TESTCASE( _PDCLIB_filelist == file2 );
TESTCASE( fclose( file1 ) == 0 );
TESTCASE( _PDCLIB_filelist == file2 );
TESTCASE( fclose( file2 ) == 0 );
TESTCASE( _PDCLIB_filelist == stdin );
TESTCASE( _PDCLIB_filelist == file2 );
TESTCASE( fclose( file1 ) == 0 );
TESTCASE( _PDCLIB_filelist == file2 );
TESTCASE( fclose( file2 ) == 0 );
TESTCASE( _PDCLIB_filelist == stdin );