Regression test for mitre buffer that previously made an invalid geom…

…etry
libgeos · Feb 26, 2024 · 0a8fc37 · 0a8fc37
1 parent 7273a96
commit 0a8fc37
Showing 1 changed file with 13 additions and 0 deletions.
diff --git a/tests/unit/operation/buffer/BufferParametersTest.cpp b/tests/unit/operation/buffer/BufferParametersTest.cpp
@@ -367,8 +367,21 @@ void object::test<22>()
         "POLYGON ((-4.14213562373095 -10, -10 -4.14213562373095, -10 104.14213562373095, -4.14213562373095 110, 104.14213562373095 110, 110 104.14213562373095, 110 -4.142135623730951, 104.14213562373095 -10, -4.14213562373095 -10))");
 }
 
+// Buffer produces invalid output
+// https://github.com/libgeos/geos/issues/856
+template<>
+template<>
+void object::test<23>()
+{
+    auto geom = _reader.read("POLYGON ((-23.989123360549296 73.1287474328027, -22.537997105552297 94.06368412079055,-18.796973600895146 93.80437130274495,-17.80121237894408 108.16990157009043,-21.542235883601226 108.42921438813606,-20.967403753721864 116.7221345967023,-4.728530705460814 116.7221568196225,-7.82790182044367 72.00851605865441,-23.989123360549296 73.1287474328027))");
 
+    BufferParameters bp;
+    bp.setJoinStyle(BufferParameters::JOIN_MITRE);
+    BufferOp op(geom.get(), bp);
 
+    auto result = op.getResultGeometry(10);
+    ensure(result->isValid());
+}
 
 
 } // namespace tut