VMware: Add check mode support to module vmware_host_dns_facts (#46530)

test/integration/targets/vmware_host_dns_facts/tasks/main.yml

@@ -83,3 +83,35 @@
     that:
         - all_hosts_dns_result.hosts_dns_facts
         - not all_hosts_dns_result.changed
+
+- name: gather DNS facts about all hosts in given cluster in check mode
+  vmware_host_dns_facts:
+    hostname: "{{ vcsim }}"
+    username: "{{ vcsim_instance.json.username }}"
+    password: "{{ vcsim_instance.json.password }}"
+    cluster_name: "{{ ccr1 }}"
+    validate_certs: no
+  register: all_hosts_dns_result_check_mode
+  check_mode: yes
+
+- name: ensure DNS facts are gathered for all hosts in given cluster
+  assert:
+    that:
+        - all_hosts_dns_result_check_mode.hosts_dns_facts
+        - not all_hosts_dns_result_check_mode.changed
+
+- name: gather DNS facts about host system in check mode
+  vmware_host_dns_facts:
+    hostname: "{{ vcsim }}"
+    username: "{{ vcsim_instance.json.username }}"
+    password: "{{ vcsim_instance.json.password }}"
+    esxi_hostname: "{{ host1 }}"
+    validate_certs: no
+  register: all_hosts_dns_result_check_mode
+  check_mode: yes
+
+- name: ensure DNS facts are gathered about host system
+  assert:
+    that:
+        - all_hosts_dns_result_check_mode.hosts_dns_facts
+        - not all_hosts_dns_result_check_mode.changed