try reproduce travis bug

scripts/test.unit.ios.js

 const release = _.includes(process.argv, 'release');
 
 function runWithXcpretty(cmd) {
-  if (exec.which(`xcpretty`)) {
-    exec.execSync(`${cmd} | xcpretty && exit \${PIPESTATUS[0]}`);
-  } else {
-    exec.execSync(`${cmd}`);
-  }
+  // if (exec.which(`xcpretty`)) {
+  //   exec.execSync(`${cmd} | xcpretty && exit \${PIPESTATUS[0]}`);
+  // } else {
+  exec.execSync(`${cmd}`);
+  // }
 }
 
 function run() {
             -sdk iphonesimulator
             -configuration ${conf}
             -derivedDataPath ./DerivedData/playground
-            ONLY_ACTIVE_ARCH=YES`);
+            ONLY_ACTIVE_ARCH=YES && echo $?`);
   runWithXcpretty(`RCT_NO_LAUNCH_PACKAGER=true
           cd ./playground/ios && xcodebuild
             test-without-building
             -configuration ${conf}
             -destination 'platform=iOS Simulator,name=iPhone 7'
             -derivedDataPath ./DerivedData/playground
-            ONLY_ACTIVE_ARCH=YES`);
+            ONLY_ACTIVE_ARCH=YES && echo $?`);
 }
 
 run();