TEST_UNCHANGED
TEST_UNCHANGED(fwide(f, 0));
TEST_UNCHANGED(feof(f));
TEST_UNCHANGED(ferror(f));
TEST_UNCHANGED(fileno(f));
TEST_UNCHANGED(clearerr(f));
TEST_UNCHANGED(fflush(f));
TEST_UNCHANGED(fpurge(f));
TEST_UNCHANGED(fgetpos(f, &pos));
TEST_UNCHANGED(fgetpos(f, &pos); fsetpos(f, &pos));
TEST_UNCHANGED(ftell(f));
TEST_UNCHANGED(ftello(f));
TEST_UNCHANGED(fseek(f, 1, SEEK_CUR));
TEST_UNCHANGED(fseek(f, 1, SEEK_SET));
TEST_UNCHANGED(fseek(f, 1, SEEK_END));
TEST_UNCHANGED(fseeko(f, 1, SEEK_CUR));
TEST_UNCHANGED(fseeko(f, 1, SEEK_SET));
TEST_UNCHANGED(fseeko(f, 1, SEEK_END));
TEST_UNCHANGED(rewind(f));
TEST_UNCHANGED(setbuf(f, NULL));
TEST_UNCHANGED(setbuf(f, buffer));
TEST_UNCHANGED(setvbuf(f, buffer, _IONBF, BUFSIZ));
TEST_UNCHANGED(setvbuf(f, buffer, _IOLBF, BUFSIZ));
TEST_UNCHANGED(setvbuf(f, buffer, _IOFBF, BUFSIZ));
TEST_UNCHANGED(setvbuf(f, NULL, _IONBF, 0));
TEST_UNCHANGED(setvbuf(f, NULL, _IOLBF, 0));
TEST_UNCHANGED(setvbuf(f, NULL, _IOFBF, 0));
TEST_UNCHANGED(setbuffer(f, NULL, 0));
TEST_UNCHANGED(setbuffer(f, buffer, BUFSIZ));
TEST_UNCHANGED(setlinebuf(f));
TEST_UNCHANGED(flockfile(f);funlockfile(f));
TEST_UNCHANGED(ftrylockfile(f);funlockfile(f));