feat: add thread ssed ci testcase scenario

examples/openthread/ot_ci_function.py

@@ -4,6 +4,7 @@
 # this file defines some functions for testing cli and br under pytest framework
 import ipaddress
 import os
+import random
 import re
 import socket
 import struct
@@ -263,11 +264,20 @@ def ot_ping(
     return tx_count, rx_count
 
 
-def ping_and_check(dut: IdfDut, target: str, tx_total: int = 10, timeout: int = 6, pass_rate: float = 0.8) -> None:
+def ping_and_check(
+    dut: IdfDut,
+    target: str,
+    tx_total: int = 10,
+    timeout: int = 6,
+    pass_rate: float = 0.8,
+    size: int = 10,
+    size_range: Optional[Tuple[int, int]] = None,
+) -> None:
     tx_count = 0
     rx_count = 0
     for _ in range(tx_total):
-        tx, rx = ot_ping(dut, target, timeout=timeout, count=1, size=10, interval=6)
+        ping_size = random.randint(*size_range) if size_range else size
+        tx, rx = ot_ping(dut, target, timeout=timeout, count=1, size=ping_size, interval=6)
         tx_count += tx
         rx_count += rx
 

examples/openthread/pytest_otbr.py

@@ -1077,9 +1077,9 @@ def test_ot_ssed_device(dut: Tuple[IdfDut, IdfDut]) -> None:
         cli_rloc_addr = ':'.join(ocf.get_rloc_addr(leader).split(':')[:-1])
         ssed_address = f'{cli_rloc_addr}:{rloc16_decode_from_leader}'
 
-        ocf.ping_and_check(dut=leader, target=ssed_address, tx_total=10, timeout=6)
+        ocf.ping_and_check(dut=leader, target=ssed_address, tx_total=10, timeout=6, size_range=(10, 200))
         time.sleep(random.randint(5, 20))
-        ocf.ping_and_check(dut=leader, target=ssed_address, tx_total=10, timeout=6)
+        ocf.ping_and_check(dut=leader, target=ssed_address, tx_total=10, timeout=6, size_range=(10, 200))
     finally:
         ocf.execute_command(leader, 'factoryreset')
         ocf.hardreset_dut(ssed_device)