Switch from nose to pytest (#5282)

* Use pipstrap to install a good version of pip

* Use pytest in cb-auto tests

* Remove nose usage in auto_test.py

* remove nose dev dep

* use pytest in test_tests

* Use pytest in tox

* Update dev dependency pinnings

* remove nose multiprocess lines

* Use pytest for coverage

* Use older py and pytest for old python versions

* Add test for Error.__str__

* pin pytest in oldest test

* Fix tests for DNS-DO plugin on py26

* Work around bug for Python 3.3

* Clarify dockerfile comments

acme/acme/crypto_util_test.py

@@ -18,7 +18,6 @@ from acme import test_util
 class SSLSocketAndProbeSNITest(unittest.TestCase):
     """Tests for acme.crypto_util.SSLSocket/probe_sni."""
 
-    _multiprocess_can_split_ = True
 
     def setUp(self):
         self.cert = test_util.load_comparable_cert('rsa2048_cert.pem')
@@ -69,7 +68,6 @@ class SSLSocketAndProbeSNITest(unittest.TestCase):
 class PyOpenSSLCertOrReqSANTest(unittest.TestCase):
     """Test for acme.crypto_util._pyopenssl_cert_or_req_san."""
 
-    _multiprocess_can_split_ = True
 
     @classmethod
     def _call(cls, loader, name):
@@ -140,7 +138,6 @@ class PyOpenSSLCertOrReqSANTest(unittest.TestCase):
 class RandomSnTest(unittest.TestCase):
     """Test for random certificate serial numbers."""
 
-    _multiprocess_can_split_ = True
 
     def setUp(self):
         self.cert_count = 5

acme/acme/messages_test.py

@@ -71,6 +71,12 @@ class ErrorTest(unittest.TestCase):
         self.assertTrue(is_acme_error(Error.with_code('badCSR')))
         self.assertRaises(ValueError, Error.with_code, 'not an ACME error code')
 
+    def test_str(self):
+        self.assertEqual(
+            str(self.error),
+            u"{0.typ} :: {0.description} :: {0.detail} :: {0.title}"
+            .format(self.error))
+
 
 class ConstantTest(unittest.TestCase):
     """Tests for acme.messages._Constant."""

acme/acme/standalone_test.py

@@ -23,7 +23,6 @@ from acme import test_util
 class TLSServerTest(unittest.TestCase):
     """Tests for acme.standalone.TLSServer."""
 
-    _multiprocess_can_split_ = True
 
     def test_bind(self):  # pylint: disable=no-self-use
         from acme.standalone import TLSServer
@@ -42,7 +41,6 @@ class TLSServerTest(unittest.TestCase):
 class TLSSNI01ServerTest(unittest.TestCase):
     """Test for acme.standalone.TLSSNI01Server."""
 
-    _multiprocess_can_split_ = True
 
     def setUp(self):
         self.certs = {b'localhost': (
@@ -70,7 +68,6 @@ class TLSSNI01ServerTest(unittest.TestCase):
 class HTTP01ServerTest(unittest.TestCase):
     """Tests for acme.standalone.HTTP01Server."""
 
-    _multiprocess_can_split_ = True
 
     def setUp(self):
         self.account_key = jose.JWK.load(
@@ -124,7 +121,6 @@ class HTTP01ServerTest(unittest.TestCase):
 class BaseDualNetworkedServersTest(unittest.TestCase):
     """Test for acme.standalone.BaseDualNetworkedServers."""
 
-    _multiprocess_can_split_ = True
 
     class SingleProtocolServer(socketserver.TCPServer):
         """Server that only serves on a single protocol. FreeBSD has this behavior for AF_INET6."""
@@ -174,7 +170,6 @@ class BaseDualNetworkedServersTest(unittest.TestCase):
 class TLSSNI01DualNetworkedServersTest(unittest.TestCase):
     """Test for acme.standalone.TLSSNI01DualNetworkedServers."""
 
-    _multiprocess_can_split_ = True
 
     def setUp(self):
         self.certs = {b'localhost': (
@@ -202,7 +197,6 @@ class TLSSNI01DualNetworkedServersTest(unittest.TestCase):
 class HTTP01DualNetworkedServersTest(unittest.TestCase):
     """Tests for acme.standalone.HTTP01DualNetworkedServers."""
 
-    _multiprocess_can_split_ = True
 
     def setUp(self):
         self.account_key = jose.JWK.load(
@@ -254,7 +248,6 @@ class HTTP01DualNetworkedServersTest(unittest.TestCase):
 class TestSimpleTLSSNI01Server(unittest.TestCase):
     """Tests for acme.standalone.simple_tls_sni_01_server."""
 
-    _multiprocess_can_split_ = True
 
     def setUp(self):
         # mirror ../examples/standalone

acme/setup.py

@@ -31,7 +31,8 @@ if sys.version_info < (2, 7):
     ])
 
 dev_extras = [
-    'nose',
+    'pytest',
+    'pytest-xdist',
     'tox',
 ]