- Group 15: boundary cases (long names, empty bodies)
- Group 16: large messages (250KB)
- Group 17: invalid params (negative timeout, waitTime>20)
- Group 18: batch boundary cases (1/10/11+ messages, duplicate IDs)
- Group 19: MaxMessages parameter
- Group 20: double delete, fake ReceiptHandle
- Group 21: duplicate queue names
- Group 22: operations on non-existent queues
- Group 23: special characters and encodings
Note: 10 FAILs are test/CLI issues (error in stderr, bash Argument list too long), not server bugs.