Use 127.0.0.1 instead of '' to bind on Travis because of errno 99.

src/greentest/greentest.py

@@ -371,6 +371,7 @@ LOCAL_TIMEOUT = 1
 
 DEFAULT_LOCAL_HOST_ADDR = 'localhost'
 DEFAULT_LOCAL_HOST_ADDR6 = DEFAULT_LOCAL_HOST_ADDR
+DEFAULT_BIND_ADDR = ''
 
 if RUNNING_ON_TRAVIS:
     # As of November 2017 (probably Sept or Oct), after a
@@ -380,6 +381,9 @@ if RUNNING_ON_TRAVIS:
     # docker containers. Sigh.
     DEFAULT_LOCAL_HOST_ADDR = '127.0.0.1'
     DEFAULT_LOCAL_HOST_ADDR6 = '::1'
+    # Likewise, binding to '' appears to work, but it cannot be
+    # connected to with the same error.
+    DEFAULT_BIND_ADDR = '127.0.0.1'
 
 class TestCase(TestCaseMetaClass("NewBase", (BaseTestCase,), {})):
     __timeout__ = LOCAL_TIMEOUT if not RUNNING_ON_CI else CI_TIMEOUT

src/greentest/test__server.py

@@ -107,7 +107,6 @@ class TestCase(greentest.TestCase):
             sock.connect((server_host, server_port))
         except Exception:
             # avoid ResourceWarning under Py3
-            print("Failed to connect to", server_host, server_port, self.server.server_host)
             sock.close()
             raise
 
@@ -188,13 +187,13 @@ class TestCase(greentest.TestCase):
         self.assertConnectionRefused()
 
     def report_netstat(self, msg):
-        return
+        if 0:
             print(msg)
             os.system('sudo netstat -anp | grep %s' % os.getpid())
             print('^^^^^')
 
     def _create_server(self):
-        return self.ServerSubClass(('', 0))
+        return self.ServerSubClass((greentest.DEFAULT_BIND_ADDR, 0))
 
     def init_server(self):
         self.server = self._create_server()
@@ -207,7 +206,7 @@ class TestCase(greentest.TestCase):
 
     def _test_invalid_callback(self):
         try:
-            self.server = self.ServerClass(('', 0), lambda: None)
+            self.server = self.ServerClass((greentest.DEFAULT_BIND_ADDR, 0), lambda: None)
             self.server.start()
 
             self.expect_one_error()
@@ -254,7 +253,7 @@ class TestDefaultSpawn(TestCase):
         self.assertRaises(TypeError, self.ServerClass, self.get_listener(), backlog=25, handle=False)
 
     def test_backlog_is_accepted_for_address(self):
-        self.server = self.ServerSubClass(('', 0), backlog=25)
+        self.server = self.ServerSubClass((greentest.DEFAULT_BIND_ADDR, 0), backlog=25)
         self.assertConnectionRefused()
         self._test_server_start_stop(restartable=False)
 
@@ -264,12 +263,13 @@ class TestDefaultSpawn(TestCase):
 
     def test_subclass_with_socket(self):
         self.server = self.ServerSubClass(self.get_listener())
-        # the connection won't be refused, because there exists a listening socket, but it won't be handled also
+        # the connection won't be refused, because there exists a
+        # listening socket, but it won't be handled also
         self.assertNotAccepted()
         self._test_server_start_stop(restartable=True)
 
     def test_subclass_with_address(self):
-        self.server = self.ServerSubClass(('', 0))
+        self.server = self.ServerSubClass((greentest.DEFAULT_BIND_ADDR, 0))
         self.assertConnectionRefused()
         self._test_server_start_stop(restartable=True)
 
@@ -295,7 +295,7 @@ class TestDefaultSpawn(TestCase):
         self._test_serve_forever()
 
     def test_serve_forever_after_start(self):
-        self.server = self.ServerSubClass(('', 0))
+        self.server = self.ServerSubClass((greentest.DEFAULT_BIND_ADDR, 0))
         self.assertConnectionRefused()
         assert not self.server.started
         self.server.start()
@@ -303,7 +303,7 @@ class TestDefaultSpawn(TestCase):
         self._test_serve_forever()
 
     def test_server_closes_client_sockets(self):
-        self.server = self.ServerClass(('', 0), lambda *args: [])
+        self.server = self.ServerClass((greentest.DEFAULT_BIND_ADDR, 0), lambda *args: [])
         self.server.start()
         conn = self.send_request()
         timeout = gevent.Timeout.start_new(1)
@@ -422,7 +422,7 @@ class TestNoneSpawn(TestCase):
     def test_assertion_in_blocking_func(self):
         def sleep(*args):
             gevent.sleep(0)
-        self.server = Settings.ServerClass(('', 0), sleep, spawn=None)
+        self.server = Settings.ServerClass((greentest.DEFAULT_BIND_ADDR, 0), sleep, spawn=None)
         self.server.start()
         self.expect_one_error()
         self.assert500()
@@ -461,7 +461,7 @@ else:
     class TestSSLGetCertificate(TestCase):
 
         def _create_server(self):
-            return self.ServerSubClass(('', 0),
+            return self.ServerSubClass((greentest.DEFAULT_BIND_ADDR, 0),
                                        keyfile=_file('server.key'),
                                        certfile=_file('server.crt'))
 

src/greentest/test__socket.py

@@ -326,7 +326,9 @@ class TestCreateConnection(greentest.TestCase):
 
     def test(self):
         try:
-            socket.create_connection(('localhost', get_port()), timeout=30, source_address=('', get_port()))
+            socket.create_connection((greentest.DEFAULT_BIND_ADDR, get_port()),
+                                     timeout=30,
+                                     source_address=('', get_port()))
         except socket.error as ex:
             if 'refused' not in str(ex).lower():
                 raise