gem: Remove length chenck and adapt unit tests

Author: gdrosos

plugins/modules/gem.py

@@ -335,7 +335,7 @@ def main():
     elif module.params['state'] == 'absent':
         if exists(module):
             command_output = uninstall(module)
-            if command_output is not None and len(command_output) == 3 and exists(module):
+            if command_output is not None and exists(module):
                 rc, out, err = command_output
                 module.fail_json(
                     msg="Gem could not be removed",

tests/unit/plugins/modules/test_gem.py

@@ -52,6 +52,8 @@ def new(module):
 
     def patch_run_command(self):
         target = 'ansible.module_utils.basic.AnsibleModule.run_command'
+        mock = self.mocker.patch(target)
+        mock.return_value = (0, '', '')
         return self.mocker.patch(target)
 
     def test_fails_when_user_install_and_install_dir_are_combined(self):