Add test for checking pip package in check mode (#17360)

test/integration/roles/test_pip/tasks/main.yml

@@ -116,3 +116,19 @@
   assert:
     that:
       - "not url_installed.changed"
+
+
+# Test pip package in check mode doesn't always report changed.
+
+- name: check for pip package
+  pip: name=pip virtualenv={{ output_dir }}/pipenv state=present
+
+- name: check for pip package in check_mode
+  pip: name=pip virtualenv={{ output_dir }}/pipenv state=present
+  check_mode: True
+  register: pip_check_mode
+
+- name: make sure pip in check_mode doesn't report changed
+  assert:
+    that:
+      - "not pip_check_mode.changed"