src/base/temperature.test.cc

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#include <gtest/gtest.h>

#include <sstream>

#include "base/temperature.hh"

TEST(TemperatureTest, Constructor)
{
    Temperature temp;
    EXPECT_EQ(temp, Temperature(0.0));
}

TEST(TemperatureTest, Conversion)
{
    Temperature freezing(273.15);

    EXPECT_EQ(Temperature::fromKelvin(42.0), Temperature(42.0));
    EXPECT_EQ(Temperature::fromCelsius(0.0), freezing);
    EXPECT_EQ(Temperature::fromFahrenheit(32.0), freezing);

    EXPECT_EQ(freezing.toKelvin(), 273.15);
    EXPECT_EQ(freezing.toCelsius(), 0.0);
    EXPECT_EQ(Temperature(0).toFahrenheit(), -459.67);
}

TEST(TemperatureTest, Comparison)
{
    EXPECT_TRUE(Temperature(2.0) < Temperature(3.0));
    EXPECT_FALSE(Temperature(2.0) < Temperature(2.0));
    EXPECT_FALSE(Temperature(2.0) < Temperature(1.0));

    EXPECT_FALSE(Temperature(2.0) > Temperature(3.0));
    EXPECT_FALSE(Temperature(2.0) > Temperature(2.0));
    EXPECT_TRUE(Temperature(2.0) > Temperature(1.0));

    EXPECT_TRUE(Temperature(2.0) <= Temperature(3.0));
    EXPECT_TRUE(Temperature(2.0) <= Temperature(2.0));
    EXPECT_FALSE(Temperature(2.0) <= Temperature(1.0));

    EXPECT_FALSE(Temperature(2.0) >= Temperature(3.0));
    EXPECT_TRUE(Temperature(2.0) >= Temperature(2.0));
    EXPECT_TRUE(Temperature(2.0) >= Temperature(1.0));

    EXPECT_TRUE(Temperature(2.0) == Temperature(2.0));
    EXPECT_FALSE(Temperature(2.0) == Temperature(3.0));

    EXPECT_FALSE(Temperature(2.0) != Temperature(2.0));
    EXPECT_TRUE(Temperature(2.0) != Temperature(3.0));
}

TEST(TemperatureTest, BinaryOperators)
{
    EXPECT_EQ(Temperature(2.0) + Temperature(1.0), Temperature(3.0));
    EXPECT_EQ(Temperature(2.0) - Temperature(1.0), Temperature(1.0));

    EXPECT_EQ(Temperature(8.0) * 2.0, Temperature(16.0));
    EXPECT_EQ(2.0 * Temperature(8.0), Temperature(16.0));
    EXPECT_EQ(Temperature(8.0) / 2.0, Temperature(4.0));
}

TEST(TemperatureTest, AssignmentOperators)
{
    Temperature temp1(0);
    temp1 += Temperature(1.0);
    EXPECT_EQ(temp1, Temperature(1.0));

    Temperature temp2(1.0);
    temp2 -= Temperature(1.0);
    EXPECT_EQ(temp2, Temperature(0.0));

    Temperature temp3(32.0);
    temp3 *= 2.0;
    EXPECT_EQ(temp3, Temperature(64.0));

    Temperature temp4(32.0);
    temp4 /= 2.0;
    EXPECT_EQ(temp4, Temperature(16.0));
}

TEST(TemperatureTest, OutStream)
{
    Temperature temp(42);
    std::ostringstream ss;
    ss << "T: " << temp << std::endl;
    EXPECT_EQ("T: 42K\n", ss.str());
}