Increasing Unit Test Coverage and adding Firebase Analytics and Crashlytics

[buildwithmalik]

Overview

• Added Unit Test coverage for the API Network calls in the API service. For more info on stubbing network calls please refer this
• Added Firebase Analytics and crashlytics to the application. Some files have not been checked in version control for security reasons however, contributors can link their own firebase account for development and send PRs.
• If a release is being published either on GitHub or PlayStore please contact the admin of the project as you will be needing the confidential files to create a release that points to the original firebase project.