Firebase Testing Support is a collection of libraries that provide type definitions and tools required for writing tests for code that uses Firebase, e.g.:

Instances of types like Query cannot be created with a simple constructor which makes unit testing of the code that depends on them difficult/impossible. Firestore Testing Support lib provides a type QueryFake that can be instantiated and used instead of actual Query instances in the tests.

Usage

Add dependency to your test target

Cocoapods

tests.dependency 'FirebaseFirestoreTestingSupport', '~> 1.0'

Swift Package Manager

dependencies: [
    ...
    "FirebaseFirestoreTestingSupport"
],

Use the fake types in the tests instead of real types

See test for example, e.g. QueryFakeTests.swift.

Development

Generate project

Cocoapods

E.g. for FirebaseFirestoreTestingSupport run the following command for the root repo directory:

pod gen --auto-open --local-sources=./ FirebaseFirestoreTestingSupport.podspec --platforms=ios

Swift Package Manager

Open the main package definition:

xed Package.swift

Select (or add if not exists yet) a scheme for the test target, e.g. FirestoreTestingSupportTests
make required modifications and run tests as needed.