Add tests to the rest controller

[Agaba-derrick]

Pull Requests Requirements

• The PR title includes a brief description of the work done, including the
  Issue number if applicable.
• The PR includes a video showing the changes for the work done.
• The PR title follows conventional commit label standards.
• The changes confirm to the OpenElis Global x3
  Styleguide and Design
  documentation.
• The changes include tests or are validated by existing tests.
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  project.

Summary

Screenshots

Related Issue

Closes #2159

Other

[Add any additional information or notes here]

[github-actions]

👋 Hi, @Agaba-derrick,
Conflicts have been detected against the base branch. Please rebase your branch against the base branch.

---

This message is automatically generated by prince-chrismc/label-merge-conflicts-action so don't hesitate to report issues/improvements there.

[github-actions]

👋 Hi, @Agaba-derrick,
Conflicts have been detected against the base branch. Please rebase your branch against the base branch.

---

This message is automatically generated by prince-chrismc/label-merge-conflicts-action so don't hesitate to report issues/improvements there.

[github-actions]

👋 Hi, @Agaba-derrick,
Conflicts have been detected against the base branch. Please rebase your branch against the base branch.

---

This message is automatically generated by prince-chrismc/label-merge-conflicts-action so don't hesitate to report issues/improvements there.