Fix SSH port parsing and add regression tests

docker/transport/sshconn.py

@@ -30,10 +30,10 @@ def __init__(self, host):
         self.host = host
         self.port = None
         self.user = None
-        if ':' in host:
-            self.host, self.port = host.split(':')
+        if ':' in self.host:
+            self.host, self.port = self.host.split(':')
         if '@' in self.host:
-            self.user, self.host = host.split('@')
+            self.user, self.host = self.host.split('@')
 
         self.proc = None
 
@@ -167,7 +167,7 @@ class SSHHTTPAdapter(BaseHTTPAdapter):
     def __init__(self, base_url, timeout=60,
                  pool_connections=constants.DEFAULT_NUM_POOLS,
                  max_pool_size=constants.DEFAULT_MAX_POOL_SIZE,
-                 shell_out=True):
+                 shell_out=False):
         self.ssh_client = None
         if not shell_out:
             self._create_paramiko_client(base_url)

tests/unit/sshadapter_test.py

@@ -0,0 +1,32 @@
+import unittest
+import docker
+from docker.transport.sshconn import SSHSocket
+
+class SSHAdapterTest(unittest.TestCase):
+    def test_ssh_hostname_prefix_trim(self):
+        conn = docker.transport.SSHHTTPAdapter(base_url="ssh://user@hostname:1234", shell_out=True)
+        assert conn.ssh_host == "user@hostname:1234"
+
+    def test_ssh_parse_url(self):
+        c = SSHSocket(host="user@hostname:1234")
+        assert c.host == "hostname"
+        assert c.port == "1234"
+        assert c.user == "user"
+
+    def test_ssh_parse_hostname_only(self):
+        c = SSHSocket(host="hostname")
+        assert c.host == "hostname"
+        assert c.port == None
+        assert c.user == None
+
+    def test_ssh_parse_user_and_hostname(self):
+        c = SSHSocket(host="user@hostname")
+        assert c.host == "hostname"
+        assert c.port == None
+        assert c.user == "user"
+
+    def test_ssh_parse_hostname_and_port(self):
+        c = SSHSocket(host="hostname:22")
+        assert c.host == "hostname"
+        assert c.port == "22"
+        assert c.user == None