TESTCASE( fwrite( teststring, 1, strlen( teststring ), fh ) == strlen( teststring ) );
/* General functionality */
TESTCASE( fseek( fh, -1, SEEK_END ) == 0 );
TESTCASE( fwrite( teststring, 1, strlen( teststring ), fh ) == strlen( teststring ) );
/* General functionality */
TESTCASE( fseek( fh, -1, SEEK_END ) == 0 );