/**
 * \author Norihiro Watanabe
 * \date   2012-08-03
 *
 * \copyright
 * Copyright (c) 2012-2021, OpenGeoSys Community (http://www.opengeosys.org)
 *            Distributed under a Modified BSD License.
 *              See accompanying file LICENSE.txt or
 *              http://www.opengeosys.org/project/license
 */

#include <gtest/gtest.h>

#include "NumLib/TimeStepping/TimeStep.h"

TEST(NumLib, TimeStep)
{
    // initial
    NumLib::TimeStep t1(1.);
    ASSERT_EQ(1., t1.current());
    ASSERT_EQ(1., t1.previous());
    ASSERT_EQ(.0, t1.dt());
    ASSERT_EQ(0u, t1.steps());

    NumLib::TimeStep t2(0., 1., 1);
    ASSERT_EQ(1., t2.current());
    ASSERT_EQ(0., t2.previous());
    ASSERT_EQ(1., t2.dt());
    ASSERT_EQ(1u, t2.steps());

    // copy
    const NumLib::TimeStep& t3(t2);
    ASSERT_EQ(1., t3.current());
    ASSERT_EQ(0., t3.previous());
    ASSERT_EQ(1., t3.dt());
    ASSERT_EQ(1u, t3.steps());

    const NumLib::TimeStep& t4 = t2;
    ASSERT_EQ(1., t4.current());
    ASSERT_EQ(0., t4.previous());
    ASSERT_EQ(1., t4.dt());
    ASSERT_EQ(1u, t4.steps());

    // increment
    NumLib::TimeStep t5 = t2 + 2.;
    ASSERT_EQ(3., t5.current());
    ASSERT_EQ(1., t5.previous());
    ASSERT_EQ(2., t5.dt());
    ASSERT_EQ(2u, t5.steps());

    t5 += 3.;
    ASSERT_EQ(6., t5.current());
    ASSERT_EQ(3., t5.previous());
    ASSERT_EQ(3., t5.dt());
    ASSERT_EQ(3u, t5.steps());

    // comparison
    ASSERT_TRUE(t2 == t3);
    ASSERT_TRUE(t5 == 6.);
    ASSERT_TRUE(t2 < t5);
    ASSERT_TRUE(t5 < 7.);
}