blob: 4a3813740ca1cf79f77f8f80c6be11f36456071d [file] [log] [blame]
/*
* Copyright (c) 2012, Google Inc. All rights reserved.
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* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
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*
* * Redistributions of source code must retain the above copyright
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* * 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
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*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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#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(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