Improve test coverage for Runner

[ryanbodrug-microsoft]

Summary of the new feature/enhancement

There is currently no test coverage for the runner project.

Proposed technical implementation details (optional)

1. Identify business logic and test cases that should be applied for the runner.
2. Provide unit tests that can be applied without a redesign of the runner code.
3. Propose refactoring/redesign of the runner code that may improve the testability of the codebase.

[Jay-o-Way]

Old issue. Any progress?