### Motivation and Context

We've been working on increasing the test coverage. These tests aren't
specific to the CQ spike, but I noticed that there was covering lacking
for them, and they were "low hanging fruit."

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### Description

Increasing the test coverage for some classes that have current test
coverage but were missing some line coverage here and there. At this
point in time, the test coverage report is showing 95% covered now.

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### Contribution Checklist

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- [X] The code builds clean without any errors or warnings
- [X] The PR follows the [SK Contribution
Guidelines](https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md)
and the [pre-submission formatting
script](https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md#development-scripts)
raises no violations
- [X] All unit tests pass, and I have added new tests where possible
- [X] I didn't break anyone 😄

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Co-authored-by: Gil LaHaye <gillahaye@microsoft.com>