issue #294: stronger integration test

Run the tests in a brand new ansible-playbook invocation, and try both
linear->mitogen->linear and mitogen->linear->mitogen.

tests/ansible/integration/strategy/_mixed_mitogen_vanilla.yml

@@ -0,0 +1,45 @@
+
+# issue #294: ensure running mixed vanilla/Mitogen succeeds.
+
+- name: integration/strategy/_mixed_mitogen_vanilla.yml (mitogen_linear)
+  hosts: test-targets
+  any_errors_fatal: true
+  strategy: mitogen_linear
+  tasks:
+    - custom_python_detect_environment:
+      register: out
+    - assert:
+        that: out.mitogen_loaded
+
+    - determine_strategy:
+    - assert:
+        that: strategy == 'ansible.plugins.strategy.mitogen_linear.StrategyModule'
+
+- name: integration/strategy/_mixed_mitogen_vanilla.yml (linear)
+  hosts: test-targets
+  any_errors_fatal: true
+  strategy: linear
+  tasks:
+    - custom_python_detect_environment:
+      register: out
+    - assert:
+        that: not out.mitogen_loaded
+
+    - determine_strategy:
+    - assert:
+        that: strategy == 'ansible.plugins.strategy.linear.StrategyModule'
+
+
+- name: integration/strategy/_mixed_mitogen_vanilla.yml (mitogen_linear)
+  hosts: test-targets
+  any_errors_fatal: true
+  strategy: mitogen_linear
+  tasks:
+    - custom_python_detect_environment:
+      register: out
+    - assert:
+        that: out.mitogen_loaded
+
+    - determine_strategy:
+    - assert:
+        that: strategy == 'ansible.plugins.strategy.mitogen_linear.StrategyModule'

tests/ansible/integration/strategy/_mixed_vanilla_mitogen.yml

@@ -1,7 +1,7 @@
 
 # issue #294: ensure running mixed vanilla/Mitogen succeeds.
 
-- name: integration/strategy/mixed_vanilla_ansible.yml (linear)
+- name: integration/strategy/_mixed_vanilla_mitogen.yml (linear)
   hosts: test-targets
   any_errors_fatal: true
   strategy: linear
@@ -15,7 +15,7 @@
     - assert:
         that: strategy == 'ansible.plugins.strategy.linear.StrategyModule'
 
-- name: integration/strategy/mixed_vanilla_ansible.yml (mitogen_linear)
+- name: integration/strategy/_mixed_vanilla_mitogen.yml (mitogen_linear)
   hosts: test-targets
   any_errors_fatal: true
   strategy: mitogen_linear
@@ -30,7 +30,7 @@
         that: strategy == 'ansible.plugins.strategy.mitogen_linear.StrategyModule'
 
 
-- name: integration/strategy/mixed_vanilla_ansible.yml (linear)
+- name: integration/strategy/_mixed_vanilla_mitogen.yml (linear)
   hosts: test-targets
   any_errors_fatal: true
   strategy: linear

tests/ansible/integration/strategy/all.yml

@@ -1 +1 @@
-- import_playbook: mixed_vanilla_ansible.yml
+- import_playbook: mixed_vanilla_mitogen.yml

tests/ansible/integration/strategy/mixed_vanilla_mitogen.yml

@@ -0,0 +1,22 @@
+
+- name: integration/strategy/mixed_vanilla_mitogen.yml (linear->mitogen->linear)
+  hosts: test-targets
+  any_errors_fatal: true
+  tasks:
+    - connection: local
+      command: |
+        ansible-playbook
+        -i "{{inventory_file}}"
+        integration/strategy/_mixed_mitogen_vanilla.yml
+      args:
+        chdir: ../..
+      register: out
+
+    - connection: local
+      command: |
+        ansible-playbook
+        -i "{{inventory_file}}"
+        integration/strategy/_mixed_vanilla_mitogen.yml
+      args:
+        chdir: ../..
+      register: out