A modern Swift testing library
Catch changes your assertions cannot see.
SnapshotTesting compares a value with a stored reference. Test UIKit and SwiftUI screens, JSON, requests, dumps, and the formats that matter to your project.
Latest stable release
2.2.0
Published August 16, 2026
Swift Package Manager: .upToNextMajor(from: "2.2.0")
One assertion, a useful result
Start with the test you already wanted to write.
The first run records a missing reference and tells you where it went. Later runs compare against that file and point to the difference when the value changes.
ProfileTests.swift
import SnapshotTesting
import Testing
@MainActor
struct ProfileTests {
@Test func profileCard() {
assertSnapshot(of: ProfileCard(), as: .image)
}
}Reference = Current: a reference snapshot matching the current rendering.
References that stay readable
See the change. Keep the proof.
Snapshot files live beside tests by default. They are ordinary files, easy to review in a pull request and simple to update when a visual change is intentional.
What it tests
Images — Render UIKit and SwiftUI views at the devices and traits you choose.
Text formats — Compare JSON, property lists, raw requests, and recursive descriptions.
SwiftUI previews — Reuse preview definitions in tests with SnapshotPreviews.
Your own values — Write a snapshot strategy for data that has a stable representation.
Built for current Swift
Swift 6.3, Apple platforms, Linux, and Android.
Image rendering uses native platform frameworks. Text and data snapshots work wherever Swift does.
A maintained fork
Built on Point-Free’s original SnapshotTesting.
This project continues the library created by Point-Free, with Swift 6 support and active maintenance by Modern Swift Development.
Snapshot testing for Swift projects. Maintained by Modern Swift Development.