def test_copytruncate(self):
tail = FileTail(filename=self.test_log)
lines = ["line %d" % i for i in range(5)]
for line in lines:
self.write_log(line)
assert_that(tail.readlines(), equal_to(lines))
# mock copytruncate mechanic
copyfile(self.test_log, self.test_log_rotated)
with open(self.test_log, 'w') as file_to_truncate:
file_to_truncate.truncate()
next_lines = ["line %d" % i for i in range(5, 10)]
for line in next_lines:
self.write_log(line)
# check offset is updated to the beginning
assert_that(tail.readlines(), equal_to(next_lines))
# resume normal behavior
final_lines = ["line %d" % i for i in range(10, 15)]
for line in final_lines:
self.write_log(line)
assert_that(tail.readlines(), equal_to(final_lines))
def test_cache_offset(self):
tail = FileTail(filename=self.test_log)
self.write_log('something')
tail.readlines()
old_offset = tail._offset
# del tail object
del tail
# create new
tail = FileTail(filename=self.test_log)
assert_that(tail._offset, equal_to(old_offset))
def test_cache_offset(self):
tail = FileTail(filename=self.test_log)
self.write_log('something')
tail.readlines()
old_offset = tail._offset
# del tail object
del tail
# create new
tail = FileTail(filename=self.test_log)
assert_that(tail._offset, equal_to(old_offset))
def test_no_new_lines(self):
# check one new line
tail = FileTail(filename=self.test_log)
self.write_log('something')
new_lines = tail.readlines()
assert_that(new_lines, has_length(1))
# check no new lines
new_lines = tail.readlines()
assert_that(new_lines, has_length(0))
# and check again one new line
tail = FileTail(filename=self.test_log)
self.write_log('something')
new_lines = tail.readlines()
assert_that(new_lines, has_length(1))
def test_no_new_lines(self):
# check one new line
tail = FileTail(filename=self.test_log)
self.write_log('something')
new_lines = tail.readlines()
assert_that(new_lines, has_length(1))
# check no new lines
new_lines = tail.readlines()
assert_that(new_lines, has_length(0))
# and check again one new line
tail = FileTail(filename=self.test_log)
self.write_log('something')
new_lines = tail.readlines()
assert_that(new_lines, has_length(1))
def test_read_new_lines(self):
tail = FileTail(filename=self.test_log)
# write messages and read them
for i in xrange(10):
line = "this is %s line" % i
self.write_log(line)
new_lines = tail.readlines()
assert_that(new_lines, has_length(1))
assert_that(new_lines.pop(), equal_to(line))
def test_read_new_lines(self):
tail = FileTail(filename=self.test_log)
# write messages and read them
for i in xrange(10):
line = "this is %s line" % i
self.write_log(line)
new_lines = tail.readlines()
assert_that(new_lines, has_length(1))
assert_that(new_lines.pop(), equal_to(line))
def test_rotate(self):
tail = FileTail(filename=self.test_log)
# rotate it
os.rename(self.test_log, self.test_log_rotated)
# write something in a new one
self.write_log("from a new file")
# read tail and get two lines
new_lines = tail.readlines()
assert_that(new_lines, has_length(1))
assert_that(new_lines, equal_to(['from a new file']))
def test_rotate(self):
tail = FileTail(filename=self.test_log)
# rotate it
os.rename(self.test_log, self.test_log_rotated)
# write something in a new one
self.write_log("from a new file")
# read tail and get two lines
new_lines = tail.readlines()
assert_that(new_lines, has_length(1))
assert_that(new_lines, equal_to(['from a new file']))
def test_keeps_trailing_spaces(self):
tail = FileTail(filename=self.test_log)
self.write_log('foo bar baz ')
lines = tail.readlines()
assert_that(lines, has_length(1))
assert_that(lines[0], ends_with(' '))
