C++ comments and uri clean up in testing [ci skip]

Author: cgiachalis

inst/tinytest/test_arrayschema.R

@@ -217,6 +217,8 @@ trg <- c(col1 = FALSE, enum1 = TRUE, col2 = FALSE, enum2 = TRUE, enum3 = TRUE)
 
 expect_equal(tiledb_array_has_enumeration(arr), trg)
 
+unlink(uri)
+
 # case 2 (unordered enums)
 uri <- tempfile()
 
@@ -232,6 +234,8 @@ arr <- tiledb_array(uri)
 
 expect_equal(tiledb_array_has_enumeration(arr), trg)
 
+unlink(uri)
+
 # case 3 (unordered map all attributes)
 uri <- tempfile()
 

src/libtiledb.cpp

@@ -1918,6 +1918,8 @@ XPtr<tiledb::ArraySchema> libtiledb_array_schema(
             as<std::vector<std::string>>(enumerations[i]);
         std::string enum_name = std::string(enumnames[i]);
 
+        // Get attribute by enum name ('attributes' list is named from R level)
+        // See https://github.com/TileDB-Inc/TileDB-R/issues/853
         XPtr<tiledb::Attribute> attr =
             as<XPtr<tiledb::Attribute>>(attributes[enum_name]);