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#include <limits>
#include <gtest/gtest.h>
#include <QtDebug>
#include "util/math.h"
#include "util/denormalsarezero.h"
namespace {
class MathUtilTest : public testing::Test {
protected:
static const int MIN;
static const int MAX;
static const int VALUE_MIN;
static const int VALUE_MAX;
};
const int MathUtilTest::MIN = -10;
const int MathUtilTest::MAX = 10;
const int MathUtilTest::VALUE_MIN = 2 * MathUtilTest::MIN;
const int MathUtilTest::VALUE_MAX = 2 * MathUtilTest::MAX;
TEST_F(MathUtilTest, MathClampUnsafe) {
for (int i = VALUE_MIN; i <= VALUE_MAX; ++i) {
EXPECT_LE(MIN, math_clamp(i, MIN, MAX));
EXPECT_GE(MAX, math_clamp(i, MIN, MAX));
EXPECT_EQ(MIN, math_clamp(i, MIN, MIN));
EXPECT_EQ(MAX, math_clamp(i, MAX, MAX));
if (MIN >= i) {
EXPECT_EQ(MIN, math_clamp(i, MIN, MAX));
}
if (MAX <= i) {
EXPECT_EQ(MAX, math_clamp(i, MIN, MAX));
}
}
}
TEST_F(MathUtilTest, IsNaN) {
// Test floats can be recognized as nan.
EXPECT_FALSE(isnan(0.0f));
EXPECT_TRUE(isnan(std::numeric_limits<float>::quiet_NaN()));
// Test doubles can be recognized as nan.
EXPECT_FALSE(isnan(0.0));
EXPECT_TRUE(isnan(std::numeric_limits<double>::quiet_NaN()));
}
TEST_F(MathUtilTest, IsInf) {
// Test floats can be recognized as infinity.
EXPECT_FALSE(isinf(0.0f));
EXPECT_TRUE(isinf(std::numeric_limits<float>::infinity()));
// Test doubles can be recognized as infinity.
EXPECT_FALSE(isinf(0.0f));
EXPECT_TRUE(isinf(std::numeric_limits<double>::infinity()));
}
TEST_F(MathUtilTest, Denormal) {
#ifdef __SSE__
_MM_SET_DENORMALS_ZERO_MODE(_MM_DENORMALS_ZERO_OFF);
_MM_SET_FLUSH_ZERO_MODE(_MM_FLUSH_ZERO_OFF);
volatile float fDenormal = std::numeric_limits<float>::min() / 2.0f;
EXPECT_NE(0.0f, fDenormal);
volatile double dDenormal = std::numeric_limits<double>::min() / 2.0;
EXPECT_NE(0.0, dDenormal);
_MM_SET_DENORMALS_ZERO_MODE(_MM_DENORMALS_ZERO_ON);
_MM_SET_FLUSH_ZERO_MODE(_MM_FLUSH_ZERO_ON);
fDenormal = std::numeric_limits<float>::min() / 2.0f;
EXPECT_EQ(0.0f, fDenormal);
dDenormal = std::numeric_limits<double>::min() / 2.0;
EXPECT_EQ(0.0, dDenormal);
#endif
}
} // namespace
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