(-0.5)).ToInt());
   EXPECT_EQ(0, (LayoutUnit(-0.5) / LayoutUnit(-2)).ToInt());
   EXPECT_EQ(10, (LayoutUnit(-100) / LayoutUnit(-10)).ToInt());
   EXPECT_FLOAT_EQ(0.5f, (LayoutUnit(-1) / LayoutUnit(-2)).ToFloat());
   EXPECT_FLOAT_EQ(0.25f, (LayoutUnit(-0.5) / LayoutUnit(-2)).ToFloat());

   size_t a_hundred_size_t = 100;
   EXPECT_EQ(50, (LayoutUnit(a_hundred_size_t) / LayoutUnit(2)).ToInt());
   EXPECT_EQ(25, (a_hundred_size_t / LayoutUnit(4)).ToInt());
   EXPECT_EQ(4, (LayoutUnit(400) / a_hundred_size_t).ToInt());

   EXPECT_EQ(kIntMaxForLayoutUnit / 2,
             (LayoutUnit(kIntMaxForLayoutUnit) / LayoutUnit(2)).ToInt());
   EXPECT_EQ(kIntMaxForLayoutUnit,
             (LayoutUnit(kIntMaxForLayoutUnit) / LayoutUnit(0.5)).ToInt());
 }

 TEST(LayoutUnitTest, LayoutUnitCeil) {
   EXPECT_EQ(0, LayoutUnit(0).Ceil());
   EXPECT_EQ(1, LayoutUnit(0.1).Ceil());
   EXPECT_EQ(1, LayoutUnit(0.5).Ceil());
   EXPECT_EQ(1, LayoutUnit(0.9).Ceil());
   EXPECT_EQ(1, LayoutUnit(1.0).Ceil());
   EXPECT_EQ(2, LayoutUnit(1.1).Ceil());

   EXPECT_EQ(0, LayoutUnit(-0.1).Ceil());
   EXPECT_EQ(0, LayoutUnit(-0.5).Ceil());
   EXPECT_EQ(0, LayoutUnit(-0.9).Ceil());
   EXPECT_EQ(-1, LayoutUnit(-1.0).Ceil());

   EXPECT_EQ(kIntMaxForLayoutUnit, LayoutUnit(kIntMaxForLayoutUnit).Ceil());
   EXPECT_EQ(kIntMaxForLayoutUnit,
             (LayoutUnit(kIntMaxForLayoutUnit) - LayoutUnit(0.5)).Ceil());
   EXPECT_EQ(kIntMaxForLayoutUnit - 1,
             (LayoutUnit(kIntMaxForLayoutUnit) - LayoutUnit(1)).Ceil());

   EXPECT_EQ(kIntMinForLayoutUnit, LayoutUnit(kIntMinForLayoutUnit).Ceil());
 }

 TEST(LayoutUnitTest, LayoutUnitFloor) {
   EXPECT_EQ(0, LayoutUnit(0).Floor());
   EXPECT_EQ(0, LayoutUnit(0.1).Floor());
   EXPECT_EQ(0, LayoutUnit(0.5).Floor());
   EXPECT_EQ(0, LayoutUnit(0.9).Floor());
   EXPECT_EQ(1, LayoutUnit(1.0).Floor());
   EXPECT_EQ(1, LayoutUnit(1.1).Floor());

   EXPECT_EQ(-1, LayoutUnit(-0.1).Floor());
   EXPECT_EQ(-1, LayoutUnit(-0.5).Floor());
   EXPECT_EQ(-1, LayoutUnit(-0.9).Floor());
   EXPECT_EQ(-1, LayoutUnit(-1.0).Floor());

   EXPECT_EQ(kIntMaxForLayoutUnit, LayoutUnit(kIntMaxForLayoutUnit).Floor());

   EXPECT_EQ(kIntMinForLayoutUnit, LayoutUnit(kIntMinForLayoutUnit).Floor());
   EXPECT_EQ(kIntMinForLayoutUnit,
             (LayoutUnit(kIntMinForLayoutUnit) + LayoutUnit(0.5)).Floor());
   EXPECT_EQ(kIntMinForLayoutUnit + 1,
             (LayoutUnit(kIntMinForLayoutUnit) + LayoutUnit(1)).Floor());
 }

 TEST(LayoutUnitTest, LayoutUnitFloatOverflow) {
   // These should overflow to the max/min according to their sign.
   EXPECT_EQ(kIntMaxForLayoutUnit, LayoutUnit(176972000.0f).ToInt());
   EXPECT_EQ(kIntMinForLayoutUnit, LayoutUnit(-176972000.0f).ToInt());
   EXPECT_EQ(kIntMaxForLayoutUnit, LayoutUnit(176972000.0).ToInt());
   EXPECT_EQ(kIntMinForLayoutUnit, LayoutUnit(-176972000.0).ToInt());
 }

 TEST(LayoutUnitTest, UnaryMinus) {
   EXPECT_EQ(LayoutUnit(), -LayoutUnit());
   EXPECT_EQ(LayoutUnit(999), -LayoutUnit(-999));
   EXPECT_EQ(LayoutUnit(-999), -LayoutUnit(999));

   LayoutUnit negative_max;
   negative_max.SetRawValue(LayoutUnit::Min().RawValue() + 1);
   EXPECT_EQ(negative_max, -LayoutUnit::Max());
   EXPECT_EQ(LayoutUnit::Max(), -negative_max);

   // -LayoutUnit::min() is saturated to LayoutUnit::max()
   EXPECT_EQ(LayoutUnit::Max(), -LayoutUnit::Min());
 }

 TEST(LayoutUnitTest, LayoutUnitPlusPlus) {
   EXPECT_EQ(LayoutUnit(-1), LayoutUnit(-2)++);
   EXPECT_EQ(LayoutUnit(0), LayoutUnit(-1)++);
   EXPECT_EQ(LayoutUnit(1), LayoutUnit(0)++);
   EXPECT_EQ(LayoutUnit(2), LayoutUnit(1)++);
   EXPECT_EQ(LayoutUnit::Max(), LayoutUnit(LayoutUnit::Max())++);
 }

 TEST(LayoutUnitTest, IntMod) {
   EXPECT_EQ(LayoutUnit(5), IntMod(LayoutUnit(55), LayoutUnit(10)));
   EXPECT_EQ(LayoutUnit(5), IntMod(LayoutUnit(55), LayoutUnit(-10)));
   EXPECT_EQ(LayoutUnit(-5), IntMod(LayoutUnit(-55), LayoutUnit(10)));
   EXPECT_EQ(LayoutUnit(-5), IntMod(LayoutUnit(-55), LayoutUnit(-10)));
   EXPECT_EQ(LayoutUnit(1.5), IntMod(LayoutUnit(7.5), LayoutUnit(3)));
   EXPECT_EQ(LayoutUnit(1.25), IntMod(LayoutUnit(7.5), LayoutUnit(3.125)));
   EXPECT_EQ(LayoutUnit(), IntMod(LayoutUnit(7.5), LayoutUnit(2.5)));
   EXPECT_EQ(LayoutUnit(), IntMod(LayoutUnit(), LayoutUnit(123)));
 }

 TEST(LayoutUnitTest, LayoutMod) {
 #define CHECK_LAYOUT_MOD(a, b) EXPECT_EQ(a, (a / b) * b + LayoutMod(a, b))
   CHECK_LAYOUT_MOD(LayoutUnit(55), LayoutUnit(10));
   CHECK_LAYOUT_MOD(LayoutUnit(1234), LayoutUnit(789));
   CHECK_LAYOUT_MOD(LayoutUnit::Max(), LayoutUnit::Max());
   CHECK_LAYOUT_MOD(LayoutUnit::Max(), LayoutUnit::Min());
   CHECK_LAYOUT_MOD(LayoutUnit::Min(), LayoutUnit::Max());
   CHECK_LAYOUT_MOD(LayoutUnit::Min(), LayoutUnit::Min());

   EXPECT_EQ(LayoutUnit(), LayoutMod(LayoutUnit(123), 2));
   EXPECT_EQ(LayoutUnit(LayoutUnit::Epsilon()),
             LayoutMod(LayoutUnit(123 + LayoutUnit::Epsilon()), 2));
 }

 TEST(LayoutUnitTest, Fraction) {
   EXPECT_TRUE(LayoutUnit(-1.9f).HasFraction());
   EXPECT_TRUE(LayoutUnit(-1.6f).HasFraction());
   EXPECT_TRUE(LayoutUnit::FromFloatRound(-1.51f).HasFraction());
   EXPECT_TRUE(LayoutUnit::FromFloatRound(-1.5f).HasFraction());
   EXPECT_TRUE(LayoutUnit::FromFloatRound(-1.49f).HasFraction());
   EXPECT_FALSE(LayoutUnit(-1.0f).HasFraction());
   EXPECT_TRUE(LayoutUnit::FromFloatRound(-0.95f).HasFraction());
   EXPECT_TRUE(LayoutUnit::FromFloatRound(-0.51f).HasFraction());
   EXPECT_TRUE(LayoutUnit::FromFloatRound(-0.50f).HasFraction());
   EXPECT_TRUE(LayoutUnit::FromFloatRound(-0.49f).HasFraction());
   EXPECT_TRUE(LayoutUnit(-0.1f).HasFraction());
   EXPECT_FALSE(LayoutUnit(-1.0f).HasFraction());
   EXPECT_FALSE(LayoutUnit(0.0f).HasFraction());
   EXPECT_TRUE(LayoutUnit(0.1f).HasFraction());
   EXPECT_TRUE(LayoutUnit::FromFloatRound(0.49f).HasFraction());
   EXPECT_TRUE(LayoutUnit::FromFloatRound(0.50f).HasFraction());
   EXPECT_TRUE(LayoutUnit::FromFloatRound(0.51f).HasFraction());
   EXPECT_TRUE(LayoutUnit(0.95f).HasFraction());
   EXPECT_FALSE(LayoutUnit(1.0f).HasFraction());
 }

 }  // namespace blink
	/*
	* Copyright (c) 2012, Google Inc. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions are
	* met:
	*
	* * Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* * Redistributions in binary form must reproduce the above
	* copyright notice, this list of conditions and the following disclaimer
	* in the documentation and/or other materials provided with the
	* distribution.
	* * Neither the name of Google Inc. nor the names of its
	* contributors may be used to endorse or promote products derived from
	* this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#include "third_party/blink/renderer/platform/geometry/layout_unit.h"

	#include <limits.h>
	#include "testing/gtest/include/gtest/gtest.h"

	namespace blink {

	TEST(LayoutUnitTest, LayoutUnitInt) {
	EXPECT_EQ(kIntMinForLayoutUnit, LayoutUnit(INT_MIN).ToInt());
	EXPECT_EQ(kIntMinForLayoutUnit, LayoutUnit(INT_MIN / 2).ToInt());
	EXPECT_EQ(kIntMinForLayoutUnit, LayoutUnit(kIntMinForLayoutUnit - 1).ToInt());
	EXPECT_EQ(kIntMinForLayoutUnit, LayoutUnit(kIntMinForLayoutUnit).ToInt());
	EXPECT_EQ(kIntMinForLayoutUnit + 1,
	LayoutUnit(kIntMinForLayoutUnit + 1).ToInt());
	EXPECT_EQ(kIntMinForLayoutUnit / 2,
	LayoutUnit(kIntMinForLayoutUnit / 2).ToInt());
	EXPECT_EQ(-10000, LayoutUnit(-10000).ToInt());
	EXPECT_EQ(-1000, LayoutUnit(-1000).ToInt());
	EXPECT_EQ(-100, LayoutUnit(-100).ToInt());
	EXPECT_EQ(-10, LayoutUnit(-10).ToInt());
	EXPECT_EQ(-1, LayoutUnit(-1).ToInt());
	EXPECT_EQ(0, LayoutUnit(0).ToInt());
	EXPECT_EQ(1, LayoutUnit(1).ToInt());
	EXPECT_EQ(100, LayoutUnit(100).ToInt());
	EXPECT_EQ(1000, LayoutUnit(1000).ToInt());
	EXPECT_EQ(10000, LayoutUnit(10000).ToInt());
	EXPECT_EQ(kIntMaxForLayoutUnit / 2,
	LayoutUnit(kIntMaxForLayoutUnit / 2).ToInt());
	EXPECT_EQ(kIntMaxForLayoutUnit - 1,
	LayoutUnit(kIntMaxForLayoutUnit - 1).ToInt());
	EXPECT_EQ(kIntMaxForLayoutUnit, LayoutUnit(kIntMaxForLayoutUnit).ToInt());
	EXPECT_EQ(kIntMaxForLayoutUnit, LayoutUnit(kIntMaxForLayoutUnit + 1).ToInt());
	EXPECT_EQ(kIntMaxForLayoutUnit, LayoutUnit(INT_MAX / 2).ToInt());
	EXPECT_EQ(kIntMaxForLayoutUnit, LayoutUnit(INT_MAX).ToInt());

	// Test the raw unsaturated value
	EXPECT_EQ(0, LayoutUnit(0).RawValue());
	// Internally the max number we can represent (without saturating)
	// is all the (non-sign) bits set except for the bottom n fraction bits
	const int max_internal_representation =
	std::numeric_limits<int>::max() ^ ((1 << kLayoutUnitFractionalBits) - 1);
	EXPECT_EQ(max_internal_representation,
	LayoutUnit(kIntMaxForLayoutUnit).RawValue());
	EXPECT_EQ(GetMaxSaturatedSetResultForTesting(),
	LayoutUnit(kIntMaxForLayoutUnit + 100).RawValue());
	EXPECT_EQ((kIntMaxForLayoutUnit - 100) << kLayoutUnitFractionalBits,
	LayoutUnit(kIntMaxForLayoutUnit - 100).RawValue());
	EXPECT_EQ(GetMinSaturatedSetResultForTesting(),
	LayoutUnit(kIntMinForLayoutUnit).RawValue());
	EXPECT_EQ(GetMinSaturatedSetResultForTesting(),
	LayoutUnit(kIntMinForLayoutUnit - 100).RawValue());
	// Shifting negative numbers left has undefined behavior, so use
	// multiplication instead of direct shifting here.
	EXPECT_EQ((kIntMinForLayoutUnit + 100) * (1 << kLayoutUnitFractionalBits),
	LayoutUnit(kIntMinForLayoutUnit + 100).RawValue());
	}

	TEST(LayoutUnitTest, LayoutUnitUnsigned) {
	// Test the raw unsaturated value
	EXPECT_EQ(0, LayoutUnit((unsigned)0).RawValue());
	EXPECT_EQ(GetMaxSaturatedSetResultForTesting(),
	LayoutUnit((unsigned)kIntMaxForLayoutUnit).RawValue());
	const unsigned kOverflowed = kIntMaxForLayoutUnit + 100;
	EXPECT_EQ(GetMaxSaturatedSetResultForTesting(),
	LayoutUnit(kOverflowed).RawValue());
	const unsigned kNotOverflowed = kIntMaxForLayoutUnit - 100;
	EXPECT_EQ((kIntMaxForLayoutUnit - 100) << kLayoutUnitFractionalBits,
	LayoutUnit(kNotOverflowed).RawValue());
	}

	TEST(LayoutUnitTest, LayoutUnitFloat) {
	const float kTolerance = 1.0f / kFixedPointDenominator;
	EXPECT_FLOAT_EQ(1.0f, LayoutUnit(1.0f).ToFloat());
	EXPECT_FLOAT_EQ(1.25f, LayoutUnit(1.25f).ToFloat());
	EXPECT_NEAR(LayoutUnit(1.1f).ToFloat(), 1.1f, kTolerance);
	EXPECT_NEAR(LayoutUnit(1.33f).ToFloat(), 1.33f, kTolerance);
	EXPECT_NEAR(LayoutUnit(1.3333f).ToFloat(), 1.3333f, kTolerance);
	EXPECT_NEAR(LayoutUnit(1.53434f).ToFloat(), 1.53434f, kTolerance);
	EXPECT_NEAR(LayoutUnit(345634).ToFloat(), 345634.0f, kTolerance);
	EXPECT_NEAR(LayoutUnit(345634.12335f).ToFloat(), 345634.12335f, kTolerance);
	EXPECT_NEAR(LayoutUnit(-345634.12335f).ToFloat(), -345634.12335f, kTolerance);
	EXPECT_NEAR(LayoutUnit(-345634).ToFloat(), -345634.0f, kTolerance);
	}

	TEST(LayoutUnitTest, LayoutUnitRounding) {
	EXPECT_EQ(-2, LayoutUnit(-1.9f).Round());
	EXPECT_EQ(-2, LayoutUnit(-1.6f).Round());
	EXPECT_EQ(-2, LayoutUnit::FromFloatRound(-1.51f).Round());
	EXPECT_EQ(-1, LayoutUnit::FromFloatRound(-1.5f).Round());
	EXPECT_EQ(-1, LayoutUnit::FromFloatRound(-1.49f).Round());
	EXPECT_EQ(-1, LayoutUnit(-1.0f).Round());
	EXPECT_EQ(-1, LayoutUnit::FromFloatRound(-0.99f).Round());
	EXPECT_EQ(-1, LayoutUnit::FromFloatRound(-0.51f).Round());
	EXPECT_EQ(0, LayoutUnit::FromFloatRound(-0.50f).Round());
	EXPECT_EQ(0, LayoutUnit::FromFloatRound(-0.49f).Round());
	EXPECT_EQ(0, LayoutUnit(-0.1f).Round());
	EXPECT_EQ(0, LayoutUnit(0.0f).Round());
	EXPECT_EQ(0, LayoutUnit(0.1f).Round());
	EXPECT_EQ(0, LayoutUnit::FromFloatRound(0.49f).Round());
	EXPECT_EQ(1, LayoutUnit::FromFloatRound(0.50f).Round());
	EXPECT_EQ(1, LayoutUnit::FromFloatRound(0.51f).Round());
	EXPECT_EQ(1, LayoutUnit(0.99f).Round());
	EXPECT_EQ(1, LayoutUnit(1.0f).Round());
	EXPECT_EQ(1, LayoutUnit::FromFloatRound(1.49f).Round());
	EXPECT_EQ(2, LayoutUnit::FromFloatRound(1.5f).Round());
	EXPECT_EQ(2, LayoutUnit::FromFloatRound(1.51f).Round());
	// The fractional part of LayoutUnit::Max() is 0x3f, so it should round up.
	EXPECT_EQ(((std::numeric_limits<int>::max() / kFixedPointDenominator) + 1),
	LayoutUnit::Max().Round());
	// The fractional part of LayoutUnit::Min() is 0, so the next bigger possible
	// value should round down.
	LayoutUnit epsilon;
	epsilon.SetRawValue(1);
	EXPECT_EQ(((std::numeric_limits<int>::min() / kFixedPointDenominator)),
	(LayoutUnit::Min() + epsilon).Round());
	}

	TEST(LayoutUnitTest, LayoutUnitSnapSizeToPixel) {
	EXPECT_EQ(1, SnapSizeToPixel(LayoutUnit(1), LayoutUnit(0)));
	EXPECT_EQ(1, SnapSizeToPixel(LayoutUnit(1), LayoutUnit(0.5)));
	EXPECT_EQ(2, SnapSizeToPixel(LayoutUnit(1.5), LayoutUnit(0)));
	EXPECT_EQ(2, SnapSizeToPixel(LayoutUnit(1.5), LayoutUnit(0.49)));
	EXPECT_EQ(1, SnapSizeToPixel(LayoutUnit(1.5), LayoutUnit(0.5)));
	EXPECT_EQ(1, SnapSizeToPixel(LayoutUnit(1.5), LayoutUnit(0.75)));
	EXPECT_EQ(1, SnapSizeToPixel(LayoutUnit(1.5), LayoutUnit(0.99)));
	EXPECT_EQ(2, SnapSizeToPixel(LayoutUnit(1.5), LayoutUnit(1)));

	EXPECT_EQ(0, SnapSizeToPixel(LayoutUnit(0.5), LayoutUnit(1.5)));
	EXPECT_EQ(0, SnapSizeToPixel(LayoutUnit(0.99), LayoutUnit(1.5)));
	EXPECT_EQ(1, SnapSizeToPixel(LayoutUnit(1.0), LayoutUnit(1.5)));
	EXPECT_EQ(1, SnapSizeToPixel(LayoutUnit(1.49), LayoutUnit(1.5)));
	EXPECT_EQ(1, SnapSizeToPixel(LayoutUnit(1.5), LayoutUnit(1.5)));

	EXPECT_EQ(101, SnapSizeToPixel(LayoutUnit(100.5), LayoutUnit(100)));
	EXPECT_EQ(kIntMaxForLayoutUnit,
	SnapSizeToPixel(LayoutUnit(kIntMaxForLayoutUnit), LayoutUnit(0.3)));
	EXPECT_EQ(
	kIntMinForLayoutUnit,
	SnapSizeToPixel(LayoutUnit(kIntMinForLayoutUnit), LayoutUnit(-0.3)));
	}

	TEST(LayoutUnitTest, LayoutUnitMultiplication) {
	EXPECT_EQ(1, (LayoutUnit(1) * LayoutUnit(1)).ToInt());
	EXPECT_EQ(2, (LayoutUnit(1) * LayoutUnit(2)).ToInt());
	EXPECT_EQ(2, (LayoutUnit(2) * LayoutUnit(1)).ToInt());
	EXPECT_EQ(1, (LayoutUnit(2) * LayoutUnit(0.5)).ToInt());
	EXPECT_EQ(1, (LayoutUnit(0.5) * LayoutUnit(2)).ToInt());
	EXPECT_EQ(100, (LayoutUnit(100) * LayoutUnit(1)).ToInt());

	EXPECT_EQ(-1, (LayoutUnit(-1) * LayoutUnit(1)).ToInt());
	EXPECT_EQ(-2, (LayoutUnit(-1) * LayoutUnit(2)).ToInt());
	EXPECT_EQ(-2, (LayoutUnit(-2) * LayoutUnit(1)).ToInt());
	EXPECT_EQ(-1, (LayoutUnit(-2) * LayoutUnit(0.5)).ToInt());
	EXPECT_EQ(-1, (LayoutUnit(-0.5) * LayoutUnit(2)).ToInt());
	EXPECT_EQ(-100, (LayoutUnit(-100) * LayoutUnit(1)).ToInt());

	EXPECT_EQ(1, (LayoutUnit(-1) * LayoutUnit(-1)).ToInt());
	EXPECT_EQ(2, (LayoutUnit(-1) * LayoutUnit(-2)).ToInt());
	EXPECT_EQ(2, (LayoutUnit(-2) * LayoutUnit(-1)).ToInt());
	EXPECT_EQ(1, (LayoutUnit(-2) * LayoutUnit(-0.5)).ToInt());
	EXPECT_EQ(1, (LayoutUnit(-0.5) * LayoutUnit(-2)).ToInt());
	EXPECT_EQ(100, (LayoutUnit(-100) * LayoutUnit(-1)).ToInt());

	EXPECT_EQ(333, (LayoutUnit(100) * LayoutUnit(3.33)).Round());
	EXPECT_EQ(-333, (LayoutUnit(-100) * LayoutUnit(3.33)).Round());
	EXPECT_EQ(333, (LayoutUnit(-100) * LayoutUnit(-3.33)).Round());

	size_t a_hundred_size_t = 100;
	EXPECT_EQ(100, (LayoutUnit(a_hundred_size_t) * LayoutUnit(1)).ToInt());
	EXPECT_EQ(400, (a_hundred_size_t * LayoutUnit(4)).ToInt());
	EXPECT_EQ(400, (LayoutUnit(4) * a_hundred_size_t).ToInt());

	int quarter_max = kIntMaxForLayoutUnit / 4;
	EXPECT_EQ(quarter_max * 2, (LayoutUnit(quarter_max) * LayoutUnit(2)).ToInt());
	EXPECT_EQ(quarter_max * 3, (LayoutUnit(quarter_max) * LayoutUnit(3)).ToInt());
	EXPECT_EQ(quarter_max * 4, (LayoutUnit(quarter_max) * LayoutUnit(4)).ToInt());
	EXPECT_EQ(kIntMaxForLayoutUnit,
	(LayoutUnit(quarter_max) * LayoutUnit(5)).ToInt());

	size_t overflow_int_size_t = kIntMaxForLayoutUnit * 4;
	EXPECT_EQ(kIntMaxForLayoutUnit,
	(LayoutUnit(overflow_int_size_t) * LayoutUnit(2)).ToInt());
	EXPECT_EQ(kIntMaxForLayoutUnit,
	(overflow_int_size_t * LayoutUnit(4)).ToInt());
	EXPECT_EQ(kIntMaxForLayoutUnit,
	(LayoutUnit(4) * overflow_int_size_t).ToInt());
	}

	TEST(LayoutUnitTest, LayoutUnitDivision) {
	EXPECT_EQ(1, (LayoutUnit(1) / LayoutUnit(1)).ToInt());
	EXPECT_EQ(0, (LayoutUnit(1) / LayoutUnit(2)).ToInt());
	EXPECT_EQ(2, (LayoutUnit(2) / LayoutUnit(1)).ToInt());
	EXPECT_EQ(4, (LayoutUnit(2) / LayoutUnit(0.5)).ToInt());
	EXPECT_EQ(0, (LayoutUnit(0.5) / LayoutUnit(2)).ToInt());
	EXPECT_EQ(10, (LayoutUnit(100) / LayoutUnit(10)).ToInt());
	EXPECT_FLOAT_EQ(0.5f, (LayoutUnit(1) / LayoutUnit(2)).ToFloat());
	EXPECT_FLOAT_EQ(0.25f, (LayoutUnit(0.5) / LayoutUnit(2)).ToFloat());

	EXPECT_EQ(-1, (LayoutUnit(-1) / LayoutUnit(1)).ToInt());
	EXPECT_EQ(0, (LayoutUnit(-1) / LayoutUnit(2)).ToInt());
	EXPECT_EQ(-2, (LayoutUnit(-2) / LayoutUnit(1)).ToInt());
	EXPECT_EQ(-4, (LayoutUnit(-2) / LayoutUnit(0.5)).ToInt());
	EXPECT_EQ(0, (LayoutUnit(-0.5) / LayoutUnit(2)).ToInt());
	EXPECT_EQ(-10, (LayoutUnit(-100) / LayoutUnit(10)).ToInt());
	EXPECT_FLOAT_EQ(-0.5f, (LayoutUnit(-1) / LayoutUnit(2)).ToFloat());
	EXPECT_FLOAT_EQ(-0.25f, (LayoutUnit(-0.5) / LayoutUnit(2)).ToFloat());

	EXPECT_EQ(1, (LayoutUnit(-1) / LayoutUnit(-1)).ToInt());
	EXPECT_EQ(0, (LayoutUnit(-1) / LayoutUnit(-2)).ToInt());
	EXPECT_EQ(2, (LayoutUnit(-2) / LayoutUnit(-1)).ToInt());
	EXPECT_EQ(4, (LayoutUnit(-2) / LayoutUnit(-0.5)).ToInt());
	EXPECT_EQ(0, (LayoutUnit(-0.5) / LayoutUnit(-2)).ToInt());
	EXPECT_EQ(10, (LayoutUnit(-100) / LayoutUnit(-10)).ToInt());
	EXPECT_FLOAT_EQ(0.5f, (LayoutUnit(-1) / LayoutUnit(-2)).ToFloat());
	EXPECT_FLOAT_EQ(0.25f, (LayoutUnit(-0.5) / LayoutUnit(-2)).ToFloat());

	size_t a_hundred_size_t = 100;
	EXPECT_EQ(50, (LayoutUnit(a_hundred_size_t) / LayoutUnit(2)).ToInt());
	EXPECT_EQ(25, (a_hundred_size_t / LayoutUnit(4)).ToInt());
	EXPECT_EQ(4, (LayoutUnit(400) / a_hundred_size_t).ToInt());

	EXPECT_EQ(kIntMaxForLayoutUnit / 2,
	(LayoutUnit(kIntMaxForLayoutUnit) / LayoutUnit(2)).ToInt());
	EXPECT_EQ(kIntMaxForLayoutUnit,
	(LayoutUnit(kIntMaxForLayoutUnit) / LayoutUnit(0.5)).ToInt());
	}

	TEST(LayoutUnitTest, LayoutUnitCeil) {
	EXPECT_EQ(0, LayoutUnit(0).Ceil());
	EXPECT_EQ(1, LayoutUnit(0.1).Ceil());
	EXPECT_EQ(1, LayoutUnit(0.5).Ceil());
	EXPECT_EQ(1, LayoutUnit(0.9).Ceil());
	EXPECT_EQ(1, LayoutUnit(1.0).Ceil());
	EXPECT_EQ(2, LayoutUnit(1.1).Ceil());

	EXPECT_EQ(0, LayoutUnit(-0.1).Ceil());
	EXPECT_EQ(0, LayoutUnit(-0.5).Ceil());
	EXPECT_EQ(0, LayoutUnit(-0.9).Ceil());
	EXPECT_EQ(-1, LayoutUnit(-1.0).Ceil());

	EXPECT_EQ(kIntMaxForLayoutUnit, LayoutUnit(kIntMaxForLayoutUnit).Ceil());
	EXPECT_EQ(kIntMaxForLayoutUnit,
	(LayoutUnit(kIntMaxForLayoutUnit) - LayoutUnit(0.5)).Ceil());
	EXPECT_EQ(kIntMaxForLayoutUnit - 1,
	(LayoutUnit(kIntMaxForLayoutUnit) - LayoutUnit(1)).Ceil());

	EXPECT_EQ(kIntMinForLayoutUnit, LayoutUnit(kIntMinForLayoutUnit).Ceil());
	}

	TEST(LayoutUnitTest, LayoutUnitFloor) {
	EXPECT_EQ(0, LayoutUnit(0).Floor());
	EXPECT_EQ(0, LayoutUnit(0.1).Floor());
	EXPECT_EQ(0, LayoutUnit(0.5).Floor());
	EXPECT_EQ(0, LayoutUnit(0.9).Floor());
	EXPECT_EQ(1, LayoutUnit(1.0).Floor());
	EXPECT_EQ(1, LayoutUnit(1.1).Floor());

	EXPECT_EQ(-1, LayoutUnit(-0.1).Floor());
	EXPECT_EQ(-1, LayoutUnit(-0.5).Floor());
	EXPECT_EQ(-1, LayoutUnit(-0.9).Floor());
	EXPECT_EQ(-1, LayoutUnit(-1.0).Floor());

	EXPECT_EQ(kIntMaxForLayoutUnit, LayoutUnit(kIntMaxForLayoutUnit).Floor());

	EXPECT_EQ(kIntMinForLayoutUnit, LayoutUnit(kIntMinForLayoutUnit).Floor());
	EXPECT_EQ(kIntMinForLayoutUnit,
	(LayoutUnit(kIntMinForLayoutUnit) + LayoutUnit(0.5)).Floor());
	EXPECT_EQ(kIntMinForLayoutUnit + 1,
	(LayoutUnit(kIntMinForLayoutUnit) + LayoutUnit(1)).Floor());
	}

	TEST(LayoutUnitTest, LayoutUnitFloatOverflow) {
	// These should overflow to the max/min according to their sign.
	EXPECT_EQ(kIntMaxForLayoutUnit, LayoutUnit(176972000.0f).ToInt());
	EXPECT_EQ(kIntMinForLayoutUnit, LayoutUnit(-176972000.0f).ToInt());
	EXPECT_EQ(kIntMaxForLayoutUnit, LayoutUnit(176972000.0).ToInt());
	EXPECT_EQ(kIntMinForLayoutUnit, LayoutUnit(-176972000.0).ToInt());
	}

	TEST(LayoutUnitTest, UnaryMinus) {
	EXPECT_EQ(LayoutUnit(), -LayoutUnit());
	EXPECT_EQ(LayoutUnit(999), -LayoutUnit(-999));
	EXPECT_EQ(LayoutUnit(-999), -LayoutUnit(999));

	LayoutUnit negative_max;
	negative_max.SetRawValue(LayoutUnit::Min().RawValue() + 1);
	EXPECT_EQ(negative_max, -LayoutUnit::Max());
	EXPECT_EQ(LayoutUnit::Max(), -negative_max);

	// -LayoutUnit::min() is saturated to LayoutUnit::max()
	EXPECT_EQ(LayoutUnit::Max(), -LayoutUnit::Min());
	}

	TEST(LayoutUnitTest, LayoutUnitPlusPlus) {
	EXPECT_EQ(LayoutUnit(-1), LayoutUnit(-2)++);
	EXPECT_EQ(LayoutUnit(0), LayoutUnit(-1)++);
	EXPECT_EQ(LayoutUnit(1), LayoutUnit(0)++);
	EXPECT_EQ(LayoutUnit(2), LayoutUnit(1)++);
	EXPECT_EQ(LayoutUnit::Max(), LayoutUnit(LayoutUnit::Max())++);
	}

	TEST(LayoutUnitTest, IntMod) {
	EXPECT_EQ(LayoutUnit(5), IntMod(LayoutUnit(55), LayoutUnit(10)));
	EXPECT_EQ(LayoutUnit(5), IntMod(LayoutUnit(55), LayoutUnit(-10)));
	EXPECT_EQ(LayoutUnit(-5), IntMod(LayoutUnit(-55), LayoutUnit(10)));
	EXPECT_EQ(LayoutUnit(-5), IntMod(LayoutUnit(-55), LayoutUnit(-10)));
	EXPECT_EQ(LayoutUnit(1.5), IntMod(LayoutUnit(7.5), LayoutUnit(3)));
	EXPECT_EQ(LayoutUnit(1.25), IntMod(LayoutUnit(7.5), LayoutUnit(3.125)));
	EXPECT_EQ(LayoutUnit(), IntMod(LayoutUnit(7.5), LayoutUnit(2.5)));
	EXPECT_EQ(LayoutUnit(), IntMod(LayoutUnit(), LayoutUnit(123)));
	}

	TEST(LayoutUnitTest, LayoutMod) {
	#define CHECK_LAYOUT_MOD(a, b) EXPECT_EQ(a, (a / b) * b + LayoutMod(a, b))
	CHECK_LAYOUT_MOD(LayoutUnit(55), LayoutUnit(10));
	CHECK_LAYOUT_MOD(LayoutUnit(1234), LayoutUnit(789));
	CHECK_LAYOUT_MOD(LayoutUnit::Max(), LayoutUnit::Max());
	CHECK_LAYOUT_MOD(LayoutUnit::Max(), LayoutUnit::Min());
	CHECK_LAYOUT_MOD(LayoutUnit::Min(), LayoutUnit::Max());
	CHECK_LAYOUT_MOD(LayoutUnit::Min(), LayoutUnit::Min());

	EXPECT_EQ(LayoutUnit(), LayoutMod(LayoutUnit(123), 2));
	EXPECT_EQ(LayoutUnit(LayoutUnit::Epsilon()),
	LayoutMod(LayoutUnit(123 + LayoutUnit::Epsilon()), 2));
	}

	TEST(LayoutUnitTest, Fraction) {
	EXPECT_TRUE(LayoutUnit(-1.9f).HasFraction());
	EXPECT_TRUE(LayoutUnit(-1.6f).HasFraction());
	EXPECT_TRUE(LayoutUnit::FromFloatRound(-1.51f).HasFraction());
	EXPECT_TRUE(LayoutUnit::FromFloatRound(-1.5f).HasFraction());
	EXPECT_TRUE(LayoutUnit::FromFloatRound(-1.49f).HasFraction());
	EXPECT_FALSE(LayoutUnit(-1.0f).HasFraction());
	EXPECT_TRUE(LayoutUnit::FromFloatRound(-0.95f).HasFraction());
	EXPECT_TRUE(LayoutUnit::FromFloatRound(-0.51f).HasFraction());
	EXPECT_TRUE(LayoutUnit::FromFloatRound(-0.50f).HasFraction());
	EXPECT_TRUE(LayoutUnit::FromFloatRound(-0.49f).HasFraction());
	EXPECT_TRUE(LayoutUnit(-0.1f).HasFraction());
	EXPECT_FALSE(LayoutUnit(-1.0f).HasFraction());
	EXPECT_FALSE(LayoutUnit(0.0f).HasFraction());
	EXPECT_TRUE(LayoutUnit(0.1f).HasFraction());
	EXPECT_TRUE(LayoutUnit::FromFloatRound(0.49f).HasFraction());
	EXPECT_TRUE(LayoutUnit::FromFloatRound(0.50f).HasFraction());
	EXPECT_TRUE(LayoutUnit::FromFloatRound(0.51f).HasFraction());
	EXPECT_TRUE(LayoutUnit(0.95f).HasFraction());
	EXPECT_FALSE(LayoutUnit(1.0f).HasFraction());
	}

	} // namespace blink