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//
// Test Suite for C-API GEOSDensify
#include <tut/tut.hpp>
// geos
#include <geos_c.h>
#include "capi_test_utils.h"
namespace tut {
//
// Test Group
//
struct test_capigeosdensify_data : public capitest::utility
{
void testDensify(
const std::string &wkt_input,
const std::string &wkt_output,
double tolerance)
{
int srid = 3857;
input_ = fromWKT(wkt_input.c_str());
GEOSSetSRID(input_, srid);
expected_ = fromWKT(wkt_output.c_str());
result_ = GEOSDensify(input_, tolerance);
ensure("result not NULL", result_ != nullptr);
ensure_geometry_equals_identical(result_, expected_);
ensure_equals("result SRID == expected SRID", GEOSGetSRID(result_), srid);
}
};
typedef test_group<test_capigeosdensify_data> group;
typedef group::object object;
group test_capigeosdensify_group("capi::GEOSDensify");
//
// Test Cases
//
// Densify with a tolerance greater than or equal to length of all edges.
// Result should match inputs.
template <>
template <>
void object::test<1>()
{
testDensify(
"POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0), (1 1, 1 2, 2 2, 2 1, 1 1))",
"POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0), (1 1, 1 2, 2 2, 2 1, 1 1))",
10.0
);
}
// Densify with a tolerance that evenly subdivides all outer and inner edges.
template <>
template <>
void object::test<2>()
{
testDensify(
"POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0), (1 1, 1 7, 7 7, 7 1, 1 1))",
"POLYGON ((0 0, 5 0, 10 0, 10 5, 10 10, 5 10, 0 10, 0 5, 0 0), (1 1, 1 4, 1 7, 4 7, 7 7, 7 4, 7 1, 4 1, 1 1))",
5.0
);
}
// Densify a LINESTRING
template <>
template <>
void object::test<3>()
{
testDensify(
"LINESTRING (0 0, 0 6 )",
"LINESTRING (0 0, 0 3, 0 6)",
3.0
);
}
// Ensure that tolerance results in the right number of subdivisions
// ceil(6 / 2.9999999) = 3 new segments; 2 new vertices
template <>
template <>
void object::test<4>()
{
testDensify(
"LINESTRING (0 0, 0 6 )",
"LINESTRING (0 0, 0 2, 0 4, 0 6)",
2.9999999
);
}
// Densify a LINEARRING
template <>
template <>
void object::test<5>()
{
testDensify(
"LINEARRING (0 0, 0 6, 6 6, 0 0)",
"LINEARRING (0 0, 0 3, 0 6, 3 6, 6 6, 4 4, 2 2, 0 0)",
3.0
);
}
// Densify a POINT
// Results should match inputs
template <>
template <>
void object::test<6>()
{
testDensify(
"POINT (0 0)",
"POINT (0 0)",
3.0
);
}
// Densify a MULTIPOINT
// Results should match inputs
template <>
template <>
void object::test<7>()
{
testDensify(
"MULTIPOINT ((0 0), (10 10))",
"MULTIPOINT ((0 0), (10 10))",
3.0
);
}
// Densify an empty polygon
// Results should match inputs
template <>
template <>
void object::test<8>()
{
testDensify(
"POLYGON EMPTY",
"POLYGON EMPTY",
3.0
);
}
// Densify with an invalid tolerances should fail
// Note: this raises "IllegalArgumentException: Tolerance must be positive:
template <>
template <>
void object::test<9>()
{
input_ = fromWKT("POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))");
result_ = GEOSDensify(input_, 0.0);
ensure("result expected to be NULL", result_ == nullptr);
result_ = GEOSDensify(input_, -1.0);
ensure("result expected to be NULL", result_ == nullptr);
}
template<>
template<>
void object::test<10>()
{
input_ = fromWKT("CIRCULARSTRING (0 0, 1 1, 2 0)");
ensure(input_);
result_ = GEOSDensify(input_, 0.1);
ensure("curved geometries not supported", result_ == nullptr);
}
// Densify a LINESTRING Z, check that Z gets interpolated
template <>
template <>
void object::test<11>()
{
testDensify(
"LINESTRING Z (0 0 0, 0 6 2)",
"LINESTRING Z (0 0 0, 0 3 1, 0 6 2)",
3.0
);
}
// Densify a LINEARRING Z
template <>
template <>
void object::test<12>()
{
testDensify(
"LINEARRING Z (0 0 0, 0 6 2, 6 6 12, 0 0 0)",
"LINEARRING Z (0 0 0, 0 3 1, 0 6 2, 3 6 7, 6 6 12, 4 4 8, 2 2 4, 0 0 0)",
3.0
);
}
// Densify a POLYGON Z
template <>
template <>
void object::test<13>()
{
testDensify(
"POLYGON Z ((0 0 0, 10 0 2, 10 10 10, 0 10 2, 0 0 0), (1 1 0, 1 7 0, 7 7 0, 7 1 0, 1 1 0))",
"POLYGON Z ((0 0 0, 5 0 1, 10 0 2, 10 5 6, 10 10 10, 5 10 6, 0 10 2, 0 5 1, 0 0 0), (1 1 0, 1 4 0, 1 7 0, 4 7 0, 7 7 0, 7 4 0, 7 1 0, 4 1 0, 1 1 0))",
5.0
);
}
} // namespace tut
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