user: fix default non-system user's shell on macOS

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

@@ -108,3 +108,53 @@
   assert:
       that:
           - '"ansibulluser" not in user_names2.stdout_lines'
+
+
+- block:
+    - name: create non-system user on OSX to test the shell is set to /bin/bash
+      user:
+        name: osxuser
+      register: osxuser_output
+
+    - name: validate the shell is set to /bin/bash
+      assert:
+        that:
+          - 'osxuser_output.shell == "/bin/bash"'
+
+    - name: cleanup
+      user:
+        name: osxuser
+        state: absent
+
+    - name: create system user on OSX to test the shell is set to /usr/bin/false
+      user:
+        name: osxuser
+        system: yes
+      register: osxuser_output
+
+    - name: validate the shell is set to /usr/bin/false
+      assert:
+        that:
+          - 'osxuser_output.shell == "/usr/bin/false"'
+
+    - name: cleanup
+      user:
+        name: osxuser
+        state: absent
+
+    - name: create non-system user on OSX and set the shell to /bin/sh
+      user:
+        name: osxuser
+        shell: /bin/sh
+      register: osxuser_output
+
+    - name: validate the shell is set to /bin/sh
+      assert:
+        that:
+          - 'osxuser_output.shell == "/bin/sh"'
+
+    - name: cleanup
+      user:
+        name: osxuser
+        state: absent
+  when: ansible_distribution == "MacOSX"