#include "NoiseGenerator_Test.h"
CPPUNIT_TEST_SUITE_REGISTRATION(NoiseGenerator_Test);

#include "NoiseGenerator.h"

void NoiseGenerator_Test::test_noise_range()
{
    NoiseGenerator* noise;
    double minvalue, maxvalue;

    noise = new NoiseGenerator();

    noise->addLevelSimple(0.1, -1.0, 1.0);
    noise->addLevelSimple(0.2, -0.5, 0.2);
    noise->addLevelSimple(0.4, -0.3, 1.2);
    noise->validate();
    noise->getRange(&minvalue, &maxvalue);

    ck_assert_double_eq(minvalue, -1.8);
    ck_assert_double_eq(maxvalue, 2.4);

    delete noise;
}

void NoiseGenerator_Test::test_noise_normalize()
{
    int x;
    NoiseGenerator* noise;

    noise = new NoiseGenerator();

    /* Symmetric case */
    noise->addLevelsSimple( 10, 1.0, -4.0, 4.0, 0.5);
    noise->validate();
    noise->normalizeAmplitude( -1.0, 1.0, 0);
    for (x = 0; x < 1000; x++)
    {
        double value = noise->get1DTotal( 0.01 * (double)x);
        ck_assert_double_in_range(value, -1.0, 1.0);
    }

    /* Target center differs from current center */
    noise->clearLevels();
    noise->addLevelsSimple( 10, 1.0, -5.0, 5.0, 0.5);
    noise->validate();
    noise->normalizeAmplitude( 0.0, 1.0, 0);
    for (x = 0; x < 1000; x++)
    {
        double value = noise->get1DTotal(0.01 * (double)x);
        ck_assert_double_in_range(value, 0.0, 1.0);
    }

    /* Asymmetric range */
    noise->clearLevels();
    noise->addLevelsSimple(10, 1.0, 0.0, 10.0, 0.0);
    noise->validate();
    noise->normalizeAmplitude(0.0, 1.0, 0);
    for (x = 0; x < 1000; x++)
    {
        double value = noise->get1DTotal(0.01 * (double)x);
        ck_assert_double_in_range(value, 0.0, 1.0);
    }

    /* Complex asymmetric case */
    noise->clearLevels();
    noise->addLevelsSimple(3, 1.0, -2.0, 8.0, 0.3);
    noise->validate();
    noise->normalizeAmplitude(-2.0, 4.0, 0.0);
    for (x = 0; x < 1000; x++)
    {
        double value = noise->get1DTotal(0.01 * (double)x);
        ck_assert_double_in_range(value, -2.0, 4.0);
    }

    delete noise;
}