def test_read_greater_than_pagesize():
f = filepath()
s = os.sysconf("SC_PAGE_SIZE") * 2 + 1
with base.posix_open(f, os.O_RDWR | os.O_CREAT) as fd:
base.random_data(fd, s)
# time.sleep(1)
with base.posix_open(f, os.O_RDONLY) as fd:
assert_equals(s, len(os.read(fd, s)))
def test_read_and_stat_size_field():
f = filepath()
with base.posix_open(f, os.O_RDWR | os.O_CREAT) as fd:
written = base.random_data(fd, random.randint(1024, 8192))
with base.posix_open(f, os.O_RDONLY) as fd:
data = os.read(fd, 8192)
stat = os.fstat(fd)
assert_equals(written, len(data))
assert_equals(written, stat.st_size)
def test_read_returns_eof_corretly():
f = filepath()
with open(f, "w") as fh:
fh.write("foobar")
with base.posix_open(f, os.O_RDONLY) as fd:
os.read(fd, 6)
assert_equals("", os.read(fd, 6))
def test_open_truncate_set_size_to_zero():
f = filepath()
with open(f, "w") as fh:
fh.write("foobar")
assert_greater(os.stat(f).st_size, 0)
with base.posix_open(f, os.O_RDWR | os.O_TRUNC):
pass
assert_equals(os.stat(f).st_size, 0)
def test_write_update_mtime():
f = filepath()
with base.posix_open(f, os.O_RDWR | os.O_CREAT) as fd:
s0 = os.fstat(fd)
time.sleep(1)
os.write(fd, "foobar")
os.fsync(fd) # TODO:fix fstat
s1 = os.fstat(fd)
assert_less(s0.st_mtime, s1.st_mtime)
def test_write_updates_size_field():
f = filepath()
with base.posix_open(f, os.O_RDWR | os.O_CREAT) as fd:
s = os.fstat(fd)
assert_equal(0, s.st_size)
os.write(fd, "foobar")
os.fsync(fd) # TODO:fix fstat
s = os.fstat(fd)
assert_equal(6, s.st_size)
def test_read_with_buffersize_greater_than_file():
f = filepath()
with open(f, "w") as fh:
fh.write("foobar")
with base.posix_open(f, os.O_RDONLY) as fd:
assert_equals("foobar", os.read(fd, 1024))
def test_read():
f = filepath()
with open(f, "w") as fh:
fh.write("foobar")
with base.posix_open(f, os.O_RDONLY) as fd:
assert_equals("foobar", os.read(fd, 6))
def test_open_rdonly_should_not_allow_writing():
f = filepath()
base.touch(f)
with base.posix_open(f, os.O_RDONLY) as fd:
assert_raises(OSError, os.write, fd, "foobar")