Prefer base_test_fixture::contains_string utility.
Prefer base_test_fixture::contains_string utility.

Use the wrapper function instead of std::string::find
and verbose comparison against npos.

ChrisBFX/nanodbc,norsync/nanodbc,norsync/nanodbc,nanodbc/nanodbc,ChrisBFX/nanodbc,mcg1969/nanodbc,nanodbc/nanodbc,mcg1969/nanodbc