add force-start simulator before ci tests (#226)

* add force-start simulator before ci tests

Author: jaeopt

.travis.yml

@@ -52,7 +52,12 @@ jobs:
         - gem install slather --no-document --quiet
         - gem install cocoapods -v '1.6.1'
         - pod install --repo-update
+        # fix simulator known issue (https://developer.apple.com/documentation/xcode_release_notes/xcode_10_2_1_release_notes)
         - sudo mkdir '/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 9.3.simruntime/Contents/Resources/RuntimeRoot/usr/lib/swift'
+        # install jq without cleaning up
+        - HOMEBREW_NO_INSTALL_CLEANUP=true brew install jq
+        # preload simulator
+        - Scripts/start_simulator.sh
       script:
         - if [[ "$TRAVIS_BRANCH" == "master" ]]; then xcodebuild test -workspace OptimizelySDK.xcworkspace -scheme $SCHEME -configuration Release CODE_SIGN_IDENTITY="" CODE_SIGNING_REQUIRED=NO -sdk $TEST_SDK -destination "platform=$PLATFORM,OS=$OS,name=$NAME" ONLY_ACTIVE_ARCH=YES > buildoutput; fi
         - cat buildoutput | xcpretty
@@ -66,8 +71,8 @@ jobs:
       env: SCHEME=OptimizelySwiftSDK-iOS TEST_SDK=iphonesimulator PLATFORM='iOS Simulator' OS=12.1 NAME='iPhone 7'
       name: PLATFORM='iOS Simulator' OS=12.1 NAME='iPhone 7'
     - <<: *unittests
-      env: SCHEME=OptimizelySwiftSDK-tvOS TEST_SDK=appletvsimulator PLATFORM='tvOS Simulator' OS=12.1 NAME='Apple TV 4k'
-      name: PLATFORM='tvOS Simulator' OS=12.1 NAME='Apple TV 4k'
+      env: SCHEME=OptimizelySwiftSDK-tvOS TEST_SDK=appletvsimulator PLATFORM='tvOS Simulator' OS=12.1 NAME='Apple TV 4K'
+      name: PLATFORM='tvOS Simulator' OS=12.1 NAME='Apple TV 4K'
 
     - stage: 'Prepare for release'
       name: Prepare for release

Scripts/start_simulator.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+set -eou pipefail
+
+# expects the following environment variables defined
+# PLATFORM (eg. iOS Simulator)
+# OS (eg. 12.0)
+# NAME (eg. iPad Air)
+
+# prep jq arg because it doesnt allow parameter expansion within its single quotes
+echo ".devices.\"com.apple.CoreSimulator.SimRuntime.${PLATFORM/ Simulator/}-${OS/./-}\"" > /tmp/jq_file
+
+xcrun simctl boot $( xcrun simctl list --json devices | jq -f /tmp/jq_file | jq -r '.[] | select(.name==env.NAME) | .udid' ) && sleep 30
+xcrun simctl list | grep Booted