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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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"""Tests from HTTP response parsing."""
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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"""Tests from HTTP response parsing.
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The handle_response method read the response body of a GET request an returns
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the corresponding RangeFile.
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There are four different kinds of RangeFile:
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- a whole file whose size is unknown, seen as a simple byte stream,
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- a whole file whose size is known, we can't read past its end,
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- a single range file, a part of a file with a start and a size,
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- a multiple range file, several consecutive parts with known start offset
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Some properties are common to all kinds:
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- seek can only be forward (its really a socket underneath),
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- read can't cross ranges,
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- successive ranges are taken into account transparently,
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- the expected pattern of use is either seek(offset)+read(size) or a single
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read with no size specified. For multiple range files, multiple read() will
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return the corresponding ranges, trying to read further will raise
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from cStringIO import StringIO
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from bzrlib import errors
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from bzrlib.transport import http
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from bzrlib.transport.http import response
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from bzrlib.tests import TestCase
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class TestResponseRange(TestCase):
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"""Test the ResponseRange class."""
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RR = response.ResponseRange
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self.assertTrue(r1 < r2)
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self.assertFalse(r1 > r2)
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self.assertTrue(r1 < 5)
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self.assertFalse(r2 < 5)
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self.assertEqual(RR(0, 10, 5), RR(0, 10, 5))
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self.assertNotEqual(RR(0, 10, 5), RR(0, 8, 5))
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self.assertNotEqual(RR(0, 10, 5), RR(0, 10, 6))
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def test_sort_list(self):
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"""Ensure longer ranges are sorted after shorter ones"""
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RR = response.ResponseRange
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lst = [RR(3, 8, 0), 5, RR(3, 7, 0), 6]
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self.assertEqual([RR(3,7,0), RR(3,8,0), 5, 6], lst)
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class TestRangeFile(TestCase):
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content = "abcdefghijklmnopqrstuvwxyz"
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self.fp = response.RangeFile('foo', StringIO(content))
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self.fp._add_range(0, 9, 0)
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self.fp._add_range(20, 29, 10)
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self.fp._add_range(30, 39, 15)
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def test_valid_accesses(self):
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"""Test so that valid accesses work to the file."""
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self.assertEquals(self.fp.read(3), 'abc')
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self.assertEquals(self.fp.read(3), 'def')
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self.assertEquals(self.fp.tell(), 6)
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self.assertEquals(self.fp.read(3), 'klm')
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self.assertEquals(self.fp.read(2), 'no')
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self.assertEquals(self.fp.tell(), 25)
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# should wrap over to 30-39 entity
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self.assertEquals(self.fp.read(3), 'pqr')
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self.assertEquals(self.fp.read(3), 'def')
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self.assertEquals(self.fp.tell(), 6)
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def test_invalid_accesses(self):
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"""Test so that invalid accesses trigger errors."""
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self.assertRaises(errors.InvalidRange, self.fp.read, 2)
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self.assertRaises(errors.InvalidRange, self.fp.read, 2)
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self.assertRaises(errors.InvalidRange, self.fp.read, 2)
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def test__finish_ranges(self):
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"""Test that after RangeFile._finish_ranges the list is sorted."""
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self.fp._add_range(1, 2, 3)
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self.fp._add_range(8, 9, 10)
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self.fp._add_range(3, 4, 5)
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# TODO: jam 20060706 If we switch to inserting
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# in sorted order, remove this test
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self.assertNotEqual(self.fp._ranges, sorted(self.fp._ranges))
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self.fp._finish_ranges()
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self.assertEqual(self.fp._ranges, sorted(self.fp._ranges))
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def test_seek_and_tell(self):
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# Check for seeking before start
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self.assertEqual(0, self.fp.tell())
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self.assertEqual(5, self.fp.tell())
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self.assertEqual(3, self.fp.tell())
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# TODO: jam 20060706 following tests will fail if this
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# is not true, and would be difficult to debug
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# but it is a layering violation
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self.assertEqual(39, self.fp._len)
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self.assertEqual(39, self.fp.tell())
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self.assertEqual(29, self.fp.tell())
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self.assertRaises(ValueError, self.fp.seek, 0, 4)
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self.assertRaises(ValueError, self.fp.seek, 0, -1)
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class TestRegexes(TestCase):
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def assertRegexMatches(self, groups, text):
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"""Check that the regex matches and returns the right values"""
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m = self.regex.match(text)
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self.assertNotEqual(None, m, "text %s did not match regex" % (text,))
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self.assertEqual(groups, m.groups())
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def test_range_re(self):
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"""Test that we match valid ranges."""
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self.regex = response.HttpRangeResponse._CONTENT_RANGE_RE
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self.assertRegexMatches(('bytes', '1', '10', '11'),
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self.assertRegexMatches(('bytes', '1', '10', '11'),
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self.assertRegexMatches(('bytes', '2123', '4242', '1231'),
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'\tbytes 2123-4242/1231 ')
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self.assertRegexMatches(('chars', '1', '2', '3'),
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def test_content_type_re(self):
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self.regex = response.HttpMultipartRangeResponse._CONTENT_TYPE_RE
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self.assertRegexMatches(('xxyyzz',),
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'multipart/byteranges; boundary = xxyyzz')
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self.assertRegexMatches(('xxyyzz',),
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'multipart/byteranges;boundary=xxyyzz')
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self.assertRegexMatches(('xx yy zz',),
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' multipart/byteranges ; boundary= xx yy zz ')
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self.assertEqual(None,
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self.regex.match('multipart byteranges;boundary=xx'))
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Content-range: bytes 1-10/20\r
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Content-Range: bytes 21-30/20\r
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content-range: bytes 41-50/20\r
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content-range: bytes 51-60/20\r
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class TestHelpers(TestCase):
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"""Test the helper functions"""
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def test__parse_range(self):
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"""Test that _parse_range acts reasonably."""
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content = StringIO('')
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parse_range = response.HttpRangeResponse._parse_range
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self.assertEqual((1,2), parse_range('bytes 1-2/3'))
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self.assertEqual((10,20), parse_range('bytes 10-20/2'))
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self.assertRaises(errors.InvalidHttpRange, parse_range, 'char 1-3/2')
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self.assertRaises(errors.InvalidHttpRange, parse_range, 'bytes a-3/2')
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parse_range('bytes x-10/3', path='http://foo/bar')
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except errors.InvalidHttpRange, e:
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self.assertContainsRe(str(e), 'http://foo/bar')
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self.assertContainsRe(str(e), 'bytes x-10/3')
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self.fail('Did not raise InvalidHttpRange')
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def test__parse_boundary_simple(self):
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"""Test that _parse_boundary handles Content-type properly"""
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parse_boundary = response.HttpMultipartRangeResponse._parse_boundary
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m = parse_boundary(' multipart/byteranges; boundary=xxyyzz')
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self.assertNotEqual(None, m)
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# Check that the returned regex is capable of splitting simple_data
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matches = list(m.finditer(simple_data))
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self.assertEqual(4, len(matches))
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# match.group() should be the content-range entry
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# and match.end() should be the start of the content
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self.assertEqual(' bytes 1-10/20', matches[0].group(1))
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self.assertEqual(simple_data.find('1234567890'), matches[0].end())
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self.assertEqual(' bytes 21-30/20', matches[1].group(1))
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self.assertEqual(simple_data.find('abcdefghij'), matches[1].end())
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self.assertEqual(' bytes 41-50/20', matches[2].group(1))
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self.assertEqual(simple_data.find('zyxwvutsrq'), matches[2].end())
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self.assertEqual(' bytes 51-60/20', matches[3].group(1))
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self.assertEqual(simple_data.find('xxyyzz fbd'), matches[3].end())
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def test__parse_boundary_invalid(self):
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parse_boundary = response.HttpMultipartRangeResponse._parse_boundary
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parse_boundary(' multipart/bytes;boundary=xxyyzz',
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path='http://foo/bar')
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except errors.InvalidHttpContentType, e:
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self.assertContainsRe(str(e), 'http://foo/bar')
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self.assertContainsRe(str(e), 'multipart/bytes;boundary=xxyyzz')
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self.fail('Did not raise InvalidHttpContentType')
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class TestHttpRangeResponse(TestCase):
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def test_smoketest(self):
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"""A basic test that HttpRangeResponse is reasonable."""
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content = StringIO('0123456789')
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f = response.HttpRangeResponse('http://foo', 'bytes 1-10/9', content)
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self.assertEqual([response.ResponseRange(1,10,0)], f._ranges)
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from bzrlib.transport.http import (
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from bzrlib.tests.file_utils import (
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class ReadSocket(object):
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"""A socket-like object that can be given a predefined content."""
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def __init__(self, data):
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self.readfile = StringIO(data)
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def makefile(self, mode='r', bufsize=None):
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class FakeHTTPConnection(_urllib2_wrappers.HTTPConnection):
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def __init__(self, sock):
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_urllib2_wrappers.HTTPConnection.__init__(self, 'localhost')
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# Set the socket to bypass the connection
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"""Ignores the writes on the socket."""
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class TestHTTPConnection(tests.TestCase):
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def test_cleanup_pipe(self):
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sock = ReadSocket("""HTTP/1.1 200 OK\r
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Content-Type: text/plain; charset=UTF-8\r
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conn = FakeHTTPConnection(sock)
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# Simulate the request sending so that the connection will be able to
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conn.putrequest('GET', 'http://localhost/fictious')
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# Now, get the response
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resp = conn.getresponse()
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# Read part of the response
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self.assertEquals('0123456789\n', resp.read(11))
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# Override the thresold to force the warning emission
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conn._range_warning_thresold = 6 # There are 7 bytes pending
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self.assertContainsRe(self.get_log(), 'Got a 200 response when asking')
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class TestRangeFileMixin(object):
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"""Tests for accessing the first range in a RangeFile."""
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# A simple string used to represent a file part (also called a range), in
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# which offsets are easy to calculate for test writers. It's used as a
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# building block with slight variations but basically 'a' is the first char
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# of the range and 'z' is the last.
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alpha = 'abcdefghijklmnopqrstuvwxyz'
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def test_can_read_at_first_access(self):
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"""Test that the just created file can be read."""
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self.assertEquals(self.alpha, self._file.read())
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def test_seek_read(self):
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"""Test seek/read inside the range."""
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start = self.first_range_start
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# Before any use, tell() should be at the range start
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self.assertEquals(start, f.tell())
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cur = start # For an overall offset assertion
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self.assertEquals('def', f.read(3))
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self.assertEquals('klmn', f.read(4))
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# read(0) in the middle of a range
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self.assertEquals('', f.read(0))
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self.assertEquals(here, f.tell())
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self.assertEquals(cur, f.tell())
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def test_read_zero(self):
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start = self.first_range_start
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self.assertEquals('', f.read(0))
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self.assertEquals('', f.read(0))
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def test_seek_at_range_end(self):
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def test_read_at_range_end(self):
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"""Test read behaviour at range end."""
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self.assertEquals(self.alpha, f.read())
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self.assertEquals('', f.read(0))
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self.assertRaises(errors.InvalidRange, f.read, 1)
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def test_unbounded_read_after_seek(self):
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# Should not cross ranges
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self.assertEquals('yz', f.read())
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def test_seek_backwards(self):
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start = self.first_range_start
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self.assertRaises(errors.InvalidRange, f.seek, start + 5)
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def test_seek_outside_single_range(self):
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if f._size == -1 or f._boundary is not None:
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raise tests.TestNotApplicable('Needs a fully defined range')
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# Will seek past the range and then errors out
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self.assertRaises(errors.InvalidRange,
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f.seek, self.first_range_start + 27)
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def test_read_past_end_of_range(self):
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raise tests.TestNotApplicable("Can't check an unknown size")
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start = self.first_range_start
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self.assertRaises(errors.InvalidRange, f.read, 10)
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def test_seek_from_end(self):
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"""Test seeking from the end of the file.
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The semantic is unclear in case of multiple ranges. Seeking from end
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exists only for the http transports, cannot be used if the file size is
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unknown and is not used in bzrlib itself. This test must be (and is)
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overridden by daughter classes.
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Reading from end makes sense only when a range has been requested from
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the end of the file (see HttpTransportBase._get() when using the
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'tail_amount' parameter). The HTTP response can only be a whole file or
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self.assertEquals('yz', f.read())
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class TestRangeFileSizeUnknown(tests.TestCase, TestRangeFileMixin):
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"""Test a RangeFile for a whole file whose size is not known."""
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super(TestRangeFileSizeUnknown, self).setUp()
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self._file = response.RangeFile('Whole_file_size_known',
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StringIO(self.alpha))
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# We define no range, relying on RangeFile to provide default values
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self.first_range_start = 0 # It's the whole file
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def test_seek_from_end(self):
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"""See TestRangeFileMixin.test_seek_from_end.
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The end of the file can't be determined since the size is unknown.
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self.assertRaises(errors.InvalidRange, self._file.seek, -1, 2)
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def test_read_at_range_end(self):
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"""Test read behaviour at range end."""
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self.assertEquals(self.alpha, f.read())
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self.assertEquals('', f.read(0))
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self.assertEquals('', f.read(1))
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class TestRangeFileSizeKnown(tests.TestCase, TestRangeFileMixin):
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"""Test a RangeFile for a whole file whose size is known."""
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super(TestRangeFileSizeKnown, self).setUp()
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self._file = response.RangeFile('Whole_file_size_known',
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StringIO(self.alpha))
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self._file.set_range(0, len(self.alpha))
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self.first_range_start = 0 # It's the whole file
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class TestRangeFileSingleRange(tests.TestCase, TestRangeFileMixin):
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"""Test a RangeFile for a single range."""
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super(TestRangeFileSingleRange, self).setUp()
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self._file = response.RangeFile('Single_range_file',
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StringIO(self.alpha))
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self.first_range_start = 15
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self._file.set_range(self.first_range_start, len(self.alpha))
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def test_read_before_range(self):
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# This can't occur under normal circumstances, we have to force it
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f._pos = 0 # Force an invalid pos
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self.assertRaises(errors.InvalidRange, f.read, 2)
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class TestRangeFileMultipleRanges(tests.TestCase, TestRangeFileMixin):
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"""Test a RangeFile for multiple ranges.
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The RangeFile used for the tests contains three ranges:
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- at offset 25: alpha
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- at offset 100: alpha
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- at offset 126: alpha.upper()
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The two last ranges are contiguous. This only rarely occurs (should not in
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fact) in real uses but may lead to hard to track bugs.
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# The following is used to represent the boundary paramter defined
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# in HTTP response headers and the boundary lines that separate
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boundary = "separation"
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super(TestRangeFileMultipleRanges, self).setUp()
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boundary = self.boundary
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self.first_range_start = 25
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file_size = 200 # big enough to encompass all ranges
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for (start, part) in [(self.first_range_start, self.alpha),
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# Two contiguous ranges
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(126, self.alpha.upper())]:
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content += self._multipart_byterange(part, start, boundary,
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content += self._boundary_line()
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self._file = response.RangeFile('Multiple_ranges_file',
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self.set_file_boundary()
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def _boundary_line(self):
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"""Helper to build the formatted boundary line."""
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return '--' + self.boundary + '\r\n'
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def set_file_boundary(self):
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# Ranges are set by decoding the range headers, the RangeFile user is
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# supposed to call the following before using seek or read since it
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# requires knowing the *response* headers (in that case the boundary
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# which is part of the Content-Type header).
306
self._file.set_boundary(self.boundary)
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def _multipart_byterange(self, data, offset, boundary, file_size='*'):
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"""Encode a part of a file as a multipart/byterange MIME type.
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When a range request is issued, the HTTP response body can be
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decomposed in parts, each one representing a range (start, size) in a
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:param data: The payload.
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:param offset: where data starts in the file
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:param boundary: used to separate the parts
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:param file_size: the size of the file containing the range (default to
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:return: a string containing the data encoded as it will appear in the
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bline = self._boundary_line()
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# Each range begins with a boundary line
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# A range is described by a set of headers, but only 'Content-Range' is
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# required for our implementation (TestHandleResponse below will
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# exercise ranges with multiple or missing headers')
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range += 'Content-Range: bytes %d-%d/%d\r\n' % (offset,
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# Finally the raw bytes
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def test_read_all_ranges(self):
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self.assertEquals(self.alpha, f.read()) # Read first range
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f.seek(100) # Trigger the second range recognition
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self.assertEquals(self.alpha, f.read()) # Read second range
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self.assertEquals(126, f.tell())
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f.seek(126) # Start of third range which is also the current pos !
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self.assertEquals('A', f.read(1))
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self.assertEquals('LMN', f.read(3))
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def test_seek_from_end(self):
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"""See TestRangeFileMixin.test_seek_from_end."""
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# The actual implementation will seek from end for the first range only
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# and then fail. Since seeking from end is intended to be used for a
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# single range only anyway, this test just document the actual
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self.assertEquals('yz', f.read())
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self.assertRaises(errors.InvalidRange, f.seek, -2, 2)
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def test_seek_into_void(self):
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start = self.first_range_start
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# Seeking to a point between two ranges is possible (only once) but
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# reading there is forbidden
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# We crossed a range boundary, so now the file is positioned at the
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# start of the new range (i.e. trying to seek below 100 will error out)
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def test_seek_across_ranges(self):
374
start = self.first_range_start
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f.seek(126) # skip the two first ranges
376
self.assertEquals('AB', f.read(2))
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def test_checked_read_dont_overflow_buffers(self):
380
start = self.first_range_start
381
# We force a very low value to exercise all code paths in _checked_read
382
f._discarded_buf_size = 8
383
f.seek(126) # skip the two first ranges
384
self.assertEquals('AB', f.read(2))
386
def test_seek_twice_between_ranges(self):
388
start = self.first_range_start
389
f.seek(start + 40) # Past the first range but before the second
390
# Now the file is positioned at the second range start (100)
391
self.assertRaises(errors.InvalidRange, f.seek, start + 41)
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def test_seek_at_range_end(self):
394
"""Test seek behavior at range end."""
400
def test_read_at_range_end(self):
402
self.assertEquals(self.alpha, f.read())
403
self.assertEquals(self.alpha, f.read())
404
self.assertEquals(self.alpha.upper(), f.read())
405
self.assertRaises(errors.InvalidHttpResponse, f.read, 1)
408
class TestRangeFileMultipleRangesQuotedBoundaries(TestRangeFileMultipleRanges):
409
"""Perform the same tests as TestRangeFileMultipleRanges, but uses
410
an angle-bracket quoted boundary string like IIS 6.0 and 7.0
411
(but not IIS 5, which breaks the RFC in a different way
412
by using square brackets, not angle brackets)
414
This reveals a bug caused by
416
- The bad implementation of RFC 822 unquoting in Python (angles are not
417
quotes), coupled with
419
- The bad implementation of RFC 2046 in IIS (angles are not permitted chars
423
# The boundary as it appears in boundary lines
424
# IIS 6 and 7 use this value
425
_boundary_trimmed = "q1w2e3r4t5y6u7i8o9p0zaxscdvfbgnhmjklkl"
426
boundary = '<' + _boundary_trimmed + '>'
428
def set_file_boundary(self):
429
# Emulate broken rfc822.unquote() here by removing angles
430
self._file.set_boundary(self._boundary_trimmed)
433
class TestRangeFileVarious(tests.TestCase):
434
"""Tests RangeFile aspects not covered elsewhere."""
436
def test_seek_whence(self):
437
"""Test the seek whence parameter values."""
438
f = response.RangeFile('foo', StringIO('abc'))
243
self.assertRaises(errors.InvalidRange, f.read, 2)
245
self.assertEqual('012345', f.read(6))
247
def test_invalid(self):
249
f = response.HttpRangeResponse('http://foo', 'bytes x-10/9',
250
StringIO('0123456789'))
251
except errors.InvalidHttpRange, e:
252
self.assertContainsRe(str(e), 'http://foo')
253
self.assertContainsRe(str(e), 'bytes x-10/9')
255
self.fail('Failed to raise InvalidHttpRange')
258
class TestHttpMultipartRangeResponse(TestCase):
259
"""Test the handling of multipart range responses"""
261
def test_simple(self):
262
content = StringIO(simple_data)
263
multi = response.HttpMultipartRangeResponse('http://foo',
264
'multipart/byteranges; boundary = xxyyzz', content)
266
self.assertEqual(4, len(multi._ranges))
269
self.assertEqual('1234567890', multi.read(10))
271
self.assertEqual('abcdefghij', multi.read(10))
273
self.assertEqual('zyxwvutsrq', multi.read(10))
275
self.assertEqual('xxyyzz fbd', multi.read(10))
276
# TODO: jam 20060706 Currently RangeFile does not support
277
# reading across ranges. Consider adding it.
279
# self.assertEqual('zyxwvutsrqxxyyzz fbd', multi.read(20))
280
self.assertRaises(errors.InvalidRange, multi.read, 20)
283
self.assertRaises(errors.InvalidRange, multi.read, 11)
285
self.assertRaises(errors.InvalidRange, multi.read, 10)
287
def test_invalid(self):
288
content = StringIO('')
290
response.HttpMultipartRangeResponse('http://foo',
291
'multipart/byte;boundary=invalid', content)
292
except errors.InvalidHttpContentType, e:
293
self.assertContainsRe(str(e), 'http://foo')
294
self.assertContainsRe(str(e), 'multipart/byte;')
443
self.assertRaises(ValueError, f.seek, 0, 14)
445
def test_range_syntax(self):
446
"""Test the Content-Range scanning."""
448
f = response.RangeFile('foo', StringIO())
450
def ok(expected, header_value):
451
f.set_range_from_header(header_value)
452
# Slightly peek under the covers to get the size
453
self.assertEquals(expected, (f.tell(), f._size))
455
ok((1, 10), 'bytes 1-10/11')
456
ok((1, 10), 'bytes 1-10/*')
457
ok((12, 2), '\tbytes 12-13/*')
458
ok((28, 1), ' bytes 28-28/*')
459
ok((2123, 2120), 'bytes 2123-4242/12310')
460
ok((1, 10), 'bytes 1-10/ttt') # We don't check total (ttt)
462
def nok(header_value):
463
self.assertRaises(errors.InvalidHttpRange,
464
f.set_range_from_header, header_value)
468
nok('bytes xx-yyy/zzz')
469
nok('bytes xx-12/zzz')
470
nok('bytes 11-yy/zzz')
297
474
# Taken from real request responses
749
def test_multi_squid_range(self):
750
out = self.get_response(_multipart_squid_range_response)
752
# Just make sure we can read the right contents
497
759
def test_invalid_response(self):
498
760
self.assertRaises(errors.InvalidHttpResponse,
499
self.get_response, _invalid_response)
761
self.get_response, _invalid_response)
501
763
def test_full_text_no_content_type(self):
502
764
# We should not require Content-Type for a full response
503
a_response = _full_text_response
504
headers = http._extract_headers(StringIO(a_response[1]))
505
del headers['Content-Type']
506
out = response.handle_response('http://foo', a_response[0], headers,
507
StringIO(a_response[2]))
508
self.assertEqual(_full_text_response[2], out.read())
510
def test_missing_no_content_type(self):
511
# Without Content-Type we should still raise NoSuchFile on a 404
512
a_response = _missing_response
513
headers = http._extract_headers(StringIO(a_response[1]))
514
del headers['Content-Type']
515
self.assertRaises(errors.NoSuchFile,
516
response.handle_response, 'http://missing', a_response[0], headers,
517
StringIO(a_response[2]))
519
def test_missing_content_type(self):
520
a_response = _single_range_response
521
headers = http._extract_headers(StringIO(a_response[1]))
522
del headers['Content-Type']
523
self.assertRaises(errors.InvalidHttpContentType,
524
response.handle_response, 'http://nocontent', a_response[0],
525
headers, StringIO(a_response[2]))
765
code, raw_headers, body = _full_text_response_no_content_type
766
msg = self._build_HTTPMessage(raw_headers)
767
out = response.handle_response('http://foo', code, msg, StringIO(body))
768
self.assertEqual(body, out.read())
770
def test_full_text_no_content_length(self):
771
code, raw_headers, body = _full_text_response_no_content_length
772
msg = self._build_HTTPMessage(raw_headers)
773
out = response.handle_response('http://foo', code, msg, StringIO(body))
774
self.assertEqual(body, out.read())
527
776
def test_missing_content_range(self):
528
a_response = _single_range_response
529
headers = http._extract_headers(StringIO(a_response[1]))
530
del headers['Content-Range']
531
self.assertRaises(errors.InvalidHttpResponse,
532
response.handle_response, 'http://nocontent', a_response[0],
533
headers, StringIO(a_response[2]))
777
code, raw_headers, body = _single_range_no_content_range
778
msg = self._build_HTTPMessage(raw_headers)
779
self.assertRaises(errors.InvalidHttpResponse,
780
response.handle_response,
781
'http://bogus', code, msg, StringIO(body))
783
def test_multipart_no_content_range(self):
784
code, raw_headers, body = _multipart_no_content_range
785
msg = self._build_HTTPMessage(raw_headers)
786
self.assertRaises(errors.InvalidHttpResponse,
787
response.handle_response,
788
'http://bogus', code, msg, StringIO(body))
790
def test_multipart_no_boundary(self):
791
out = self.get_response(_multipart_no_boundary)
792
out.read() # Read the whole range
793
# Fail to find the boundary line
794
self.assertRaises(errors.InvalidHttpResponse, out.seek, 1, 1)
797
class TestRangeFileSizeReadLimited(tests.TestCase):
798
"""Test RangeFile _max_read_size functionality which limits the size of
799
read blocks to prevent MemoryError messages in socket.recv.
803
super(TestRangeFileSizeReadLimited, self).setUp()
804
# create a test datablock larger than _max_read_size.
805
chunk_size = response.RangeFile._max_read_size
806
test_pattern = '0123456789ABCDEF'
807
self.test_data = test_pattern * (3 * chunk_size / len(test_pattern))
808
self.test_data_len = len(self.test_data)
810
def test_max_read_size(self):
811
"""Read data in blocks and verify that the reads are not larger than
812
the maximum read size.
814
# retrieve data in large blocks from response.RangeFile object
815
mock_read_file = FakeReadFile(self.test_data)
816
range_file = response.RangeFile('test_max_read_size', mock_read_file)
817
response_data = range_file.read(self.test_data_len)
819
# verify read size was equal to the maximum read size
820
self.assertTrue(mock_read_file.get_max_read_size() > 0)
821
self.assertEqual(mock_read_file.get_max_read_size(),
822
response.RangeFile._max_read_size)
823
self.assertEqual(mock_read_file.get_read_count(), 3)
825
# report error if the data wasn't equal (we only report the size due
826
# to the length of the data)
827
if response_data != self.test_data:
828
message = "Data not equal. Expected %d bytes, received %d."
829
self.fail(message % (len(response_data), self.test_data_len))
added
removed
bzrlib/tests/test_http_response.py
