Skip 1.4 released with support for Xcode 16.3 and Swift 6.1

[marcprux]

We are pleased to announce the release of Skip 1.4. This version fixes an issue that was introduced with Xcode 16.3 where projects fail to launch on Android after updating Xcode.

To upgrade your projects, please do the following:

1. Update your local skip installation from the Terminal: skip upgrade
2. cd to your project folder and update your Android settings with: skip verify --fix
3. Open the Xcode project and update your dependencies: File/Packages/Update to Latest Package Versions

Once you have done this, your Skip apps should launch without errors. If you experience any problems, please join our Slack at https://skip.tools/slack and/or file an issue report either by appending to #381 or a new one at https://github.com/skiptools/skip/issues if you have an unrelated problem.

[marcprux]

Note that with the addition of support for Swift 6.1, we also support the Testing library on Android. If you install the Android 6.1 toolchain, you should be able to execute your Testing tests on a device or emulator (previously Skip had only supported legacy XCTest test cases).

A complete demonstration of the capabilities can be seen with the following commands:

zap ~ % cd /tmp
zap /tmp % skip android sdk install

[✓] Install Swift Android SDK (59.34s)

zap /tmp % skip android build --version

Swift Package Manager - Swift 6.1.0

zap /tmp % mkdir TestingDemo
zap /tmp % cd TestingDemo 
zap /tmp/TestingDemo % swift package init

Creating library package: TestingDemo
Creating Package.swift
Creating .gitignore
Creating Sources/
Creating Sources/TestingDemo/TestingDemo.swift
Creating Tests/
Creating Tests/TestingDemoTests/
Creating Tests/TestingDemoTests/TestingDemoTests.swift

zap /tmp/TestingDemo % cat Tests/TestingDemoTests/TestingDemoTests.swift

import Testing
@testable import TestingDemo

@Test func example() async throws {
    // Write your test here and use APIs like `#expect(...)` to check expected conditions.
}

zap /tmp/TestingDemo % skip android test

Building for debugging...
[0/13] Write sources
…
[25/26] Linking TestingDemoPackageTests.xctest
Build complete! (10.91s)
[✓] Check Swift Package (0.72s)
[✓] Connecting to Android (0.03s)
[✓] Copying test files (0.28s)
Test Suite 'All tests' started at 2025-04-04 09:14:08.762
Test Suite 'TestingDemo-5041DA98-FFC9-4C32-9398-BCCE66AAEF14.xctest' started at 2025-04-04 09:14:08.769
Test Suite 'TestingDemo-5041DA98-FFC9-4C32-9398-BCCE66AAEF14.xctest' passed at 2025-04-04 09:14:08.769
	 Executed 0 tests, with 0 failures (0 unexpected) in 0.0 (0.0) seconds
Test Suite 'All tests' passed at 2025-04-04 09:14:08.770
	 Executed 0 tests, with 0 failures (0 unexpected) in 0.0 (0.0) seconds
◇ Test run started.
↳ Testing Library Version: 6.1 (f4b4608275ef932 - modified)
↳ Target Platform: aarch64-unknown-linux-android
◇ Test example() started.
✔ Test example() passed after 0.001 seconds.
✔ Test run with 1 test passed after 0.001 seconds.

zap /tmp/TestingDemo % echo '@Test func failureDemo() async throws { #expect(1+2 == 4) }' >> Tests/TestingDemoTests/TestingDemoTests.swift

zap /tmp/TestingDemo % skip android test

Building for debugging...
[0/3] Write sources
…
[15/16] Linking TestingDemoPackageTests.xctest
Build complete! (1.44s)
[✓] Check Swift Package (0.24s)
[✓] Connecting to Android (0.02s)
[✓] Copying test files (0.27s)
Test Suite 'All tests' started at 2025-04-04 09:15:13.886
Test Suite 'TestingDemo-97FEAE21-8510-46F8-87DC-C18242C22360.xctest' started at 2025-04-04 09:15:13.890
Test Suite 'TestingDemo-97FEAE21-8510-46F8-87DC-C18242C22360.xctest' passed at 2025-04-04 09:15:13.890
	 Executed 0 tests, with 0 failures (0 unexpected) in 0.0 (0.0) seconds
Test Suite 'All tests' passed at 2025-04-04 09:15:13.890
	 Executed 0 tests, with 0 failures (0 unexpected) in 0.0 (0.0) seconds
◇ Test run started.
↳ Testing Library Version: 6.1 (f4b4608275ef932 - modified)
↳ Target Platform: aarch64-unknown-linux-android
◇ Test failureDemo() started.
◇ Test example() started.
✔ Test example() passed after 0.001 seconds.
✘ Test failureDemo() recorded an issue at TestingDemoTests.swift:7:41: Expectation failed: (1+2 → 3) == 4
✘ Test failureDemo() failed after 0.002 seconds with 1 issue.
✘ Test run with 2 tests failed after 0.002 seconds with 1 issue.

Viola! Enjoy your new testing capabilities!