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#include <cppunit/TestAssert.h>
#include <cppunit/TestFixture.h>
#include <cppunit/extensions/HelperMacros.h>

#include <basegfx/range/b1drange.hxx>

namespace basegfx
{
class B1DRangeTest : public CppUnit::TestFixture
{
public:
    void checkIntervalAxioms()
    {
        // test interval axioms
        // (http://en.wikipedia.org/wiki/Interval_%28mathematics%29)
        B1DRange aRange;
        CPPUNIT_ASSERT_MESSAGE("default ctor - empty range", aRange.isEmpty());
        CPPUNIT_ASSERT_EQUAL_MESSAGE("center - get cop-out value since range is empty", 0.0,
                                     aRange.getCenter());

        // degenerate interval
        aRange.expand(1);
        CPPUNIT_ASSERT_EQUAL(B1DRange(1.0, 1.0), aRange);
        CPPUNIT_ASSERT_MESSAGE("degenerate range - still, not empty!", !aRange.isEmpty());
        CPPUNIT_ASSERT_EQUAL_MESSAGE("degenerate range - size of 0", 0.0, aRange.getRange());
        CPPUNIT_ASSERT_MESSAGE("same value as degenerate range - is inside range",
                               aRange.isInside(1.0));
        CPPUNIT_ASSERT_EQUAL_MESSAGE("center - must be the single range value", 1.0,
                                     aRange.getCenter());

        // proper interval
        aRange.expand(2.0);
        CPPUNIT_ASSERT_EQUAL(B1DRange(1.0, 2.0), aRange);
        CPPUNIT_ASSERT_EQUAL_MESSAGE("proper range - size of 1", 1.0, aRange.getRange());
        CPPUNIT_ASSERT_MESSAGE("smaller value of range - is inside *closed* range",
                               aRange.isInside(1));
        CPPUNIT_ASSERT_MESSAGE("larger value of range - is inside *closed* range",
                               aRange.isInside(2));

        // center for proper interval that works for ints, too
        aRange.expand(3.0);
        CPPUNIT_ASSERT_EQUAL(B1DRange(1.0, 3.0), aRange);
        CPPUNIT_ASSERT_EQUAL_MESSAGE("center - must be half of the range", 2.0, aRange.getCenter());
    }

    void checkOverlap()
    {
        B1DRange aRange(1.0, 3.0);
        B1DRange aRange2(0.0, 1.0);

        CPPUNIT_ASSERT_MESSAGE("range overlapping *includes* upper bound",
                               aRange.overlaps(aRange2));
        CPPUNIT_ASSERT_MESSAGE("range overlapping *includes* upper bound, but only barely",
                               !aRange.overlapsMore(aRange2));

        B1DRange aRange3(0.0, 2.0);
        CPPUNIT_ASSERT_MESSAGE("range overlapping is fully overlapping now",
                               aRange.overlapsMore(aRange3));
    }

    void checkIntersect()
    {
        B1DRange aRange(1.0, 3.0);
        B1DRange aRange2(3.0, 4.0);
        aRange.intersect(aRange2);
        CPPUNIT_ASSERT_MESSAGE("range intersection is yielding empty range!", !aRange.isEmpty());

        B1DRange aRange3(5.0, 6.0);
        aRange.intersect(aRange3);
        CPPUNIT_ASSERT_MESSAGE("range intersection is yielding nonempty range!", aRange.isEmpty());
    }

    CPPUNIT_TEST_SUITE(B1DRangeTest);
    CPPUNIT_TEST(checkIntervalAxioms);
    CPPUNIT_TEST(checkOverlap);
    CPPUNIT_TEST(checkIntersect);
    CPPUNIT_TEST_SUITE_END();
};

} // namespace basegfx

CPPUNIT_TEST_SUITE_REGISTRATION(basegfx::B1DRangeTest);

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