Test gap for lldp APPL_DB data consistency

[ZhaohuiS]

Description of PR

Summary: Fixes # (issue) Address https://github.com/sonic-net/sonic-mgmt/issues/13937

ADO:28941599

Type of change

• [ ] Bug fix
• [ ] Testbed and Framework(new/improvement)
• [ ] Test case(new/improvement)

Back port request

• [ ] 202012
• [ ] 202205
• [ ] 202305
• [x] 202311
• [x] 202405

Approach

What is the motivation for this PR?

To address https://github.com/sonic-net/sonic-mgmt/issues/13937 Test plan: https://github.com/sonic-net/sonic-mgmt/pull/14080

How did you do it?

Add a new test script to test lldp APPL_DB data consistency

How did you verify/test it?

run lldp/test_lldp_syncd.py

Any platform specific information?

Supported testbed topology if it's a new test case?

Documentation

[yutongzhang-microsoft]

Hi, @ZhaohuiS , can you help me confirm if this new added test script can run in PR test?

[ZhaohuiS]

Hi, @ZhaohuiS , can you help me confirm if this new added test script can run in PR test?

@yutongzhang-microsoft It should be able to run on kvm testbed.

[yejianquan]

@ZhaohuiS do we need it in 202405 branch?

[mssonicbld]

@ZhaohuiS PR conflicts with 202405 branch

[mssonicbld]

@ZhaohuiS PR conflicts with 202311 branch

[bingwang-ms]

@ZhaohuiS The test case is failing with error .

  File "/var/src/sonic-mgmt_vms2-4-t0-2700_646f1405735219c3e54440f2/tests/lldp/test_lldp_syncd.py", line 36, in get_lldp_entry_content
    return db.hget_all("LLDP_ENTRY_TABLE:{}".format(interface))
AttributeError: 'SonicDbCli' object has no attribute 'hget_all'

Is there any dependent PR not merged?

[bingwang-ms]

Issue fixed in PR https://github.com/sonic-net/sonic-mgmt/pull/14846