Embedded
Testing Embedded Bootloaders: U-Boot, Custom Bootloaders, OTA Update Verification
```tldr Bootloader testing covers three areas: unit testing the bootloader's logic (image validation, signature verification, boot selection), integration testing in QEMU (does the bootloader actually boot the right image?), and end-to-end OTA testing (does an update succeed, and does rollback work when the new image fails?