From 8d980d434eb43bbba1a0dca99ad6a8ac05fad3a4 Mon Sep 17 00:00:00 2001
From: Jiri Drbalek <jiri.drbalek@firma.seznam.cz>
Date: Thu, 18 May 2017 14:49:48 +0000
Subject: [PATCH] unit tests - closing polygon on reprojection

---
 .../vertex_adapter/transform_path_adapter.cpp | 117 ++++++++++++++++++
 1 file changed, 117 insertions(+)
 create mode 100644 test/unit/vertex_adapter/transform_path_adapter.cpp

diff --git a/test/unit/vertex_adapter/transform_path_adapter.cpp b/test/unit/vertex_adapter/transform_path_adapter.cpp
new file mode 100644
index 000000000..01de4ee0c
--- /dev/null
+++ b/test/unit/vertex_adapter/transform_path_adapter.cpp
@@ -0,0 +1,117 @@
+#include "catch.hpp"
+
+#include <mapnik/transform_path_adapter.hpp>
+#include <mapnik/geometry/correct.hpp>
+#include <mapnik/vertex_adapters.hpp>
+#include <mapnik/transform_path_adapter.hpp>
+#include <mapnik/view_transform.hpp>
+#include <mapnik/proj_transform.hpp>
+#include <mapnik/projection.hpp>
+
+TEST_CASE("transform_path_adapter") {
+
+SECTION("polygon closing - epsg 2330") {
+    mapnik::geometry::polygon<double> g;
+    g.emplace_back();
+    auto & exterior = g.back();
+
+    exterior.emplace_back(88.1844308217992, 69.3553916041731);
+    exterior.emplace_back(88.1846166524913, 69.3552821191223);
+    exterior.emplace_back(88.1845090893871, 69.3553454342903);
+    exterior.emplace_back(88.1844308217992, 69.3553916041731);
+
+    using va_type = mapnik::geometry::polygon_vertex_adapter<double>;
+    using path_type = mapnik::transform_path_adapter<mapnik::view_transform, va_type>;
+
+    va_type va(g);
+    mapnik::box2d<double> extent(16310607, 7704513, 16310621, 7704527);
+    mapnik::view_transform tr(512, 512, extent);
+    mapnik::projection proj1("+init=epsg:2330");
+    mapnik::projection proj2("+init=epsg:4326");
+    mapnik::proj_transform prj_trans(proj1, proj2);
+    path_type path(tr, va, prj_trans);
+
+    double x,y;
+    unsigned cmd;
+
+    cmd = path.vertex(&x, &y);
+    CHECK( cmd == mapnik::SEG_MOVETO );
+    CHECK( x == Approx(110.4328050613) );
+    CHECK( y == Approx(20.2204537392) );
+
+    cmd = path.vertex(&x, &y);
+    CHECK( cmd == mapnik::SEG_LINETO );
+    CHECK( x == Approx(342.1220560074) );
+    CHECK( y == Approx(486.732225963) );
+
+    cmd = path.vertex(&x, &y);
+    CHECK( cmd == mapnik::SEG_LINETO );
+    CHECK( x == Approx(207.9962329183) );
+    CHECK( y == Approx(216.9376912798) );
+
+    // close
+    cmd = path.vertex(&x, &y);
+    CHECK( cmd == mapnik::SEG_CLOSE );
+    CHECK( x == 0 );
+    CHECK( y == 0 );
+
+    // end
+    cmd = path.vertex(&x, &y);
+    CHECK( cmd == mapnik::SEG_END );
+    CHECK( x == 0 );
+    CHECK( y == 0 );
+}
+
+SECTION("polygon closing - epsg 32633") {
+    mapnik::geometry::polygon<double> g;
+    g.emplace_back();
+    auto & exterior = g.back();
+
+    exterior.emplace_back(13, 13);
+    exterior.emplace_back(14, 13);
+    exterior.emplace_back(14, 14);
+    exterior.emplace_back(14, 14);
+
+    using va_type = mapnik::geometry::polygon_vertex_adapter<double>;
+    using path_type = mapnik::transform_path_adapter<mapnik::view_transform, va_type>;
+
+    va_type va(g);
+    mapnik::box2d<double> extent(166022, 0, 833978, 9329005);
+    mapnik::view_transform tr(512, 512, extent);
+    mapnik::projection proj1("+init=epsg:32633");
+    mapnik::projection proj2("+init=epsg:4326");
+    mapnik::proj_transform prj_trans(proj1, proj2);
+    path_type path(tr, va, prj_trans);
+
+    double x,y;
+    unsigned cmd;
+
+    cmd = path.vertex(&x, &y);
+    CHECK( cmd == mapnik::SEG_MOVETO );
+    CHECK( x == Approx(89.7250280748) );
+    CHECK( y == Approx(433.0795069885) );
+
+    cmd = path.vertex(&x, &y);
+    CHECK( cmd == mapnik::SEG_LINETO );
+    CHECK( x == Approx(172.873973465) );
+    CHECK( y == Approx(433.1145779929) );
+
+    cmd = path.vertex(&x, &y);
+    CHECK( cmd == mapnik::SEG_LINETO );
+    CHECK( x == Approx(173.2194366775) );
+    CHECK( y == Approx(427.0442504759) );
+
+    // close
+    cmd = path.vertex(&x, &y);
+    CHECK( cmd == mapnik::SEG_CLOSE );
+    CHECK( x == 0 );
+    CHECK( y == 0 );
+
+    // end
+    cmd = path.vertex(&x, &y);
+    CHECK( cmd == mapnik::SEG_END );
+    CHECK( x == 0 );
+    CHECK( y == 0 );
+}
+
+}