Add a test for deduplicating dependencies with include_role (#75259)

test/integration/targets/roles/no_dupes.yml

@@ -17,3 +17,13 @@
   tasks:
     - name: execute role c which depends on a
       import_role: name=c
+
+- name: play should only show 1 invocation of a, as dependencies in this play are deduped by include_role
+  hosts: testhost
+  gather_facts: false
+  tags: [ 'intasks' ]
+  tasks:
+    - name: execute role b which depends on a
+      include_role: name=b
+    - name: execute role c which also depends on a
+      include_role: name=c

test/integration/targets/roles/runme.sh

@@ -5,9 +5,10 @@ set -eux
 # test no dupes when dependencies in b and c point to a in roles:
 [ "$(ansible-playbook no_dupes.yml -i ../../inventory --tags inroles "$@" | grep -c '"msg": "A"')" = "1" ]
 [ "$(ansible-playbook no_dupes.yml -i ../../inventory --tags acrossroles "$@" | grep -c '"msg": "A"')" = "1" ]
+[ "$(ansible-playbook no_dupes.yml -i ../../inventory --tags intasks "$@" | grep -c '"msg": "A"')" = "1" ]
 
 # but still dupe across plays
-[ "$(ansible-playbook no_dupes.yml -i ../../inventory "$@" | grep -c '"msg": "A"')" = "2" ]
+[ "$(ansible-playbook no_dupes.yml -i ../../inventory "$@" | grep -c '"msg": "A"')" = "3" ]
 
 # include/import can execute another instance of role
 [ "$(ansible-playbook allowed_dupes.yml -i ../../inventory --tags importrole "$@" | grep -c '"msg": "A"')" = "2" ]