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test_content.py
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test_content.py
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from unittest import mock
from twisted.python.failure import Failure
from twisted.trial.unittest import TestCase
from twisted.web.http_headers import Headers
from twisted.web.client import ResponseDone, ResponseFailed
from twisted.web.http import PotentialDataLoss
from treq import collect, content, json_content, text_content
from treq.client import _BufferedResponse
class ContentTests(TestCase):
def setUp(self):
self.response = mock.Mock()
self.protocol = None
def deliverBody(protocol):
self.protocol = protocol
self.response.deliverBody.side_effect = deliverBody
self.response = _BufferedResponse(self.response)
def test_collect(self):
data = []
d = collect(self.response, data.append)
self.protocol.dataReceived(b'{')
self.protocol.dataReceived(b'"msg": "hell')
self.protocol.dataReceived(b'o"}')
self.protocol.connectionLost(Failure(ResponseDone()))
self.assertEqual(self.successResultOf(d), None)
self.assertEqual(data, [b'{', b'"msg": "hell', b'o"}'])
def test_collect_failure(self):
data = []
d = collect(self.response, data.append)
self.protocol.dataReceived(b'foo')
self.protocol.connectionLost(Failure(ResponseFailed("test failure")))
self.failureResultOf(d, ResponseFailed)
self.assertEqual(data, [b'foo'])
def test_collect_failure_potential_data_loss(self):
"""
PotentialDataLoss failures are treated as success.
"""
data = []
d = collect(self.response, data.append)
self.protocol.dataReceived(b'foo')
self.protocol.connectionLost(Failure(PotentialDataLoss()))
self.assertEqual(self.successResultOf(d), None)
self.assertEqual(data, [b'foo'])
def test_collect_0_length(self):
self.response.length = 0
d = collect(
self.response,
lambda d: self.fail("Unexpectedly called with: {0}".format(d)))
self.assertEqual(self.successResultOf(d), None)
def test_content(self):
d = content(self.response)
self.protocol.dataReceived(b'foo')
self.protocol.dataReceived(b'bar')
self.protocol.connectionLost(Failure(ResponseDone()))
self.assertEqual(self.successResultOf(d), b'foobar')
def test_content_cached(self):
d1 = content(self.response)
self.protocol.dataReceived(b'foo')
self.protocol.dataReceived(b'bar')
self.protocol.connectionLost(Failure(ResponseDone()))
self.assertEqual(self.successResultOf(d1), b'foobar')
def _fail_deliverBody(protocol):
self.fail("deliverBody unexpectedly called.")
self.response.original.deliverBody.side_effect = _fail_deliverBody
d3 = content(self.response)
self.assertEqual(self.successResultOf(d3), b'foobar')
self.assertNotIdentical(d1, d3)
def test_content_multiple_waiters(self):
d1 = content(self.response)
d2 = content(self.response)
self.protocol.dataReceived(b'foo')
self.protocol.connectionLost(Failure(ResponseDone()))
self.assertEqual(self.successResultOf(d1), b'foo')
self.assertEqual(self.successResultOf(d2), b'foo')
self.assertNotIdentical(d1, d2)
def test_json_content(self):
self.response.headers = Headers()
d = json_content(self.response)
self.protocol.dataReceived(b'{"msg":"hello!"}')
self.protocol.connectionLost(Failure(ResponseDone()))
self.assertEqual(self.successResultOf(d), {"msg": "hello!"})
def test_json_content_unicode(self):
"""
When Unicode JSON content is received, the JSON text should be
correctly decoded.
RFC7159 (8.1): "JSON text SHALL be encoded in UTF-8, UTF-16, or UTF-32.
The default encoding is UTF-8"
"""
self.response.headers = Headers()
d = json_content(self.response)
self.protocol.dataReceived(u'{"msg":"hëlló!"}'.encode('utf-8'))
self.protocol.connectionLost(Failure(ResponseDone()))
self.assertEqual(self.successResultOf(d), {u'msg': u'hëlló!'})
def test_json_content_utf16(self):
"""
JSON received is decoded according to the charset given in the
Content-Type header.
"""
self.response.headers = Headers({
b'Content-Type': [b"application/json; charset='UTF-16LE'"],
})
d = json_content(self.response)
self.protocol.dataReceived(u'{"msg":"hëlló!"}'.encode('UTF-16LE'))
self.protocol.connectionLost(Failure(ResponseDone()))
self.assertEqual(self.successResultOf(d), {u'msg': u'hëlló!'})
def test_text_content(self):
self.response.headers = Headers(
{b'Content-Type': [b'text/plain; charset=utf-8']})
d = text_content(self.response)
self.protocol.dataReceived(b'\xe2\x98\x83')
self.protocol.connectionLost(Failure(ResponseDone()))
self.assertEqual(self.successResultOf(d), u'\u2603')
def test_text_content_default_encoding_no_param(self):
self.response.headers = Headers(
{b'Content-Type': [b'text/plain']})
d = text_content(self.response)
self.protocol.dataReceived(b'\xa1')
self.protocol.connectionLost(Failure(ResponseDone()))
self.assertEqual(self.successResultOf(d), u'\xa1')
def test_text_content_default_encoding_no_header(self):
self.response.headers = Headers()
d = text_content(self.response)
self.protocol.dataReceived(b'\xa1')
self.protocol.connectionLost(Failure(ResponseDone()))
self.assertEqual(self.successResultOf(d), u'\xa1')
def test_content_application_json_default_encoding(self):
self.response.headers = Headers(
{b'Content-Type': [b'application/json']})
d = text_content(self.response)
self.protocol.dataReceived(b'gr\xc3\xbcn')
self.protocol.connectionLost(Failure(ResponseDone()))
self.assertEqual(self.successResultOf(d), u'grün')
def test_text_content_unicode_headers(self):
"""
Header parsing is robust against unicode header names and values.
"""
self.response.headers = Headers({
b'Content-Type': [
u'text/plain; charset="UTF-16BE"; u=ᛃ'.encode('utf-8')],
u'Coördination'.encode('iso-8859-1'): [
u'koʊˌɔrdɪˈneɪʃən'.encode('utf-8')],
})
d = text_content(self.response)
self.protocol.dataReceived(u'ᚠᚡ'.encode('UTF-16BE'))
self.protocol.connectionLost(Failure(ResponseDone()))
self.assertEqual(self.successResultOf(d), u'ᚠᚡ')