Integration tests for docker_node_facts (#52423)

test/integration/targets/docker_node_facts/aliases

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+shippable/posix/group2
+skip/osx
+skip/freebsd
+destructive
+skip/rhel8.0

test/integration/targets/docker_node_facts/meta/main.yml

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+---
+dependencies:
+  - setup_docker

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

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+- include_tasks: test_node_facts.yml
+  when: docker_py_version is version('1.10.0', '>=') and docker_api_version is version('1.24', '>=')
+
+- fail: msg="Too old docker / docker-py version to run docker_swarm_facts tests!"
+  when: not(docker_py_version is version('1.10.0', '>=') and docker_api_version is version('1.24', '>=')) and (ansible_distribution != 'CentOS' or ansible_distribution_major_version|int > 6)

test/integration/targets/docker_node_facts/tasks/test_node_facts.yml

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+---
+- block:
+  - name: Make sure we're not already using Docker swarm
+    docker_swarm:
+      state: absent
+      force: true
+
+  - name: Try to get docker_node_facts when docker is not running in swarm mode
+    docker_node_facts:
+    ignore_errors: yes
+    register: output
+
+  - name: assert failure when called when swarm is not in use or not run on manager node
+    assert:
+      that:
+         - 'output is failed'
+         - 'output.msg == "Error running docker swarm module: must run on swarm manager node"'
+
+  - name: Create a Swarm cluster
+    docker_swarm:
+      state: present
+    register: output
+
+  - name: assert changed when create a new swarm cluster
+    assert:
+      that:
+         - 'output is changed'
+         - 'output.actions[0] | regex_search("New Swarm cluster created: ")'
+         - 'output.swarm_facts.JoinTokens.Manager'
+         - 'output.swarm_facts.JoinTokens.Worker'
+
+  - name: Try to get docker_node_facts when docker is running in swarm mode and as manager
+    docker_node_facts:
+    register: output
+
+  - name: assert reading docker swarm node facts
+    assert:
+      that:
+         - 'output.nodes_facts | length > 0'
+         - 'output.nodes_facts[0].ID is string'
+
+  - name: Try to get docker_node_facts using the self parameter
+    docker_node_facts:
+      self: yes
+    register: output
+
+  - name: assert reading swarm facts with list of nodes option
+    assert:
+      that:
+         - 'output.nodes_facts | length == 1'
+         - 'output.nodes_facts[0].ID is string'
+
+  - name: Get local docker node name
+    set_fact:
+      localnodename:  "{{ output.nodes_facts[0].Description.Hostname }}"
+
+
+  - name: Try to get docker_node_facts using the local node name as parameter
+    docker_node_facts:
+      name: "{{ localnodename }}"
+    register: output
+
+  - name: assert reading reading swarm facts and using node filter (random node name)
+    assert:
+      that:
+         - 'output.nodes_facts | length == 1'
+         - 'output.nodes_facts[0].ID is string'
+
+  - name: Create random name
+    set_fact:
+      randomnodename: "{{ 'node-%0x' % ((2**32) | random) }}"
+
+  - name: Try to get docker_node_facts using random node name as parameter
+    docker_node_facts:
+      name: "{{ randomnodename }}"
+    register: output
+
+  - name: assert reading reading swarm facts and using node filter (random node name)
+    assert:
+      that:
+         - 'output.nodes_facts | length == 0'
+
+  always:
+  - name: Cleanup
+    docker_swarm:
+      state: absent
+      force: true