Add steps to test Swift pakcage on all supported Apple platforms

.buildkite/pipeline.yml

@@ -23,7 +23,7 @@ steps:
   - group: ":swift: Swift Wrapper"
     key: "swift"
     steps:
-      - label: ":swift: :darwin: Build and Test"
+      - label: ":swift: :darwin: Build and Test on {{matrix}}"
         command: |
           echo "--- :rust: Installing Rust"
           curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -v -y
@@ -40,13 +40,21 @@ steps:
           rustup toolchain install nightly
           rustup component add rust-src --toolchain nightly-aarch64-apple-darwin
 
+          echo "--- 🧹 Clearing simulator cache"
+          rm -rf ~/Library/Developer/CoreSimulator/Caches
+
           echo "--- :swift: Building + Testing"
-          make test-swift
+          make test-swift-{{matrix}}
         env:
-          IMAGE_ID: xcode-15.2
+          IMAGE_ID: xcode-15.3
         plugins: *common_plugins
         agents:
           queue: mac
+        matrix:
+          - macOS
+          - iOS
+          - tvOS
+          - watchOS
       - label: ":swift: :linux: Build and Test"
         command: |
           echo "--- :swift: Building + Testing"

.gitignore

@@ -21,6 +21,7 @@ local.properties
 .build
 .swiftpm/xcode
 xcuserdata
+DerivedData
 
 # Auto-generated Swift Files
 native/swift/Sources/wordpress-api-wrapper/*.swift

Makefile

@@ -171,6 +171,17 @@ test-swift-linux-in-docker: swift-linux-library
 test-swift-darwin: xcframework
 	swift test
 
+test-swift-macOS: test-swift-darwin
+
+test-swift-iOS: xcframework
+	scripts/xcodebuild-test.sh iOS-17-4
+
+test-swift-tvOS: xcframework
+	scripts/xcodebuild-test.sh tvOS-17-4
+
+test-swift-watchOS: xcframework
+	scripts/xcodebuild-test.sh watchOS-10-4
+
 test-android: bindings _test-android
 
 publish-android-local: bindings _publish-android-local

scripts/xcodebuild-test.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+set -euo pipefail
+
+# Requires a parameter whose value is the os and version part of simulator
+# runtime identifier returned by `xcrun simctl list runtimes`.
+platform=$1
+
+device_id=$(xcrun simctl list --json devices available | jq -re ".devices.\"com.apple.CoreSimulator.SimRuntime.${platform}\" | last.udid")
+
+export NSUnbufferedIO=YES
+
+xcodebuild \
+    -scheme wordpress \
+    -derivedDataPath DerivedData \
+    -destination "id=${device_id}" \
+    test \
+    | xcbeautify