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[core] Check for NaNs in mbgl::util::{min,max,clamp}

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Bruno de Oliveira Abinader
2016-03-10 19:49:09 +02:00
parent cfcccb94a1
commit ac70ada2d3
7 changed files with 74 additions and 26 deletions
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42
test/util/math.cpp Normal file
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#include "../fixtures/util.hpp"
#include <mbgl/util/constants.hpp>
#include <mbgl/util/math.hpp>
using namespace mbgl;
TEST(Math, MinMaxFloatingPoint) {
double minimumValue = std::numeric_limits<double>::min();
double lowestValue = std::numeric_limits<double>::lowest();
double maximumValue = std::numeric_limits<double>::max();
double quietNAN = std::numeric_limits<double>::quiet_NaN();
ASSERT_DOUBLE_EQ(lowestValue, util::min(minimumValue, lowestValue));
ASSERT_DOUBLE_EQ(lowestValue, util::min(double(NAN), lowestValue));
ASSERT_DOUBLE_EQ(lowestValue, util::min(quietNAN, lowestValue));
ASSERT_DOUBLE_EQ(0., util::min(2., 1., 0.));
ASSERT_DOUBLE_EQ(maximumValue, util::max(double(NAN), maximumValue));
ASSERT_DOUBLE_EQ(maximumValue, util::max(quietNAN, maximumValue));
ASSERT_DOUBLE_EQ(10., util::max(8., 9., 10.));
ASSERT_DOUBLE_EQ(0., util::clamp(0., quietNAN, quietNAN));
ASSERT_DOUBLE_EQ(0., util::clamp(0., lowestValue, maximumValue));
}
TEST(Math, MinMaxIntegral) {
int32_t minimumValue = std::numeric_limits<int32_t>::min();
int32_t lowestValue = std::numeric_limits<int32_t>::lowest();
int32_t maximumValue = std::numeric_limits<int32_t>::max();
int32_t quietNAN = std::numeric_limits<int32_t>::quiet_NaN();
ASSERT_EQ(lowestValue, util::min(minimumValue, lowestValue));
ASSERT_EQ(lowestValue, util::min(quietNAN, lowestValue));
ASSERT_EQ(0, util::min(2, 1, 0));
ASSERT_EQ(maximumValue, util::max(quietNAN, maximumValue));
ASSERT_EQ(10, util::max(8, 9, 10));
ASSERT_EQ(0, util::clamp(0, quietNAN, quietNAN));
ASSERT_EQ(0, util::clamp(0, lowestValue, maximumValue));
}