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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""Tests for the EWF image support helper functions."""
from __future__ import unicode_literals
import unittest
from dfvfs.lib import ewf
from dfvfs.path import fake_path_spec
from dfvfs.path import ewf_path_spec
from dfvfs.resolver import context
from dfvfs.vfs import fake_file_system
from tests import test_lib as shared_test_lib
class GlobEWFFileTest(shared_test_lib.BaseTestCase):
"""The unit test for the EWF image file glob functionality."""
def _BuildFileFakeFileSystem(
self, filename, number_of_segments, segment_file_path_specs):
"""Builds a fake file system containing EWF segment files.
Args:
filename (str): filename of the first segment file with extension.
number_of_segments (int): number of segments.
segment_file_path_specs (list[PathSpec]): resulting segment file path
specifications.
Returns:
FakeFileSystem: fake file system.
"""
resolver_context = context.Context()
file_system = fake_file_system.FakeFileSystem(resolver_context)
filename, _, extension = filename.partition('.')
number_of_segments += 1
for segment_number in range(1, number_of_segments):
if segment_number < 100:
if extension[1] == 'x':
path = '/{0:s}.{1:s}x{2:02d}'.format(
filename, extension[0], segment_number)
else:
path = '/{0:s}.{1:s}{2:02d}'.format(
filename, extension[0], segment_number)
else:
segment_index = segment_number - 100
segment_index, remainder = divmod(segment_index, 26)
if extension[0].islower():
third_letter = chr(ord('a') + remainder)
else:
third_letter = chr(ord('A') + remainder)
segment_index, remainder = divmod(segment_index, 26)
if extension[0].islower():
second_letter = chr(ord('a') + remainder)
else:
second_letter = chr(ord('A') + remainder)
first_letter = chr(ord(extension[0]) + segment_index)
if extension[1] == 'x':
path = '/{0:s}.{1:s}x{2:s}{3:s}'.format(
filename, first_letter, second_letter, third_letter)
else:
path = '/{0:s}.{1:s}{2:s}{3:s}'.format(
filename, first_letter, second_letter, third_letter)
file_system.AddFileEntry(path)
path_spec = fake_path_spec.FakePathSpec(location=path)
segment_file_path_specs.append(path_spec)
return file_system
def testGlobE01(self):
"""Test the glob function."""
expected_segment_file_path_specs = []
file_system = self._BuildFileFakeFileSystem(
'ext2.E01', 1, expected_segment_file_path_specs)
# Test single segment file: E01.
path_spec = fake_path_spec.FakePathSpec(location='/ext2.E01')
path_spec = ewf_path_spec.EWFPathSpec(parent=path_spec)
segment_file_path_specs = ewf.EWFGlobPathSpec(file_system, path_spec)
self.assertEqual(
len(segment_file_path_specs), len(expected_segment_file_path_specs))
self.assertEqual(
segment_file_path_specs, expected_segment_file_path_specs)
# Test non exiting segment file: E01.
expected_segment_file_path_specs = []
path_spec = fake_path_spec.FakePathSpec(location='/bogus.E01')
path_spec = ewf_path_spec.EWFPathSpec(parent=path_spec)
segment_file_path_specs = ewf.EWFGlobPathSpec(file_system, path_spec)
self.assertEqual(
len(segment_file_path_specs), len(expected_segment_file_path_specs))
self.assertEqual(
segment_file_path_specs, expected_segment_file_path_specs)
# Test multiple segment files: E01-E10.
expected_segment_file_path_specs = []
file_system = self._BuildFileFakeFileSystem(
'ext2.E01', 10, expected_segment_file_path_specs)
path_spec = fake_path_spec.FakePathSpec(location='/ext2.E01')
path_spec = ewf_path_spec.EWFPathSpec(parent=path_spec)
segment_file_path_specs = ewf.EWFGlobPathSpec(file_system, path_spec)
self.assertEqual(
len(segment_file_path_specs), len(expected_segment_file_path_specs))
self.assertEqual(
segment_file_path_specs, expected_segment_file_path_specs)
# Test multiple segment files: E01-E99,EAA.
expected_segment_file_path_specs = []
file_system = self._BuildFileFakeFileSystem(
'ext2.E01', 100, expected_segment_file_path_specs)
path_spec = fake_path_spec.FakePathSpec(location='/ext2.E01')
path_spec = ewf_path_spec.EWFPathSpec(parent=path_spec)
segment_file_path_specs = ewf.EWFGlobPathSpec(file_system, path_spec)
self.assertEqual(
len(segment_file_path_specs), len(expected_segment_file_path_specs))
self.assertEqual(
segment_file_path_specs, expected_segment_file_path_specs)
# Test multiple segment files: E01-E99,EAA-EBA.
expected_segment_file_path_specs = []
file_system = self._BuildFileFakeFileSystem(
'ext2.E01', 126, expected_segment_file_path_specs)
path_spec = fake_path_spec.FakePathSpec(location='/ext2.E01')
path_spec = ewf_path_spec.EWFPathSpec(parent=path_spec)
segment_file_path_specs = ewf.EWFGlobPathSpec(file_system, path_spec)
self.assertEqual(
len(segment_file_path_specs), len(expected_segment_file_path_specs))
self.assertEqual(
segment_file_path_specs, expected_segment_file_path_specs)
# Test multiple segment files: E01-E99,EAA-EZZ.
expected_segment_file_path_specs = []
file_system = self._BuildFileFakeFileSystem(
'ext2.E01', 775, expected_segment_file_path_specs)
path_spec = fake_path_spec.FakePathSpec(location='/ext2.E01')
path_spec = ewf_path_spec.EWFPathSpec(parent=path_spec)
segment_file_path_specs = ewf.EWFGlobPathSpec(file_system, path_spec)
self.assertEqual(
len(segment_file_path_specs), len(expected_segment_file_path_specs))
self.assertEqual(
segment_file_path_specs, expected_segment_file_path_specs)
# Test multiple segment files: E01-E99,EAA-ZZZ.
expected_segment_file_path_specs = []
file_system = self._BuildFileFakeFileSystem(
'ext2.E01', 14970, expected_segment_file_path_specs)
path_spec = fake_path_spec.FakePathSpec(location='/ext2.E01')
path_spec = ewf_path_spec.EWFPathSpec(parent=path_spec)
segment_file_path_specs = ewf.EWFGlobPathSpec(file_system, path_spec)
self.assertEqual(
len(segment_file_path_specs), len(expected_segment_file_path_specs))
self.assertEqual(
segment_file_path_specs, expected_segment_file_path_specs)
# Test multiple segment files: E01-E99,EAA-[ZZ.
expected_segment_file_path_specs = []
file_system = self._BuildFileFakeFileSystem(
'ext2.E01', 14971, expected_segment_file_path_specs)
path_spec = fake_path_spec.FakePathSpec(location='/ext2.E01')
path_spec = ewf_path_spec.EWFPathSpec(parent=path_spec)
with self.assertRaises(RuntimeError):
segment_file_path_specs = ewf.EWFGlobPathSpec(file_system, path_spec)
def testGlobEx01(self):
"""Test the glob function."""
expected_segment_file_path_specs = []
file_system = self._BuildFileFakeFileSystem(
'image.Ex01', 1, expected_segment_file_path_specs)
# Test single segment file: Ex01.
path_spec = fake_path_spec.FakePathSpec(location='/image.Ex01')
path_spec = ewf_path_spec.EWFPathSpec(parent=path_spec)
segment_file_path_specs = ewf.EWFGlobPathSpec(file_system, path_spec)
self.assertEqual(
len(segment_file_path_specs), len(expected_segment_file_path_specs))
self.assertEqual(
segment_file_path_specs, expected_segment_file_path_specs)
# Test non exiting segment file: Ex01.
expected_segment_file_path_specs = []
path_spec = fake_path_spec.FakePathSpec(location='/bogus.Ex01')
path_spec = ewf_path_spec.EWFPathSpec(parent=path_spec)
segment_file_path_specs = ewf.EWFGlobPathSpec(file_system, path_spec)
self.assertEqual(
len(segment_file_path_specs), len(expected_segment_file_path_specs))
self.assertEqual(
segment_file_path_specs, expected_segment_file_path_specs)
# Test multiple segment files: Ex01-Ex10.
expected_segment_file_path_specs = []
file_system = self._BuildFileFakeFileSystem(
'image.Ex01', 10, expected_segment_file_path_specs)
path_spec = fake_path_spec.FakePathSpec(location='/image.Ex01')
path_spec = ewf_path_spec.EWFPathSpec(parent=path_spec)
segment_file_path_specs = ewf.EWFGlobPathSpec(file_system, path_spec)
self.assertEqual(
len(segment_file_path_specs), len(expected_segment_file_path_specs))
self.assertEqual(
segment_file_path_specs, expected_segment_file_path_specs)
# Test multiple segment files: Ex01-Ex99,ExAA.
expected_segment_file_path_specs = []
file_system = self._BuildFileFakeFileSystem(
'image.Ex01', 100, expected_segment_file_path_specs)
path_spec = fake_path_spec.FakePathSpec(location='/image.Ex01')
path_spec = ewf_path_spec.EWFPathSpec(parent=path_spec)
segment_file_path_specs = ewf.EWFGlobPathSpec(file_system, path_spec)
self.assertEqual(
len(segment_file_path_specs), len(expected_segment_file_path_specs))
self.assertEqual(
segment_file_path_specs, expected_segment_file_path_specs)
# Test multiple segment files: Ex01-Ex99,ExAA-ExBA.
expected_segment_file_path_specs = []
file_system = self._BuildFileFakeFileSystem(
'image.Ex01', 126, expected_segment_file_path_specs)
path_spec = fake_path_spec.FakePathSpec(location='/image.Ex01')
path_spec = ewf_path_spec.EWFPathSpec(parent=path_spec)
segment_file_path_specs = ewf.EWFGlobPathSpec(file_system, path_spec)
self.assertEqual(
len(segment_file_path_specs), len(expected_segment_file_path_specs))
self.assertEqual(
segment_file_path_specs, expected_segment_file_path_specs)
# Test multiple segment files: Ex01-Ex99,ExAA-ExZZ.
expected_segment_file_path_specs = []
file_system = self._BuildFileFakeFileSystem(
'image.Ex01', 775, expected_segment_file_path_specs)
path_spec = fake_path_spec.FakePathSpec(location='/image.Ex01')
path_spec = ewf_path_spec.EWFPathSpec(parent=path_spec)
segment_file_path_specs = ewf.EWFGlobPathSpec(file_system, path_spec)
self.assertEqual(
len(segment_file_path_specs), len(expected_segment_file_path_specs))
self.assertEqual(
segment_file_path_specs, expected_segment_file_path_specs)
# Test multiple segment files: Ex01-Ex99,ExAA-ZxZZ.
expected_segment_file_path_specs = []
file_system = self._BuildFileFakeFileSystem(
'image.Ex01', 14970, expected_segment_file_path_specs)
path_spec = fake_path_spec.FakePathSpec(location='/image.Ex01')
path_spec = ewf_path_spec.EWFPathSpec(parent=path_spec)
segment_file_path_specs = ewf.EWFGlobPathSpec(file_system, path_spec)
self.assertEqual(
len(segment_file_path_specs), len(expected_segment_file_path_specs))
self.assertEqual(
segment_file_path_specs, expected_segment_file_path_specs)
# Test multiple segment files: Ex01-Ex99,ExAA-[xZZ.
expected_segment_file_path_specs = []
file_system = self._BuildFileFakeFileSystem(
'image.Ex01', 14971, expected_segment_file_path_specs)
path_spec = fake_path_spec.FakePathSpec(location='/image.Ex01')
path_spec = ewf_path_spec.EWFPathSpec(parent=path_spec)
with self.assertRaises(RuntimeError):
segment_file_path_specs = ewf.EWFGlobPathSpec(file_system, path_spec)
def testGlobs01(self):
"""Test the glob function."""
expected_segment_file_path_specs = []
file_system = self._BuildFileFakeFileSystem(
'image.s01', 1, expected_segment_file_path_specs)
# Test single segment file: s01.
path_spec = fake_path_spec.FakePathSpec(location='/image.s01')
path_spec = ewf_path_spec.EWFPathSpec(parent=path_spec)
segment_file_path_specs = ewf.EWFGlobPathSpec(file_system, path_spec)
self.assertEqual(
len(segment_file_path_specs), len(expected_segment_file_path_specs))
self.assertEqual(
segment_file_path_specs, expected_segment_file_path_specs)
# Test non exiting segment file: s01.
expected_segment_file_path_specs = []
path_spec = fake_path_spec.FakePathSpec(location='/bogus.s01')
path_spec = ewf_path_spec.EWFPathSpec(parent=path_spec)
segment_file_path_specs = ewf.EWFGlobPathSpec(file_system, path_spec)
self.assertEqual(
len(segment_file_path_specs), len(expected_segment_file_path_specs))
self.assertEqual(
segment_file_path_specs, expected_segment_file_path_specs)
# Test multiple segment files: s01-s10.
expected_segment_file_path_specs = []
file_system = self._BuildFileFakeFileSystem(
'image.s01', 10, expected_segment_file_path_specs)
path_spec = fake_path_spec.FakePathSpec(location='/image.s01')
path_spec = ewf_path_spec.EWFPathSpec(parent=path_spec)
segment_file_path_specs = ewf.EWFGlobPathSpec(file_system, path_spec)
self.assertEqual(
len(segment_file_path_specs), len(expected_segment_file_path_specs))
self.assertEqual(
segment_file_path_specs, expected_segment_file_path_specs)
# Test multiple segment files: s01-s99,saa.
expected_segment_file_path_specs = []
file_system = self._BuildFileFakeFileSystem(
'image.s01', 100, expected_segment_file_path_specs)
path_spec = fake_path_spec.FakePathSpec(location='/image.s01')
path_spec = ewf_path_spec.EWFPathSpec(parent=path_spec)
segment_file_path_specs = ewf.EWFGlobPathSpec(file_system, path_spec)
self.assertEqual(
len(segment_file_path_specs), len(expected_segment_file_path_specs))
self.assertEqual(
segment_file_path_specs, expected_segment_file_path_specs)
# Test multiple segment files: s01-s99,saa-sba.
expected_segment_file_path_specs = []
file_system = self._BuildFileFakeFileSystem(
'image.s01', 126, expected_segment_file_path_specs)
path_spec = fake_path_spec.FakePathSpec(location='/image.s01')
path_spec = ewf_path_spec.EWFPathSpec(parent=path_spec)
segment_file_path_specs = ewf.EWFGlobPathSpec(file_system, path_spec)
self.assertEqual(
len(segment_file_path_specs), len(expected_segment_file_path_specs))
self.assertEqual(
segment_file_path_specs, expected_segment_file_path_specs)
# Test multiple segment files: s01-s99,saa-szz.
expected_segment_file_path_specs = []
file_system = self._BuildFileFakeFileSystem(
'image.s01', 775, expected_segment_file_path_specs)
path_spec = fake_path_spec.FakePathSpec(location='/image.s01')
path_spec = ewf_path_spec.EWFPathSpec(parent=path_spec)
segment_file_path_specs = ewf.EWFGlobPathSpec(file_system, path_spec)
self.assertEqual(
len(segment_file_path_specs), len(expected_segment_file_path_specs))
self.assertEqual(
segment_file_path_specs, expected_segment_file_path_specs)
# Test multiple segment files: s01-s99,saa-zzz.
expected_segment_file_path_specs = []
file_system = self._BuildFileFakeFileSystem(
'image.s01', 5506, expected_segment_file_path_specs)
path_spec = fake_path_spec.FakePathSpec(location='/image.s01')
path_spec = ewf_path_spec.EWFPathSpec(parent=path_spec)
segment_file_path_specs = ewf.EWFGlobPathSpec(file_system, path_spec)
self.assertEqual(
len(segment_file_path_specs), len(expected_segment_file_path_specs))
self.assertEqual(
segment_file_path_specs, expected_segment_file_path_specs)
# Test multiple segment files: E01-E99,EAA-[ZZ.
expected_segment_file_path_specs = []
file_system = self._BuildFileFakeFileSystem(
'image.s01', 5507, expected_segment_file_path_specs)
path_spec = fake_path_spec.FakePathSpec(location='/image.s01')
path_spec = ewf_path_spec.EWFPathSpec(parent=path_spec)
with self.assertRaises(RuntimeError):
segment_file_path_specs = ewf.EWFGlobPathSpec(file_system, path_spec)
if __name__ == '__main__':
unittest.main()
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