[geos-commits] r3821 - in trunk/tests/unit: . operation/buffer

[svn_geos at osgeo.org]

Author: mloskot
Date: 2013-06-12 06:22:48 -0700 (Wed, 12 Jun 2013)
New Revision: 3821

Added:
   trunk/tests/unit/operation/buffer/BufferBuilderTest.cpp
Modified:
   trunk/tests/unit/Makefile.am
Log:
Add updated C++ API test case for the left/right offset curve (ticket #633)

Modified: trunk/tests/unit/Makefile.am
===================================================================
--- trunk/tests/unit/Makefile.am	2013-06-12 09:56:59 UTC (rev 3820)
+++ trunk/tests/unit/Makefile.am	2013-06-12 13:22:48 UTC (rev 3821)
@@ -80,6 +80,7 @@
 	noding/SegmentPointComparatorTest.cpp \
 	noding/snapround/HotPixelTest.cpp \
 	noding/snapround/MCIndexSnapRounderTest.cpp \
+	operation/buffer/BufferBuilderTest.cpp \
 	operation/buffer/BufferOpTest.cpp \
 	operation/buffer/BufferParametersTest.cpp \
 	operation/distance/DistanceOpTest.cpp \

Added: trunk/tests/unit/operation/buffer/BufferBuilderTest.cpp
===================================================================
--- trunk/tests/unit/operation/buffer/BufferBuilderTest.cpp	                        (rev 0)
+++ trunk/tests/unit/operation/buffer/BufferBuilderTest.cpp	2013-06-12 13:22:48 UTC (rev 3821)
@@ -0,0 +1,112 @@
+// 
+// Test Suite for geos::operation::buffer::BufferBuilder class.
+
+// tut
+#include <tut.hpp>
+// geos
+#include <geos/operation/buffer/BufferBuilder.h>
+#include <geos/operation/buffer/BufferParameters.h>
+#include <geos/platform.h>
+#include <geos/geom/Coordinate.h>
+#include <geos/geom/GeometryFactory.h>
+#include <geos/geom/Geometry.h>
+#include <geos/algorithm/PointLocator.h>
+#include <geos/io/WKTReader.h>
+#include <geos/geom/CoordinateSequence.h>
+// std
+#include <memory>
+#include <string>
+#include <vector>
+
+namespace tut
+{
+    //
+    // Test Group
+    //
+
+    // Common data used by tests
+    struct test_bufferbuilder_data
+    {
+        geos::geom::GeometryFactory gf;
+        geos::io::WKTReader wktreader;
+        int const default_quadrant_segments;
+
+        typedef geos::geom::Geometry::AutoPtr GeomPtr;
+        typedef std::auto_ptr<geos::geom::CoordinateSequence> CSPtr;
+
+        test_bufferbuilder_data()
+            : gf(), wktreader(&gf), default_quadrant_segments(geos::operation::buffer::BufferParameters::DEFAULT_QUADRANT_SEGMENTS)
+        {
+            ensure_equals(default_quadrant_segments, int(8));
+        }
+    private:
+        // noncopyable
+        test_bufferbuilder_data(test_bufferbuilder_data const& other);
+        test_bufferbuilder_data& operator=(test_bufferbuilder_data const& rhs);
+    };
+
+    typedef test_group<test_bufferbuilder_data> group;
+    typedef group::object object;
+
+    group test_bufferbuilder_group("geos::operation::buffer::BufferBuilder");
+
+    //
+    // Test Cases
+    //
+
+    // Left-side and right-side offset curve
+    // See http://trac.osgeo.org/geos/ticket/633
+    template<>
+    template<>
+    void object::test<1>()
+    {
+        using geos::operation::buffer::BufferBuilder;
+        using geos::operation::buffer::BufferParameters;
+
+        // Original input from test in ticket #633
+        //std::string wkt0("LINESTRING ("
+        //    "665.7317504882812500 133.0762634277343700,"
+        //    "1774.4752197265625000 19.9391822814941410,"
+        //    "756.2413940429687500 466.8306579589843700,"
+        //    "626.1337890625000000 1898.0147705078125000,"
+        //    "433.8007202148437500 404.6052856445312500)");
+        //double const distance = 57.164000837203;
+
+        // Simplified equivalent input
+        std::string wkt0("LINESTRING(0 0, 50 -10, 10 10, 0 50, -10 10)");
+        double const distance = 5;
+
+        GeomPtr g0(wktreader.read(wkt0));
+        ensure(0 != g0.get());
+        ensure_equals(g0->getNumPoints(), std::size_t(5));
+
+        BufferParameters params;
+        params.setEndCapStyle(BufferParameters::CAP_FLAT);
+        params.setQuadrantSegments(8);
+        params.setJoinStyle(BufferParameters::JOIN_MITRE);
+        params.setMitreLimit(5.57F);
+        //params.setSingleSided(true); // DO NOT switch for non-areal input, see ticket #633
+        BufferBuilder builder(params);
+        ensure(distance > 0);
+
+        // left-side
+        {
+            GeomPtr gBuffer(builder.bufferLineSingleSided(g0.get(), distance, true));
+            ensure(0 != gBuffer.get());
+            ensure_equals(gBuffer->getGeometryTypeId(), geos::geom::GEOS_LINESTRING);
+            // Left-side offset curve expected with 5+ vertices
+            ensure(gBuffer->getNumPoints() >= g0->getNumPoints());
+        }
+
+        // right-side
+        {
+            GeomPtr gBuffer(builder.bufferLineSingleSided(g0.get(), distance, false));
+            ensure(0 != gBuffer.get());
+            ensure_equals(gBuffer->getGeometryTypeId(), geos::geom::GEOS_LINESTRING);
+            // Right-side offset curve expected with 5+ vertices
+            ensure(gBuffer->getNumPoints() >= g0->getNumPoints());
+        }
+    }
+
+} // namespace tut
+