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//
// Test Suite for C-API GEOSBuffer and GEOSBufferWithStyle
#include <tut/tut.hpp>
// geos
#include <geos_c.h>
// std
#include "capi_test_utils.h"
namespace tut {
//
// Test Group
//
// Common data used in test cases.
struct test_capigeosbuffer_data : public capitest::utility
{
GEOSBufferParams* bp_;
double area_;
test_capigeosbuffer_data()
: bp_(nullptr)
{}
~test_capigeosbuffer_data()
{
GEOSBufferParams_destroy(bp_);
}
};
typedef test_group<test_capigeosbuffer_data> group;
typedef group::object object;
group test_capigeosbuffer_group("capi::GEOSBuffer");
//
// Test Cases
//
// Buffer against empty point
template<>
template<>
void object::test<1>()
{
geom1_ = fromWKT("POINT EMPTY");
geom2_ = GEOSBufferWithStyle(geom1_, 1, 8,
GEOSBUF_CAP_ROUND,
GEOSBUF_JOIN_BEVEL,
5.0);
ensure(nullptr != geom2_);
geom3_ = fromWKT("POLYGON EMPTY");
ensure_geometry_equals(geom2_, geom3_);
}
// Buffer against empty linestring
template<>
template<>
void object::test<2>()
{
geom1_ = fromWKT("LINESTRING EMPTY");
geom2_ = GEOSBufferWithStyle(geom1_, 1, 8,
GEOSBUF_CAP_ROUND,
GEOSBUF_JOIN_BEVEL,
5.0);
ensure(nullptr != geom2_);
geom3_ = fromWKT("POLYGON EMPTY");
ensure_geometry_equals(geom2_, geom3_);
}
// Buffer against empty polygon
template<>
template<>
void object::test<3>()
{
geom1_ = fromWKT("POLYGON EMPTY");
geom2_ = GEOSBufferWithStyle(geom1_, 1, 8,
GEOSBUF_CAP_ROUND,
GEOSBUF_JOIN_BEVEL,
5.0);
ensure(nullptr != geom2_);
geom3_ = fromWKT("POLYGON EMPTY");
ensure_geometry_equals(geom2_, geom3_);
}
// Simple Buffer on a 2-vertices line (quadSegs: 1)
template<>
template<>
void object::test<4>()
{
geom1_ = fromWKT("LINESTRING(5 10, 10 20)");
geom2_ = GEOSBuffer(geom1_, 5, 1);
ensure(nullptr != geom2_);
ensure_equals(GEOSGetNumCoordinates(geom2_), 7);
ensure(0 != GEOSArea(geom2_, &area_));
ensure_area(area_, 161.803, 0.001);
}
// Simple Buffer on a 2-vertices line (quadSegs: 2)
template<>
template<>
void object::test<5>()
{
geom1_ = fromWKT("LINESTRING(5 10, 10 20)");
geom2_ = GEOSBuffer(geom1_, 5, 2);
ensure(nullptr != geom2_);
ensure_equals(GEOSGetNumCoordinates(geom2_), 11);
ensure(0 != GEOSArea(geom2_, &area_));
ensure_area(area_, 182.514, 0.001);
}
// Buffer with square end caps on a 2-vertices line (no matter quadSegs)
template<>
template<>
void object::test<6>()
{
geom1_ = fromWKT("LINESTRING(5 10, 10 20)");
bp_ = GEOSBufferParams_create();
ensure_equals(GEOSBufferParams_setQuadrantSegments(bp_, 20), 1);
ensure_equals(GEOSBufferParams_setEndCapStyle(bp_, GEOSBUF_CAP_SQUARE), 1);
ensure_equals(GEOSBufferParams_setJoinStyle(bp_, GEOSBUF_JOIN_ROUND), 1);
ensure_equals(GEOSBufferParams_setMitreLimit(bp_, 5.0), 1);
geom2_ = GEOSBufferWithParams(geom1_, bp_, 5);
ensure(nullptr != geom2_);
ensure_equals(GEOSGetNumCoordinates(geom2_), 7);
ensure(0 != GEOSArea(geom2_, &area_));
ensure_area(area_, 211.803, 0.001);
}
// Buffer with flat end caps on a 2-vertices line (no matter quadSegs)
template<>
template<>
void object::test<7>()
{
geom1_ = fromWKT("LINESTRING(5 10, 10 20)");
geom2_ = GEOSBufferWithStyle(geom1_, 5, 20, GEOSBUF_CAP_FLAT,
GEOSBUF_JOIN_ROUND, 5.0);
ensure(nullptr != geom2_);
ensure_equals(GEOSGetNumCoordinates(geom2_), 5);
ensure(0 != GEOSArea(geom2_, &area_));
ensure_area(area_, 111.803, 0.001);
}
// Buffer with flat end cap on a 2-vertices horizontal line
template<>
template<>
void object::test<8>()
{
geom1_ = fromWKT("LINESTRING(5 10, 10 10)");
geom2_ = GEOSBufferWithStyle(geom1_, 5, 20, GEOSBUF_CAP_FLAT,
GEOSBUF_JOIN_ROUND, 5.0);
ensure(nullptr != geom2_);
ensure_equals(GEOSGetNumCoordinates(geom2_), 5);
ensure(0 != GEOSArea(geom2_, &area_));
ensure_area(area_, 50.0, 0.001);
geom3_ = fromWKT("POLYGON ((10.0 15.0, 10.0 5.0, 5.0 5.0, 5.0 15.0, 10.0 15.0))");
ensure_geometry_equals(geom2_, geom3_, 0.00001);
}
// Buffer with square end cap on a 2-vertices horizontal line
template<>
template<>
void object::test<9>()
{
geom1_ = fromWKT("LINESTRING(5 10, 10 10)");
geom2_ = GEOSBufferWithStyle(geom1_, 5, 20, GEOSBUF_CAP_SQUARE,
GEOSBUF_JOIN_ROUND, 5.0);
ensure(nullptr != geom2_);
ensure_equals(GEOSGetNumCoordinates(geom2_), 7);
ensure(0 != GEOSArea(geom2_, &area_));
ensure_area(area_, 150.0, 0.001);
geom3_ = fromWKT("POLYGON ((10.0 15.0, 15.0 15.0, 15.0 5.0, 5.0 5.0, 0.0 5.0, 0.0 15.0, 10.0 15.0))");
ensure_geometry_equals(geom2_, geom3_, 0.00001);
}
// Buffer with flat end cap and round join style
// on an L-shaped simple line
template<>
template<>
void object::test<10>()
{
geom1_ = fromWKT("LINESTRING(5 10, 10 10, 10 20)");
geom2_ = GEOSBufferWithStyle(geom1_, 5, 20, GEOSBUF_CAP_SQUARE,
GEOSBUF_JOIN_ROUND, 5.0);
ensure(nullptr != geom2_);
ensure_equals(GEOSGetNumCoordinates(geom2_), 29);
ensure(0 != GEOSArea(geom2_, &area_));
ensure_area(area_, 244.615, 0.001);
}
// Buffer with flat end cap and mitre join style
// on an L-shaped simple line
template<>
template<>
void object::test<11>()
{
geom1_ = fromWKT("LINESTRING(5 10, 10 10, 10 20)");
geom2_ = GEOSBufferWithStyle(geom1_, 5, 20, GEOSBUF_CAP_SQUARE,
GEOSBUF_JOIN_MITRE, 5.0);
ensure(nullptr != geom2_);
ensure_equals(GEOSGetNumCoordinates(geom2_), 9);
ensure(0 != GEOSArea(geom2_, &area_));
ensure_area(area_, 250.0, 0.001);
geom3_ = fromWKT("POLYGON ((5.0 15.0, 5.0 20.0, 5.0 25.0, 15.0 25.0, 15.0 5.0, 5.0 5.0, 0.0 5.0, 0.0 15.0, 5.0 15.0))");
ensure_geometry_equals(geom2_, geom3_, 0.00001);
}
// Buffer with flat end cap and bevel join style
// on an L-shaped simple line
template<>
template<>
void object::test<12>()
{
geom1_ = fromWKT("LINESTRING(5 10, 10 10, 10 20)");
geom2_ = GEOSBufferWithStyle(geom1_, 5, 20, GEOSBUF_CAP_SQUARE,
GEOSBUF_JOIN_BEVEL, 5.0);
ensure(nullptr != geom2_);
ensure_equals(GEOSGetNumCoordinates(geom2_), 10);
ensure(0 != GEOSArea(geom2_, &area_));
ensure_area(area_, 237.5, 0.001);
geom3_ = fromWKT("POLYGON ((5.0 15.0, 5.0 20.0, 5.0 25.0, 15.0 25.0, 15.0 10.0, 10.0 5.0, 5.0 5.0, 0.0 5.0, 0.0 15.0, 5.0 15.0))");
ensure_geometry_equals(geom2_, geom3_, 0.00001);
}
// Buffer with flat end cap and bevel join style
// on an L-shaped simple line with different quadSegs and mitreLimit
// (result unaffected)
template<>
template<>
void object::test<13>()
{
geom1_ = fromWKT("LINESTRING(5 10, 10 10, 10 20)");
geom2_ = GEOSBufferWithStyle(geom1_, 5, 200, GEOSBUF_CAP_SQUARE,
GEOSBUF_JOIN_BEVEL, 10.0);
ensure(nullptr != geom2_);
ensure_equals(GEOSGetNumCoordinates(geom2_), 10);
ensure(0 != GEOSArea(geom2_, &area_));
ensure_area(area_, 237.5, 0.001);
geom3_ = fromWKT("POLYGON ((5.0 15.0, 5.0 20.0, 5.0 25.0, 15.0 25.0, 15.0 10.0, 10.0 5.0, 5.0 5.0, 0.0 5.0, 0.0 15.0, 5.0 15.0))");
ensure_geometry_equals(geom2_, geom3_, 0.00001);
}
// Buffer with limited mitre (1)
template<>
template<>
void object::test<14>()
{
geom1_ = fromWKT("POLYGON((0 0, 10 0, 10 10, 0 0))");
geom2_ = GEOSBufferWithStyle(geom1_, 2, 200, GEOSBUF_CAP_FLAT,
GEOSBUF_JOIN_MITRE, 1);
ensure(nullptr != geom2_);
ensure_equals(GEOSGetNumCoordinates(geom2_), 7);
ensure(0 != GEOSArea(geom2_, &area_));
ensure_area(area_, 132.289, 0.001);
}
// Buffer with limited mitre (2)
template<>
template<>
void object::test<15>()
{
geom1_ = fromWKT("POLYGON((0 0, 10 0, 10 10, 0 0))");
geom2_ = GEOSBufferWithStyle(geom1_, 2, 200, GEOSBUF_CAP_FLAT,
GEOSBUF_JOIN_MITRE, 2);
ensure(nullptr != geom2_);
ensure_equals(GEOSGetNumCoordinates(geom2_), 6);
ensure(0 != GEOSArea(geom2_, &area_));
ensure_area(area_, 140.352, 0.001);
}
// Buffer with limited mitre (3)
template<>
template<>
void object::test<16>()
{
geom1_ = fromWKT("POLYGON((0 0, 10 0, 10 10, 0 0))");
geom2_ = GEOSBufferWithStyle(geom1_, 2, 200, GEOSBUF_CAP_FLAT,
GEOSBUF_JOIN_MITRE, 3);
ensure(nullptr != geom2_);
ensure_equals(GEOSGetNumCoordinates(geom2_), 4);
ensure(0 != GEOSArea(geom2_, &area_));
ensure_area(area_, 141.598, 0.001);
}
// Buffer with params:
// flat end cap on a straight line
template<>
template<>
void object::test<17>()
{
geom1_ = fromWKT("LINESTRING(5 10, 10 10)");
bp_ = GEOSBufferParams_create();
GEOSBufferParams_setEndCapStyle(bp_, GEOSBUF_CAP_SQUARE);
geom2_ = GEOSBufferWithParams(geom1_, bp_, 2);
ensure(nullptr != geom2_);
geom3_ = fromWKT("POLYGON ((10 12, 12 12, 12 8, 5 8, 3 8, 3 12, 10 12))");
ensure_geometry_equals(geom2_, geom3_, 0.00001);
}
// Buffer with params:
// flat end cap on a straight line
// Single sided (left)
template<>
template<>
void object::test<18>()
{
geom1_ = fromWKT("LINESTRING(5 10, 10 10)");
bp_ = GEOSBufferParams_create();
GEOSBufferParams_setEndCapStyle(bp_, GEOSBUF_CAP_SQUARE);
GEOSBufferParams_setSingleSided(bp_, 1);
geom2_ = GEOSBufferWithParams(geom1_, bp_, 2);
ensure(nullptr != geom2_);
geom3_ = fromWKT("POLYGON ((10 10, 5 10, 5 12, 10 12, 10 10))");
ensure_geometry_equals(geom2_, geom3_, 0.00001);
}
// Buffer with params:
// flat end cap on a straight line
// Single sided (right)
template<>
template<>
void object::test<19>()
{
geom1_ = fromWKT("LINESTRING(5 10, 10 10)");
bp_ = GEOSBufferParams_create();
GEOSBufferParams_setEndCapStyle(bp_, GEOSBUF_CAP_SQUARE);
GEOSBufferParams_setSingleSided(bp_, 1);
geom2_ = GEOSBufferWithParams(geom1_, bp_, -2);
ensure(nullptr != geom2_);
geom3_ = fromWKT("POLYGON ((5 10, 10 10, 10 8, 5 8, 5 10))");
ensure_geometry_equals(geom2_, geom3_, 0.00001);
}
// Single-sided buffer (3)
// http://trac.osgeo.org/geos/ticket/455
template<>
template<>
void object::test<20>()
{
geom1_ = fromWKT("LINESTRING(0 0, 10 0, 10 10)");
geom2_ = GEOSSingleSidedBuffer(geom1_, 10, 8, GEOSBUF_JOIN_BEVEL, 0, 0);
ensure(nullptr != geom2_);
geom3_ = fromWKT("LINESTRING (20.0 10.0, 20.0 0.0, 10.0 -10.0, 0.0 -10.0)");
ensure_geometry_equals(geom2_, geom3_, 0.00001);
}
/*
// Invalid result polygon with full precision, fall back on lower precision
// https://trac.osgeo.org/geos/ticket/1131
template<>
template<>
void object::test<21>()
{
geom1_ = fromWKT("POLYGON((-6503873.862740669 -3656747.43316935, -6481859.9985945 -3656747.43316935, -6481859.9985945 -3688545.2369360398, -6506319.8476458 -3688545.2369360398, -6506319.8476458 -3664085.38788474, -6501427.87783554 -3664085.38788474, -6501427.87783554 -3661639.40297961, -6498981.89293041 -3661639.40297961, -6498981.89293041 -3659193.41807448, -6503873.862740669 -3659193.41807448, -6503873.862740669 -3656747.43316935))");
ensure(nullptr != geom1_);
bp_ = GEOSBufferParams_create();
GEOSBufferParams_setQuadrantSegments(bp_, 1);
geom2_ = GEOSBufferWithParams(geom1_, bp_, 2445.98490513);
wkt_ = GEOSGeomToWKT(geom2_);
std::cout << wkt_ << "\n";
ensure(nullptr != geom2_);
ensure("Buffer result polygon is not valid", GEOSisValid(geom2_));
}
*/
// https://trac.osgeo.org/geos/ticket/590
template<>
template<>
void object::test<22>()
{
geom1_ = fromWKT("LINEARRING(38.7066196617741550 -28.8266827415760860, -48.9228243285119790 100.6496977731573000, 54.4799195800256510 129.8110447359351000, 108.8101748540030500 45.8263654831350490, 86.7372079193139310 22.3209346883718070, 71.8793256882949690 36.0080540867567290, 55.2741306329362700 34.2630391674088840, 52.0696193064635370 19.4304123529519610, 62.0890652576763390 -3.9267923737325212, 38.7066196617741550 -28.8266827415760860)");
geom2_ = GEOSBufferWithStyle(geom1_, 22.532378519833863, 6, GEOSBUF_CAP_FLAT, GEOSBUF_JOIN_MITRE, 5);
ensure(nullptr != geom2_);
ensure(GEOSisValid(geom2_));
}
// Error raised on invalid value of buffer params
template<>
template<>
void object::test<23>()
{
bp_ = GEOSBufferParams_create();
ensure_equals(GEOSBufferParams_setEndCapStyle(bp_, 500), 0);
ensure_equals(GEOSBufferParams_setJoinStyle(bp_, 500), 0);
}
// Segfault with Inf coords
// https://github.com/libgeos/geos/issues/822
template<>
template<>
void object::test<24>()
{
std::string wkb("0106000020E61000000100000001030000000100000005000000000000000000F07F000000000000F07F000000000000F07F000000000000F07F000000000000F07F000000000000F07F000000000000F07F000000000000F07F000000000000F07F000000000000F07F");
geom1_ = GEOSGeomFromHEX_buf(reinterpret_cast<const unsigned char*>(wkb.c_str()), wkb.size());
ensure(geom1_ != nullptr);
geom2_ = GEOSBuffer(geom1_, 20, 8);
ensure(geom2_ == nullptr);
geom3_ = GEOSBuffer(geom1_, -20, 8);
ensure(geom3_ == nullptr);
}
template<>
template<>
void object::test<25>()
{
geom1_ = fromWKT("POLYGON ((4.6664239253667485 4.9470840685113275, 4.666423925366749 4.947084068511328, 3.569508914897422 -10.739531408188364, -9.082056557097435 19.893317266250286, 5.639581102785941 18.86388007810711, 4.6664239253667485 4.9470840685113275))");
geom2_ = GEOSBufferWithStyle(geom1_, -1, 8,
GEOSBUF_CAP_ROUND,
GEOSBUF_JOIN_MITRE,
5);
geom3_ = fromWKT("POLYGON ((3.3225774291798533 0.0647708524944821, 3.3225774291798555 0.0647708524944812, 2.8688758567150883 -6.4234639154696263, -7.5416226086581215 18.7831577331451953, 4.5722605787819921 17.9360725015914078, 3.3225774291798533 0.0647708524944821))");
ensure_geometry_equals(geom3_, geom2_, 0.001);
}
template<>
template<>
void object::test<26>()
{
input_ = fromWKT("CIRCULARSTRING (0 0, 1 1, 2 0)");
ensure(input_ != nullptr);
result_ = GEOSBuffer(input_, 1, 8);
ensure(result_ == nullptr);
}
} // namespace tut
|
