Firebase Mock for Swift

This is an ad-hoc mock class for UI testing with Firebase and Swift for a small project I am working on..

How to use

1. You need to add the Firebase framework to your project.
2. Add the file firebase.swift to your project. Conveniently rename it to MockFirebase.swift or something.
3. Substitute Firebase for MockFirebase in your tests.

How to contribute

1. Fork the repo
2. Add the Firebase framework to the project
3. Run carthage bootstrap to add testing frameworks Quick/Nimble
4. Add more mock firebase functions and write appropriate tests
5. Create a pull request