def test_empty_file(self):
"""
make sure an empty file does not throw an error when reverse_readline
is called this was a problem with an earlier implementation
"""
with open(os.path.join(test_dir, "empty_file.txt")) as f:
for idx, line in enumerate(reverse_readline(f)):
raise ValueError("an empty file is being read!")
def test_empty_file(self):
"""
make sure an empty file does not throw an error when reverse_readline
is called this was a problem with an earlier implementation
"""
with open(os.path.join(test_dir, "empty_file.txt")) as f:
for idx, line in enumerate(reverse_readline(f)):
raise ValueError("an empty file is being read!")
def test_reverse_readline(self):
"""
We are making sure a file containing line numbers is read in reverse
order, i.e. the first line that is read corresponds to the last line.
number
"""
with open(os.path.join(test_dir, "three_thousand_lines.txt")) as f:
for idx, line in enumerate(reverse_readline(f)):
self.assertEqual(int(line), self.NUMLINES - idx,
"read_backwards read {} whereas it should "
"have read {}".format(
int(line), self.NUMLINES - idx))
def test_reverse_readline(self):
"""
We are making sure a file containing line numbers is read in reverse
order, i.e. the first line that is read corresponds to the last line.
number
"""
with open(os.path.join(test_dir, "three_thousand_lines.txt")) as f:
for idx, line in enumerate(reverse_readline(f)):
self.assertEqual(
int(line), self.NUMLINES - idx,
"read_backwards read {} whereas it should "
"have read {}".format(int(line), self.NUMLINES - idx))
