issue #548: always treat transport=smart as 'ssh' for mitogen_via=.

The idea behind transport=smart is to select between paramiko and
OpenSSH given the availability of connection multiplexing and/or OSX
kernel bugs. We need to make no such choice.

ansible_mitogen/connection.py

@@ -356,6 +356,7 @@ CONNECTION_METHOD = {
     'machinectl': _connect_machinectl,
     'setns': _connect_setns,
     'ssh': _connect_ssh,
+    'smart': _connect_ssh,  # issue #548.
     'su': _connect_su,
     'sudo': _connect_sudo,
     'doas': _connect_doas,

tests/ansible/hosts/transport_config.hosts

@@ -5,6 +5,7 @@
 # tansport()
 tc-transport-unset
 tc-transport-local ansible_connection=local
+tc-transport-smart ansible_connection=smart
 
 # python_path()
 tc-python-path-unset

tests/ansible/integration/transport_config/all.yml

@@ -8,3 +8,4 @@
 - include: remote_addr.yml
 - include: remote_user.yml
 - include: transport.yml
+- include: transport__smart.yml

tests/ansible/integration/transport_config/transport__smart.yml

@@ -0,0 +1,49 @@
+# issue #548
+# Each case is followed by mitogen_via= case to test hostvars method.
+
+
+# When no ansible_connection= is set, transport comes via ansible.cfg ("smart"
+# is parsed away to either paramiko or ssh).
+- name: integration/transport_config/transport.yml
+  hosts: tc-transport-smart
+  tasks:
+  - include: ../_mitogen_only.yml
+  - {mitogen_get_stack: {}, register: out}
+  - assert_equal:
+      left: out.result[0].method
+      right: "ssh"
+
+- hosts: tc-transport-local
+  vars: {mitogen_via: tc-transport-smart}
+  tasks:
+  - include: ../_mitogen_only.yml
+  - {mitogen_get_stack: {}, register: out}
+  - assert_equal:
+      left: out.result[0].method
+      right: "ssh"
+  - assert_equal:
+      left: out.result[1].method
+      right: "local"
+
+
+# ansible_connection=local
+
+- hosts: tc-transport-local
+  tasks:
+  - include: ../_mitogen_only.yml
+  - {mitogen_get_stack: {}, register: out}
+  - assert_equal:
+      left: out.result[0].method
+      right: "local"
+
+- hosts: tc-transport-smart
+  vars: {mitogen_via: tc-transport-local}
+  tasks:
+  - include: ../_mitogen_only.yml
+  - {mitogen_get_stack: {}, register: out}
+  - assert_equal:
+      left: out.result[0].method
+      right: "local"
+  - assert_equal:
+      left: out.result[1].method
+      right: "ssh"