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import arpy
import unittest, os, io
class ArContents(unittest.TestCase):
def test_archive_contents(self):
ar = arpy.Archive(os.path.join(os.path.dirname(__file__), 'contents.ar'))
ar.read_all_headers()
f1_contents = ar.archived_files[b'file1'].read()
f2_contents = ar.archived_files[b'file2'].read()
self.assertEqual(b'test_in_file_1\n', f1_contents)
self.assertEqual(b'test_in_file_2\n', f2_contents)
ar.close()
class ArContentsSeeking(unittest.TestCase):
def setUp(self):
self.ar = arpy.Archive(os.path.join(os.path.dirname(__file__), 'contents.ar'))
self.ar.read_all_headers()
self.f1 = self.ar.archived_files[b'file1']
def tearDown(self):
self.ar.close()
def test_content_opens_at_zero(self):
self.assertEqual(0, self.f1.tell())
def test_seek_absolute(self):
contents_before = self.f1.read()
self.f1.seek(0)
contents_after = self.f1.read()
self.f1.seek(3)
contents_shifted = self.f1.read()
self.assertEqual(contents_before, contents_after)
self.assertEqual(contents_before[3:], contents_shifted)
def test_seek_relative(self):
contents_before = self.f1.read()
self.f1.seek(1)
self.f1.seek(1, 1)
contents_after = self.f1.read()
self.assertEqual(contents_before[2:], contents_after)
def test_seek_from_end(self):
contents_before = self.f1.read()
self.f1.seek(-4, 2)
contents_after = self.f1.read()
self.assertEqual(contents_before[-4:], contents_after)
def test_seek_failure(self):
self.assertRaises(arpy.ArchiveAccessError, self.f1.seek, 10, 10)
def test_seek_position_failure(self):
self.assertRaises(arpy.ArchiveAccessError, self.f1.seek, -1)
class NonSeekableIO(io.BytesIO):
def seek(self, *args):
raise Exception("Not seekable")
def seekable(self):
return False
def force_seek(self, *args):
io.BytesIO.seek(self, *args)
class ArContentsNoSeeking(unittest.TestCase):
def setUp(self):
big_archive = NonSeekableIO()
big_archive.write(b"!<arch>\n")
big_archive.write(b"file1/ 1364071329 1000 100 100644 5000 `\n")
big_archive.write(b" "*5000)
big_archive.write(b"file2/ 1364071329 1000 100 100644 2 `\n")
big_archive.write(b"xx")
big_archive.force_seek(0)
self.big_archive = big_archive
def test_stream_read(self):
# make sure all contents can be read without seeking
ar = arpy.Archive(fileobj=self.big_archive)
f = ar.next()
contents = f.read()
self.assertEqual(b'file1', f.header.name)
self.assertEqual(b' '*5000, contents)
f = ar.next()
contents = f.read()
self.assertEqual(b'file2', f.header.name)
self.assertEqual(b'xx', contents)
ar.close()
def test_stream_skip_file(self):
# make sure skipping contents is possible without seeking
ar = arpy.Archive(fileobj=self.big_archive)
f = ar.next()
self.assertEqual(b'file1', f.header.name)
f = ar.next()
contents = f.read()
self.assertEqual(b'file2', f.header.name)
self.assertEqual(b'xx', contents)
ar.close()
def test_seek_fail(self):
ar = arpy.Archive(fileobj=self.big_archive)
f1 = ar.next()
f2 = ar.next()
self.assertRaises(arpy.ArchiveAccessError, f1.read)
ar.close()
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