Create FileReaderTests.java

[sjdefran1]

Description

Added unit test for FileReader.java from utils

Fixes #(issue)

#829

Type of change

Just put an x in the [] which are valid.

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes.

• [ ] ./gradlew assembleDebug assembleRelease
• [ ] ./gradlew checkstyle

Checklist:

• [ ] My code follows the style guidelines of this project
• [ ] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [ ] My changes generate no new warnings

[codeclimate[bot]]

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