Swift Fakes aims to improve the testability of Swift by providing standardized test doubles.
Test doubles are objects used to replace production objects for testing purposes.
To use the Fakes library in a SwiftPM project, add the following line to the
dependencies in your Package.swift file:
.package(url: "https://github.com/Quick/swift-fakes", from: "0.1.1"),Include "Fakes" as a dependency for your test target:
.testTarget(name: "<target>", dependencies: [
.product(name: "Fakes", package: "swift-fakes"),
]),When writing tests, we want to write one thing at a time. This is best done by providing fakes or non-production test-controllable objects to the thing being tested (the subject). This is typically done by writing fakes that implement the protocols that the subject depends on. Swift Fakes aims to make writing Fakes as easy as possible.
For the time being, Swift Fakes only offers the Spy object. Spys are a kind
of test double that record calls to the object, and return a preset response.
Spies are meant to be used in Fake objects to record arguments to a call, and return pre-stubbed responses.
See the documentation.
Swift Fakes is currently available as an Alpha. By 1.0, we aim to have it source stable and following Semantic Versioning.