test: the buffer3d type name should be uppercase

The expected filenames use the buffer3d type name (ROUND, CYLSPHERE, FLAT), which are uppercased. We use lowercased strings in the unit test, hence the expected buffer files are not found, and the test are skipped.

This commit uppercases the type names so as to exploit the expected data.

test/unit/SFCGAL/algorithm/Buffer3DTest.cpp

@@ -101,13 +101,13 @@ BOOST_AUTO_TEST_CASE(testBuffer3D_Point)
     std::string typeName;
     switch (bufferType) {
     case algorithm::Buffer3D::ROUND:
-      typeName = "round";
+      typeName = "ROUND";
       break;
     case algorithm::Buffer3D::CYLSPHERE:
-      typeName = "cylsphere";
+      typeName = "CYLSPHERE";
       break;
     case algorithm::Buffer3D::FLAT:
-      typeName = "flat";
+      typeName = "FLAT";
       break;
     }
 
@@ -163,13 +163,13 @@ BOOST_AUTO_TEST_CASE(testBuffer3D_LineString)
     std::string typeName;
     switch (bufferType) {
     case algorithm::Buffer3D::ROUND:
-      typeName = "round";
+      typeName = "ROUND";
       break;
     case algorithm::Buffer3D::CYLSPHERE:
-      typeName = "cylsphere";
+      typeName = "CYLSPHERE";
       break;
     case algorithm::Buffer3D::FLAT:
-      typeName = "flat";
+      typeName = "FLAT";
       break;
     }