[Console] Added dedicated testcase for HelperSet set class

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | no
| Fixed tickets | NA
| License       | MIT
| Doc PR        | NA

Previously the HelperSet class was only tested by way of the Application testcase. This patch adds a dedicated testcase and increases test coverage of the class to 100%.