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msvcrt/tests: Add a test for fwrite flushing behavior.

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Grazvydas Ignotas 2014-06-14 02:23:55 +03:00 committed by Alexandre Julliard
parent 9614283996
commit 147be95a68
1 changed files with 60 additions and 0 deletions
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60
dlls/msvcrt/tests/file.c
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@ -2219,6 +2219,65 @@ static void test__open_osfhandle(void)
CloseHandle(tmp);
}
static void test_write_flush_size(FILE *file, size_t bufsize)
{
char *inbuffer;
char *outbuffer;
size_t size;
int fd;
fd = fileno(file);
inbuffer = calloc(bufsize + 1, 1);
outbuffer = calloc(bufsize + 1, 1);
_snprintf(outbuffer, bufsize + 1, "0,1,2,3,4,5,6,7,8,9");
for (size = bufsize + 1; size >= bufsize - 1; size--) {
rewind(file);
fwrite(outbuffer, 1, size, file);
/* lseek() below intentionally redirects the write in fflush() to detect
* if fwrite() has already flushed the whole buffer or not.
*/
lseek(fd, 1, SEEK_SET);
fflush(file);
fseek(file, 0, SEEK_SET);
ok(fread(inbuffer, 1, bufsize, file) == bufsize, "read failed\n");
if (size == bufsize)
todo_wine ok(memcmp(outbuffer, inbuffer, bufsize) == 0, "missing flush by %d byte write\n", size);
else
ok(memcmp(outbuffer, inbuffer, bufsize) != 0, "unexpected flush by %d byte write\n", size);
}
rewind(file);
fwrite(outbuffer, 1, bufsize / 2, file);
fwrite(outbuffer + bufsize / 2, 1, bufsize / 2, file);
lseek(fd, 1, SEEK_SET);
fflush(file);
fseek(file, 0, SEEK_SET);
ok(fread(inbuffer, 1, bufsize, file) == bufsize, "read failed\n");
ok(memcmp(outbuffer, inbuffer, bufsize) != 0, "unexpected flush by %d/2 byte double write\n", bufsize);
free(inbuffer);
free(outbuffer);
}
static void test_write_flush(void)
{
char iobuf[1024];
char *tempf;
FILE *file;
tempf = _tempnam(".","wne");
file = fopen(tempf, "wb+");
ok(file != NULL, "unable to create test file\n");
iobuf[0] = 0;
fwrite(iobuf, 1, 1, file); /* needed for wine to init _bufsiz */
todo_wine ok(file->_bufsiz == 4096, "incorrect default buffer size: %d", file->_bufsiz);
test_write_flush_size(file, file->_bufsiz);
setvbuf(file, iobuf, _IOFBF, sizeof(iobuf));
test_write_flush_size(file, sizeof(iobuf));
fclose(file);
unlink(tempf);
free(tempf);
}
START_TEST(file)
{
int arg_c;
@ -2284,6 +2343,7 @@ START_TEST(file)
test_stdin();
test_mktemp();
test__open_osfhandle();
test_write_flush();
/* Wait for the (_P_NOWAIT) spawned processes to finish to make sure the report
* file contains lines in the correct order