Merge pull request #2182 from danrbailey/suppress_unittest_warning

Suppress unit test warning

Author: danrbailey

openvdb/openvdb/unittest/TestFile.cc

@@ -776,6 +776,11 @@ TEST_F(TestFile, testGridNaming)
             file.write(gridVec);
         }
 
+        // Redirect stderr to suppress expected warnings about duplicate grid names
+        std::streambuf* orig_cerr = std::cerr.rdbuf();
+        std::ostringstream null_stream;
+        std::cerr.rdbuf(null_stream.rdbuf());
+
         // Open the file for reading.
         File file(filename);
         file.setInstancingEnabled(instancing);
@@ -809,6 +814,9 @@ TEST_F(TestFile, testGridNaming)
             EXPECT_EQ((n < 0 ? 0 : n), grid->metaValue<openvdb::Int32>("index"));
         }
 
+        // Restore stderr
+        std::cerr.rdbuf(orig_cerr);
+
         // Read all three grids at once.
         GridPtrVecPtr allGrids = file.getGrids();
         EXPECT_TRUE(allGrids.get() != nullptr);