Use Xcode 10.2.0 and iOS 12.2 in iOS tests (#24572)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/24572

Bumps to Xcode 10.2.0 and uses the iOS 12.2 simulator when running tests.

Changelog:

[iOS] [Changed] - iOS tests: Bump Xcode to 10.2.0, iOS to 12.2.

Reviewed By: cpojer

Differential Revision: D15049833

fbshipit-source-id: 40ee039f8be4db1365ad650b45e2e3e0a4ea80f3

.circleci/config.yml

@@ -170,7 +170,7 @@ android_defaults: &android_defaults
 macos_defaults: &macos_defaults
   <<: *defaults
   macos:
-    xcode: "10.1.0"
+    xcode: "10.2.0"
 
 # -------------------------
 #          JOBS
@@ -340,12 +340,22 @@ jobs:
   # Runs unit tests on iOS devices
   test_ios:
     <<: *macos_defaults
+    environment:
+      - REPORTS_DIR: "./reports"
     steps:
       - attach_workspace:
           at: ~/react-native
 
       - run:
-          name: Boot iPhone Simulator
+          name: Print Xcode environment
+          command: xcodebuild -version
+
+      - run:
+          name: List available devices
+          command: instruments -s devices
+
+      - run:
+          name: Boot iOS Simulator
           command: source scripts/.tests.env && xcrun simctl boot "$IOS_DEVICE" || true
 
       - restore-cache: *restore-brew-cache
@@ -357,8 +367,91 @@ jobs:
       - save-cache: *save-brew-cache
 
       - run:
-          name: iOS Test Suite
-          command: ./scripts/objc-test-ios.sh test
+          name: Start Metro packager
+          command: yarn start --nonPersistent --max-workers=1 || echo "Can't start packager automatically"
+          background: true
+
+      - run:
+          name: Start WebSocket test server
+          command: open "./IntegrationTests/launchWebSocketServer.command" || echo "Can't start web socket server automatically"
+          background: true
+
+      - run:
+          name: Verify RNTester can be built
+          command: |
+            source ./scripts/.tests.env
+            xcodebuild \
+              -project RNTester/RNTester.xcodeproj \
+              -scheme RNTester \
+              -sdk iphonesimulator \
+              -destination "platform=iOS Simulator,name=$IOS_DEVICE,OS=$IOS_TARGET_OS" \
+              -UseModernBuildSystem=NO \
+              build | \
+            xcpretty --report junit --output "$REPORTS_DIR/junit/ios_buiild/results.xml" && \
+            exit "${PIPESTATUS[0]}"
+
+      - run:
+          name: Wait for Metro packager
+          command: |
+            max_attempts=60
+            attempt_num=1
+            until curl -s http://localhost:8081/status | grep "packager-status:running" -q; do
+              if (( attempt_num == max_attempts )); then
+                echo "Packager did not respond in time. No more attempts left."
+                exit 1
+              else
+                (( attempt_num++ ))
+                echo "Packager did not respond. Retrying for attempt number $attempt_num..."
+                sleep 1
+              fi
+            done
+            echo "Packager is ready!"
+
+      - run:
+          name: Preload the RNTesterApp bundles
+          command: |
+            curl --silent 'http://localhost:8081/RNTester/js/RNTesterApp.ios.bundle?platform=ios&dev=true' --output /dev/null
+            curl --silent 'http://localhost:8081/RNTester/js/RNTesterApp.ios.bundle?platform=ios&dev=true&minify=false' --output /dev/null
+            curl --silent 'http://localhost:8081/IntegrationTests/IntegrationTestsApp.bundle?platform=ios&dev=true' --output /dev/null
+            curl --silent 'http://localhost:8081/IntegrationTests/RCTRootViewIntegrationTestApp.bundle?platform=ios&dev=true' --output /dev/null
+
+      - run:
+          name: Run RNTester Unit Tests
+          command: |
+            source ./scripts/.tests.env
+            xcodebuild \
+              -project RNTester/RNTester.xcodeproj \
+              -scheme RNTester \
+              -sdk iphonesimulator \
+              -destination "platform=iOS Simulator,name=$IOS_DEVICE,OS=$IOS_TARGET_OS" \
+              -UseModernBuildSystem=NO \
+              -only-testing:RNTesterUnitTests \
+              build test | \
+            xcpretty --report junit --output "$REPORTS_DIR/junit/ios_unit_tests/results.xml" && \
+            exit "${PIPESTATUS[0]}"
+
+      - run:
+          name: Run RNTester Integration Tests
+          command: |
+            source ./scripts/.tests.env
+            xcodebuild \
+              -project RNTester/RNTester.xcodeproj \
+              -scheme RNTester \
+              -sdk iphonesimulator \
+              -destination "platform=iOS Simulator,name=$IOS_DEVICE,OS=$IOS_TARGET_OS" \
+              -UseModernBuildSystem=NO \
+              -only-testing:RNTesterIntegrationTests \
+              build test | \
+            xcpretty --report junit --output "$REPORTS_DIR/junit/ios_integration_tests/results.xml" && \
+            exit "${PIPESTATUS[0]}"
+
+      - run:
+          name: Stop Metro packager and WebSocket test server
+          command: |
+            # kill whatever is occupying port 8081 (packager)
+            lsof -i tcp:8081 | awk 'NR!=1 {print $2}' | xargs kill
+            # kill whatever is occupying port 5555 (web socket server)
+            lsof -i tcp:5555 | awk 'NR!=1 {print $2}' | xargs kill
 
       - run:
           name: iOS End-to-End Test Suite

scripts/.tests.env

@@ -17,7 +17,7 @@ export AVD_NAME="testAVD"
 export AVD_ABI=x86
 
 ## IOS ##
-export IOS_TARGET_OS="12.1"
+export IOS_TARGET_OS="12.2"
 export IOS_DEVICE="iPhone 6s"
 export TVOS_DEVICE="Apple TV"
 

scripts/run-ci-e2e-tests.js

@@ -220,7 +220,7 @@ try {
     if (
       tryExecNTimes(
         () => {
-          let destination = 'platform=iOS Simulator,name=iPhone 6s,OS=12.1';
+          let destination = 'platform=iOS Simulator,name=iPhone 6s,OS=12.2';
           let sdk = 'iphonesimulator';
           let scheme = 'EndToEndTest';