issue #536: add tests for each ansible_python_interpreter case.

tests/ansible/hosts/transport_config.hosts

@@ -0,0 +1,10 @@
+# integration/transport_config
+# Hosts with twiddled configs that need to be checked somehow.
+
+tc-python-path-unset
+tc-python-path-hostvar  ansible_python_interpreter=/hostvar/path/to/python
+
+# local connections get virtualenv python path
+tc-python-path-local-unset ansible_connection=local
+tc-python-path-local-explicit ansible_connection=local ansible_python_interpreter=/a/b/c
+

tests/ansible/integration/all.yml

@@ -19,3 +19,4 @@
 - include: ssh/all.yml
 - include: strategy/all.yml
 - include: stub_connections/all.yml
+- include: transport_config/all.yml

tests/ansible/integration/transport_config/README.md

@@ -0,0 +1,7 @@
+
+# Tests for correct selection of connection variables.
+
+This directory is a placeholder for a work-in-progress test set that tries
+every combination of the variables extracted via `transport_config.py`.
+
+In the meantime, it has ad-hoc scripts for bugs already encountered.

tests/ansible/integration/transport_config/all.yml

@@ -0,0 +1,2 @@
+
+- include: python_path.yml

tests/ansible/integration/transport_config/python_path.yml

@@ -0,0 +1,51 @@
+# related: issue #511, #536
+
+- name: integration/transport_config/python_path.yml
+  hosts: tc-python-path-unset
+
+  # When no ansible_python_interpreter is set, executor/module_common.py
+  # chooses "/usr/bin/python".
+  tasks:
+  - mitogen_get_stack:
+    register: out
+  - assert_equal:
+      left: out.result[0].kwargs.python_path
+      right: ["/usr/bin/python"]
+
+
+- hosts: tc-python-path-hostvar
+  tasks:
+  - mitogen_get_stack:
+    register: out
+  - assert_equal:
+      left: out.result[0].kwargs.python_path
+      right: [/hostvar/path/to/python]
+
+
+# Implicit localhost gets ansible_python_interpreter=virtualenv interpreter
+- hosts: localhost
+  tasks:
+  - mitogen_get_stack:
+    register: out
+  - assert_equal:
+      left: out.result[0].kwargs.python_path
+      right: ["{{ansible_playbook_python}}"]
+
+
+# explicit local connections get the same treatment as everything else.
+- hosts: tc-python-path-local-unset
+  tasks:
+  - mitogen_get_stack:
+    register: out
+  - assert_equal:
+      left: out.result[0].kwargs.python_path
+      right: ["/usr/bin/python"]
+
+
+- hosts: tc-python-path-local-explicit
+  tasks:
+  - mitogen_get_stack:
+    register: out
+  - assert_equal:
+      left: out.result[0].kwargs.python_path
+      right: ["/a/b/c"]