ci: Remove macos-10.15 usage (#2312)

GH actions will remove the macOS-10.15 image, which contains an iOS 12 simulator on 12/1/22; see actions/runner-images#5583. Neither the[ macOS-11](https://github.com/actions/runner-images/blob/main/images/macos/macos-11-Readme.md#installed-sdks) nor the [macOS-12](https://github.com/actions/runner-images/blob/main/images/macos/macos-12-Readme.md#installed-sdks) image contains an iOS 12 simulator. GH [concluded](actions/runner-images#551 (comment)) to not add more pre-installed simulators. SauceLabs doesn't support running unit tests and adding another cloud solution as Firebase TestLab would increase the complexity of CI. Not running the unit tests on iOS 12 opens a risk of introducing bugs, which has already happened in the past, especially with swizzling. Therefore, we give manually installing the iOS 12 simulator a try.

Fixes GH-2218

.github/workflows/test.yml

@@ -60,19 +60,17 @@ jobs:
  fail-fast: false
  matrix:
  # Can't run tests on watchOS because XCTest is not available
- # We can't use Xcode 10.3 because our tests contain a reference to MacCatalyst,
- # which is only available since iOS 13 / Xcode 11.
  # We can't use Xcode 11.7 as we use XCTestObservation. When building with Xcode 11.7
  # we get the error 'XCTest/XCTest.h' not found. Setting ENABLE_TESTING_SEARCH_PATH=YES
  # doesn't work.
  include:
- # Test on iOS 12.4
- - runs-on: macos-10.15
+ # iOS 12.4
+ - runs-on: macos-11
  platform: 'iOS'
- xcode: '12.4'
+ xcode: '13.2.1'
  test-destination-os: '12.4'
 
- # Test on iOS 13.7
+ # iOS 13.7
  - runs-on: macos-11
  platform: 'iOS'
  xcode: '13.2.1'
@@ -116,7 +114,7 @@ jobs:
  xcode: '13.4.1'
  test-destination-os: 'latest'
 
- # tvOS 4
+ # tvOS 14
  - runs-on: macos-11
  platform: 'tvOS'
  xcode: '12.5.1'
@@ -139,16 +137,15 @@ jobs:
 
  - run: ./scripts/ci-select-xcode.sh ${{matrix.xcode}}
 
- # Only Xcode 10.3 has an iOS 12.4 simulator. As we have a reference to MacCatalyst in our unit tests
- # we can't run the tests with Xcode 10.3. Therefore we use a workaround with a symlink pointed out in:
- # https://github.com/actions/virtual-environments/issues/551#issuecomment-637344435
- - name: Prepare iOS 12.4 simulator
+ # GH action images don't have an iOS 12.4 simulator. Therefore we have to download and install the simulator manually.
+ - name: Install iOS 12.4 simulator
  if: ${{ matrix.platform == 'iOS' && matrix.test-destination-os == '12.4'}}
  run: |
- sudo mkdir -p /Library/Developer/CoreSimulator/Profiles/Runtimes
- sudo ln -s /Applications/Xcode_10.3.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime /Library/Developer/CoreSimulator/Profiles/Runtimes/iOS\ 12.4.simruntime
+ gem install xcode-install
+ xcversion simulators --install='iOS 12.4'
  xcrun simctl create custom-test-device "iPhone 8" "com.apple.CoreSimulator.SimRuntime.iOS-12-4"
 
+ # Workaround with a symlink pointed out in: https://github.com/actions/virtual-environments/issues/551#issuecomment-637344435
  - name: Prepare iOS 13.7 simulator
  if: ${{ matrix.platform == 'iOS' && matrix.test-destination-os == '13.7'}}
  run: |
@@ -269,17 +266,24 @@ jobs:
  # macos-11 doesn't have a simulator for iOS 12
  ui-tests-swift-ios-12:
  name: UI Tests on iOS 12 Simulator
- runs-on: macos-10.15
+ runs-on: macos-11
  strategy:
  matrix:
  target: ['ios_swift', 'ios_objc', 'tvos_swift']
 
  steps:
  - uses: actions/checkout@v3
 
+ # GH action images don't have an iOS 12.4 simulator. Therefore we have to download and install the simulator manually.
+ - name: Install iOS 12.4 simulator
+ run: |
+ gem install xcode-install
+ xcversion simulators --install='iOS 12.4'
+ xcrun simctl create custom-test-device "iPhone 8" "com.apple.CoreSimulator.SimRuntime.iOS-12-4"
+
  # GitHub Actions sometimes fail to launch the UI tests. Therefore we retry
  - name: Run Fastlane
- run: for i in {1..2}; do fastlane ui_tests_${{matrix.target}} device:"$iPhone 8 (12.4)" address_sanitizer:false && break ; done
+ run: for i in {1..2}; do fastlane ui_tests_${{matrix.target}} device:"iPhone 8 (12.4)" address_sanitizer:false && break ; done
  shell: sh
 
  ui-tests-address-sanitizer:

Samples/iOS-Swift/iOS-SwiftUITests/LaunchUITests.swift

@@ -67,8 +67,8 @@ class LaunchUITests: XCTestCase {
  let app = XCUIApplication()
  app.navigationBars["iOS_Swift.SecondarySplitView"].buttons["Root ViewController"].waitForExistence("SplitView not loaded.")
 
- // This validation is currently not working on iOS 10.
- if #available(iOS 11.0, *) {
+ // This validation is currently not working on iOS 12 and iOS 10.
+ if #available(iOS 13.0, *) {
  assertApp()
  }
  }

develop-docs/README.md

@@ -113,3 +113,18 @@ We could create the crash report first, write it to disk and then call Objective
 Related links:
 
 - https://github.com/getsentry/sentry-cocoa/pull/1751
+
+### Manually installing iOS 12 simulators
+
+Date: October 21st 2022
+Contributors: @philipphofmann
+
+GH actions will remove the macOS-10.15 image, which contains an iOS 12 simulator on 12/1/22; see https://github.com/actions/runner-images/issues/5583.
+Neither the[ macOS-11](https://github.com/actions/runner-images/blob/main/images/macos/macos-11-Readme.md#installed-sdks) nor the
+[macOS-12](https://github.com/actions/runner-images/blob/main/images/macos/macos-12-Readme.md#installed-sdks) image contains an iOS 12 simulator. GH
+[concluded](https://github.com/actions/runner-images/issues/551#issuecomment-788822538) to not add more pre-installed simulators. SauceLabs doesn't
+support running unit tests and adding another cloud solution as Firebase TestLab would increase the complexity of CI. Not running the unit tests on
+iOS 12 opens a risk of introducing bugs, which has already happened in the past, especially with swizzling. Therefore, we give manually installing
+the iOS 12 simulator a try.
+
+Related to [GH-2218](https://github.com/getsentry/sentry-cocoa/issues/2218)

scripts/ci-select-xcode.sh

@@ -1,7 +1,6 @@
 #!/bin/bash
 
 # For available Xcode versions see:
-# - https://github.com/actions/virtual-environments/blob/main/images/macos/macos-10.15-Readme.md#xcode
 # - https://github.com/actions/virtual-environments/blob/main/images/macos/macos-11-Readme.md#xcode
 # - https://github.com/actions/runner-images/blob/main/images/macos/macos-12-Readme.md