def _unzipIterChunkyTest(self, compression, chunksize, lower, upper):
"""
unzipIterChunky should unzip the given number of bytes per iteration.
"""
junk = ' '.join([str(random.random()) for n in xrange(1000)])
junkmd5 = md5(junk).hexdigest()
tempdir = filepath.FilePath(self.mktemp())
tempdir.makedirs()
zfpath = tempdir.child('bigfile.zip').path
self._makebigfile(zfpath, compression, junk)
uziter = zipstream.unzipIterChunky(zfpath, tempdir.path,
chunksize=chunksize)
r = uziter.next()
# test that the number of chunks is in the right ballpark;
# this could theoretically be any number but statistically it
# should always be in this range
approx = lower < r < upper
self.failUnless(approx)
for r in uziter:
pass
self.assertEqual(r, 0)
newmd5 = md5(
tempdir.child("zipstreamjunk").open().read()).hexdigest()
self.assertEqual(newmd5, junkmd5)
def test_unzipIterChunky(self):
"""
L{twisted.python.zipstream.unzipIterChunky} returns an iterator which
must be exhausted to completely unzip the input archive.
"""
numfiles = 10
contents = ['This is test file %d!' % i for i in range(numfiles)]
zpfilename = self.makeZipFile(contents)
list(zipstream.unzipIterChunky(zpfilename, self.unzipdir.path))
self.assertEquals(
set(self.unzipdir.listdir()),
set(map(str, range(numfiles))))
for child in self.unzipdir.children():
num = int(child.basename())
self.assertEquals(child.getContent(), contents[num])
def test_unzipIterChunkyDirectory(self):
"""
The path to which a file is extracted by L{zipstream.unzipIterChunky}
is determined by joining the C{directory} argument to C{unzip} with the
path within the archive of the file being extracted.
"""
numfiles = 10
contents = ['This is test file %d!' % i for i in range(numfiles)]
zpfilename = self.makeZipFile(contents, 'foo')
list(zipstream.unzipIterChunky(zpfilename, self.unzipdir.path))
self.assertEquals(
set(self.unzipdir.child('foo').listdir()),
set(map(str, range(numfiles))))
for child in self.unzipdir.child('foo').children():
num = int(child.basename())
self.assertEquals(child.getContent(), contents[num])