Allow {web_,task_,}replicas to be 0 and split out molecule tests (#1468)

Signed-off-by: Rick Elrod <rick@elrod.me>

molecule/default/tasks/_test_case_replicas.yml

@@ -0,0 +1,35 @@
+---
+- name: Get web pod details
+  k8s_info:
+    namespace: '{{ namespace }}'
+    kind: Pod
+    label_selectors:
+      - app.kubernetes.io/name = example-awx-web
+  register: awx_web_pod
+  # This can take a while to actually make it to the cluster
+  retries: 30
+  delay: 5
+  until: awx_web_pod.resources | length == expected_web_replicas
+  ignore_errors: true
+
+- name: Get task pod details
+  k8s_info:
+    namespace: '{{ namespace }}'
+    kind: Pod
+    label_selectors:
+      - app.kubernetes.io/name = example-awx-task
+  register: awx_task_pod
+  # This can take a while to actually make it to the cluster
+  retries: 30
+  delay: 5
+  until: awx_task_pod.resources | length == expected_task_replicas
+  ignore_errors: true
+
+- name: Ensure that the correct number of web and task pods exist
+  assert:
+    that:
+      - awx_web_pod.resources | length == expected_web_replicas
+      - awx_task_pod.resources | length == expected_task_replicas
+    fail_msg: >-
+      Web pods: Expected {{ expected_web_replicas }}, got {{ awx_web_pod.resources | length }}.
+      Task pods: Expected {{ expected_task_replicas }}, got {{ awx_task_pod.resources | length }}.

molecule/default/tasks/apply_awx_spec.yml

@@ -0,0 +1,13 @@
+---
+- name: Create or update the awx.ansible.com/v1alpha1.AWX
+  k8s:
+    state: present
+    namespace: '{{ namespace }}'
+    definition: "{{ lookup('template', 'awx_cr_molecule.yml.j2') | from_yaml }}"
+    apply: true
+    wait: yes
+    wait_timeout: 900
+    wait_condition:
+      type: Running
+      reason: Successful
+      status: "True"

molecule/default/tasks/awx_replicas_test.yml

@@ -0,0 +1,64 @@
+---
+- block:
+  - debug:
+      msg: test - web_replicas and task_replicas should override replicas
+
+  - include_tasks: apply_awx_spec.yml
+    vars:
+      additional_fields:
+        replicas: 2
+        web_replicas: 0
+        task_replicas: 0
+
+  - include_tasks: _test_case_replicas.yml
+    vars:
+      expected_web_replicas: 0
+      expected_task_replicas: 0
+
+####
+
+  - debug:
+      msg: test - replicas should act as a default
+
+  - include_tasks: apply_awx_spec.yml
+    vars:
+      additional_fields:
+        replicas: 2
+        web_replicas: 1
+
+  - include_tasks: _test_case_replicas.yml
+    vars:
+      expected_web_replicas: 1
+      expected_task_replicas: 2
+
+####
+
+  - debug:
+      msg: test - replicas=0 should kill all pods
+
+  - include_tasks: apply_awx_spec.yml
+    vars:
+      additional_fields:
+        replicas: 0
+
+  - include_tasks: _test_case_replicas.yml
+    vars:
+      expected_web_replicas: 0
+      expected_task_replicas: 0
+
+####
+
+  - debug:
+      msg: test - replicas=3 should give 3 of each
+
+  - include_tasks: apply_awx_spec.yml
+    vars:
+      additional_fields:
+        replicas: 3
+
+  - include_tasks: _test_case_replicas.yml
+    vars:
+      expected_web_replicas: 3
+      expected_task_replicas: 3
+  tags:
+    - replicas

molecule/default/tasks/awx_test.yml

@@ -1,15 +1,5 @@
 ---
-- name: Create the awx.ansible.com/v1alpha1.AWX
-  k8s:
-    state: present
-    namespace: '{{ namespace }}'
-    definition: "{{ lookup('template', 'awx_cr_molecule.yml.j2') | from_yaml }}"
-    wait: yes
-    wait_timeout: 900
-    wait_condition:
-      type: Running
-      reason: Successful
-      status: "True"
+- include_tasks: apply_awx_spec.yml
 
 - name: Obtain generated admin password
   k8s_info: