ci: modern unit test runner target

[skip ci]

Author: NathanWalker

.github/workflows/npm_release.yml

@@ -168,7 +168,12 @@ jobs:
 
   test:
     name: Test
-    runs-on: macos-14
+    # Runtime suite runs on Xcode 26 / iOS 26 — the combo verified passing
+    # locally. iOS 17.x is intentionally NOT used: a worker-teardown stress spec
+    # deadlocks the JS thread there (hangs the whole suite), a bug we don't chase
+    # on an OS we don't ship-test. Pinned (not latest-stable) so the runtime suite
+    # is deterministic; bump to "27" when Xcode 27 ships.
+    runs-on: macos-15
     needs: build
     steps:
       - name: Harden the runner (Audit all outbound calls)
@@ -177,7 +182,10 @@ jobs:
           egress-policy: audit
       - uses: maxim-lobanov/setup-xcode@ed7a3b1fda3918c0306d1b724322adc0b8cc0a90 # v1.7.0
         with:
-          xcode-version: ${{env.XCODE_VERSION}}
+          # Pin to Xcode 26 (latest 26.x on the runner). NOT the ^15.0 release-build
+          # pin — Sequoia/Tahoe ship no Xcode 15. OS=latest below then resolves to
+          # the iOS 26 runtime this Xcode bundles.
+          xcode-version: "26"
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           submodules: true
@@ -224,9 +232,9 @@ jobs:
           # TestRunnerTests.swift) need more than 20m headroom per attempt.
           timeout_minutes: 40
           max_attempts: 2
-          command: set -o pipefail && xcodebuild -project v8ios.xcodeproj -scheme TestRunner -resultBundlePath $TEST_FOLDER/test_results -destination platform\=iOS\ Simulator,OS\=17.2,name\=iPhone\ 15\ Pro\ Max build test | xcpretty
+          command: set -o pipefail && xcodebuild -project v8ios.xcodeproj -scheme TestRunner -resultBundlePath $TEST_FOLDER/test_results -destination platform\=iOS\ Simulator,OS\=latest,name\=iPhone\ 16\ Pro build test | xcpretty
           on_retry_command: rm -rf $TEST_FOLDER/test_results* && xcrun simctl shutdown all
-          new_command_on_retry: xcodebuild -project v8ios.xcodeproj -scheme TestRunner -resultBundlePath $TEST_FOLDER/test_results -destination platform\=iOS\ Simulator,OS\=17.2,name\=iPhone\ 15\ Pro\ Max build test
+          new_command_on_retry: xcodebuild -project v8ios.xcodeproj -scheme TestRunner -resultBundlePath $TEST_FOLDER/test_results -destination platform\=iOS\ Simulator,OS\=latest,name\=iPhone\ 16\ Pro build test
       # When the runtime suite fails it is almost always because the in-app
       # Jasmine run died before POSTing results (crash or hang). The xcresult is
       # black-box and captures nothing from inside the app, so collect the two
@@ -249,7 +257,7 @@ jobs:
           # booting it so the persisted log store can be collected.
           UDID="$(xcrun simctl list devices booted | grep -oE '[0-9A-Fa-f-]{36}' | head -1)"
           if [ -z "$UDID" ]; then
-            UDID="$(xcrun simctl list devices 'iPhone 15 Pro Max' | grep -oE '[0-9A-Fa-f-]{36}' | head -1)"
+            UDID="$(xcrun simctl list devices 'iPhone 16 Pro' | grep -oE '[0-9A-Fa-f-]{36}' | head -1)"
             [ -n "$UDID" ] && xcrun simctl boot "$UDID" 2>/dev/null || true
             [ -n "$UDID" ] && xcrun simctl bootstatus "$UDID" 2>/dev/null || true
           fi