mapnik/tests/cpp_tests/label_algo_test.cpp

#include <boost/detail/lightweight_test.hpp>
#include <iostream>
#include <mapnik/geometry.hpp>
#include <mapnik/geom_util.hpp>
#include <vector>
#include <algorithm>

int main(int argc, char** argv)
{
    std::vector<std::string> args;
    for (int i=1;i<argc;++i)
    {
        args.push_back(argv[i]);
    }
    bool quiet = std::find(args.begin(), args.end(), "-q")!=args.end();

    try
    {
        // reused these for simplicity
        double x,y;

        mapnik::geometry_type pt(mapnik::new_geometry::geometry_types::Point);
        // single point
        pt.move_to(10,10);
        {
            mapnik::vertex_adapter va(pt);
            BOOST_TEST( mapnik::label::centroid(va, x, y) );
            BOOST_TEST( x == 10 );
            BOOST_TEST( y == 10 );
        }
        // two points
        pt.move_to(20,20);
        {
            mapnik::vertex_adapter va(pt);
            BOOST_TEST( mapnik::label::centroid(va, x, y) );
            BOOST_TEST_EQ( x, 15 );
            BOOST_TEST_EQ( y, 15 );
        }
        // line with two verticies
        mapnik::geometry_type line(mapnik::new_geometry::geometry_types::LineString);
        line.move_to(0,0);
        line.line_to(50,50);
        mapnik::vertex_adapter va(line);
        BOOST_TEST( mapnik::label::centroid(va, x, y) );
        BOOST_TEST( x == 25 );
        BOOST_TEST( y == 25 );

        // TODO - centroid and interior should be equal but they appear not to be (check largest)
        // MULTIPOLYGON(((-52 40,-60 32,-68 40,-60 48,-52 40)),((-60 50,-80 30,-100 49.9999999999999,-80.0000000000001 70,-60 50)),((-52 60,-60 52,-68 60,-60 68,-52 60)))

        // hit tests
        {
            mapnik::geometry_type pt_hit(mapnik::new_geometry::geometry_types::Point);
            pt_hit.move_to(10,10);
            mapnik::vertex_adapter va(pt_hit);
            BOOST_TEST( mapnik::label::hit_test(va, 10, 10, 0.1) );
            BOOST_TEST( !mapnik::label::hit_test(va, 9, 9, 0) );
            BOOST_TEST( mapnik::label::hit_test(va, 9, 9, 1.5) );
        }
        {
            mapnik::geometry_type line_hit(mapnik::new_geometry::geometry_types::LineString);
            line_hit.move_to(0,0);
            line_hit.line_to(50,50);
            mapnik::vertex_adapter va(line_hit);
            BOOST_TEST( mapnik::label::hit_test(va, 0, 0, 0.001) );
            BOOST_TEST( !mapnik::label::hit_test(va, 1, 1, 0) );
            BOOST_TEST( mapnik::label::hit_test(va, 1, 1, 1.001) );
        }
    }
    catch (std::exception const & ex)
    {
        std::clog << ex.what() << "\n";
        BOOST_TEST(false);
    }

    if (!::boost::detail::test_errors()) {
        if (quiet) std::clog << "\x1b[1;32m.\x1b[0m";
        else std::clog << "C++ label algorithms: \x1b[1;32m✓ \x1b[0m\n";
        ::boost::detail::report_errors_remind().called_report_errors_function = true;
    } else {
        return ::boost::report_errors();
    }
}