eos_config: Fix test issues (#56180)

* Alter tests to pass

* Change diff_against to make changed work again

* Add another diff_against

* Expose supports_sessions across all EOS connection types

* Change session warning to failure

* supports_sessions needs to be a method to survive the rpc boundary

* Alter tests to match

test/integration/targets/eos_config/tests/cli/check_mode.yaml

@@ -1,5 +1,6 @@
 ---
-- debug: msg="START cli/check_mode.yaml on connection={{ ansible_connection }}"
+- debug:
+    msg: "START cli/check_mode.yaml on connection={{ ansible_connection }}"
 
 - name: invalid configuration in check mode
   eos_config:
@@ -39,11 +40,28 @@
    that:
      - "config.session not in result.stdout[0].sessions"
 
+- name: configuration in check mode + no config session
+  eos_config:
+     lines:
+         - ip address 119.31.1.1 255.255.255.254
+     parents: interface Loopback911
+  become: yes
+  check_mode: 1
+  vars:
+    ansible_eos_use_sessions: 0
+  register: result
+  ignore_errors: yes
+
+- assert:
+   that:
+   - "result.failed == true"
+
 - name: invalid configuration in check mode + no config session
   eos_config:
      lines:
          - ip address 119.31.1.1 255.255.255.256
      parents: interface Loopback911
+     diff_against: running
   become: yes
   check_mode: 1
   vars:
@@ -60,6 +78,7 @@
      lines:
          - ip address 119.31.1.1 255.255.255.255
      parents: interface Loopback911
+     diff_against: running
   become: yes
   check_mode: yes
   register: result

test/integration/targets/eos_config/tests/cli/sublevel_strict_mul_parents.yaml

@@ -1,5 +1,6 @@
 ---
-- debug: msg="START cli/sublevel_strict_mul_parents.yaml on connection={{ ansible_connection }}"
+- debug:
+    msg: "START cli/sublevel_strict_mul_parents.yaml on connection={{ ansible_connection }}"
 
 - name: setup
   eos_config:
@@ -12,60 +13,67 @@
     match: none
   become: yes
 
-- name: configure sub level command using strict match
-  eos_config:
-    lines:
-      - set cos 1
-      - set dscp 62
-    parents: ['policy-map type qos p1', 'class c1']
-    match: strict
-  register: result
-  become: yes
+- block:
+  - name: configure sub level command using strict match
+    eos_config:
+      lines:
+        - set cos 1
+        - set dscp 62
+      parents: ['policy-map type qos p1', 'class c1']
+      match: strict
+      # session-config diffs does not produce a diff here for some reason.
+      # check against running-config instead.
+      diff_against: running
+    register: result
+    become: yes
 
-- assert:
-    that:
-      - "result.changed == true"
-      - "'set cos 1' in result.updates"
-      - "'set dscp 62' in result.updates"
+  - assert:
+      that:
+        - "result.changed == true"
+        - "'set cos 1' in result.updates"
+        - "'set dscp 62' in result.updates"
 
-- name: change sub level command order and config with strict match
-  eos_config:
-    lines:
-      - set dscp 62
-      - set cos 1
-    parents: ['policy-map type qos p1', 'class c1']
-    match: strict
-  register: result
-  become: yes
+  - name: change sub level command order and config with strict match
+    eos_config:
+      lines:
+        - set dscp 62
+        - set cos 1
+      parents: ['policy-map type qos p1', 'class c1']
+      match: strict
+      diff_against: running
+    register: result
+    become: yes
 
-- assert:
-    that:
-      - "result.changed == true"
-      - "'set cos 1' in result.updates"
-      - "'set dscp 62' in result.updates"
+  - assert:
+      that:
+        - "result.changed == true"
+        - "'set cos 1' in result.updates"
+        - "'set dscp 62' in result.updates"
 
-- name: Config sub level command with strict match (Idempotency)
-  eos_config:
-    lines:
-#EOS does not change order of class action if reconfigured
-#so we have to use old order for Idempotency
-      - set cos 1
-      - set dscp 62
-    parents: ['policy-map type qos p1', 'class c1']
-    match: strict
-  register: result
-  become: yes
+  - name: Config sub level command with strict match (Idempotency)
+    eos_config:
+      lines:
+        #EOS does not change order of class action if reconfigured
+        #so we have to use old order for Idempotency
+        - set cos 1
+        - set dscp 62
+      parents: ['policy-map type qos p1', 'class c1']
+      match: strict
+      diff_against: running
+    register: result
+    become: yes
 
-- assert:
-    that:
-      - "result.changed == false"
+  - assert:
+      that:
+        - "result.changed == false"
 
-- name: teardown
-  eos_config:
-    lines:
-      - no policy-map type qos p1
-      - no class-map type qos match-any c1
-    match: none
-  become: yes
+  always:
+  - name: teardown
+    eos_config:
+      lines:
+        - no policy-map type qos p1
+        - no class-map type qos match-any c1
+      match: none
+    become: yes
 
 - debug: msg="END cli/sublevel_strict_mul_parents.yaml on connection={{ ansible_connection }}"