TESTCASE( strncmp( abcde, abcdx, 4 ) == 0 );
TESTCASE( strncmp( abcde, x, 0 ) == 0 );
TESTCASE( strncmp( abcde, x, 1 ) < 0 );
TESTCASE( strncmp( abcde, abcdx, 4 ) == 0 );
TESTCASE( strncmp( abcde, x, 0 ) == 0 );
TESTCASE( strncmp( abcde, x, 1 ) < 0 );