This is the SQL and C++ DuckDB Unittests

Some of the tests require a special environment flag to be set so they can properly run.

The tests located in test/parallel_csv/test_parallel_csv.cpp run the parallel CSV reader over multiple configurations of threads and buffer sizes. To run them DUCKDB_RUN_PARALLEL_CSV_TESTS must be set. This is done because these tests are quite slow and should only be executed on release builds with no debugging options set.

The ADBC tests are in test/api/adbc/test_adbc.cpp. To run them the DuckDB library path must be provided in the DUCKDB_INSTALL_LIB variable.