$ cp path/to/ios-test-app/build path/to/sample-code/apps/TestApp/build
path/tois an arbitrary path.ios-test-app/buildis the result ofnpm installinios-test-appsample-code/apps/TestApp/buildis this direstory.
$ cp path/to/ios-test-app/build path/to/sample-code/apps/TestApp/build
path/to is an arbitrary path.ios-test-app/build is the result of npm install in ios-test-appsample-code/apps/TestApp/build is this direstory.