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from difflib import unified_diff
import os
import sys
from conf import hook
from exc.test_failed import TestFailed
""" Post-Test Hook: ExpectedFiles
This is a Post-Test hook that checks the test directory for the files it
contains. A dictionary object is passed to it, which contains a mapping of
filenames and contents of all the files that the directory is expected to
contain.
Raises a TestFailed exception if the expected files are not found or if extra
files are found, else returns gracefully.
"""
@hook()
class ExpectedFiles:
def __init__(self, expected_fs):
self.expected_fs = expected_fs
@staticmethod
def gen_local_fs_snapshot():
snapshot = {}
for parent, dirs, files in os.walk('.'):
for name in files:
f = {'content': ''}
file_path = os.path.join(parent, name)
with open(file_path) as fp:
f['content'] = fp.read()
snapshot[file_path[2:]] = f
return snapshot
def __call__(self, test_obj):
local_fs = self.gen_local_fs_snapshot()
for file in self.expected_fs:
if file.name in local_fs:
local_file = local_fs.pop(file.name)
if file.content != local_file['content']:
for line in unified_diff(local_file['content'],
file.content,
fromfile='Actual',
tofile='Expected'):
print(line, file=sys.stderr)
raise TestFailed('Contents of %s do not match' % file.name)
else:
raise TestFailed('Expected file %s not found.' % file.name)
if local_fs:
print(local_fs)
raise TestFailed('Extra files downloaded.')
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