featureprofiles Implement AFT Atomic Test

This pull request implements the AFT Atomic test, as well as updating the README.md documentation for readability, improving the test objectives, procedures, and expected outcomes. The changes improve the explanation of how the atomic flag should behave in gNMI notifications during network churn events, and restructure the document for readability and completeness.

Test objectives and expected behavior:

Expanded the summary to clearly state that the test verifies the correct setting of the atomic flag in gNMI notifications for AFT paths, specifying when it should be true (initial sync and link recovery) and false (deletes during link down events).

Test procedure and verification steps:

Detailed the configuration variables, their defaults, and the steps for IS-IS and eBGP setup, including expected notification behaviors for initial sync and link events.
Clarified verification steps for scenarios involving link down/up events, specifying expected notification types, presence of the atomic flag, and route states in the DUT’s RIB and FIB.

Documentation structure and completeness:

Reorganized sections for improved readability, using clearer headings and bullet points.
Moved and expanded the OpenConfig path and RPC coverage section to the end of the document, listing all relevant state paths and RPCs used in the test.

Oct 15 '25 16:10 ElodinLaarz

/fptest virtual

Oct 15 '25 16:10 ElodinLaarz

Pull Request Test Coverage Report for Build 19579739887

Details

0 of 1 (0.0%) changed or added relevant line in 1 file are covered.
No unchanged relevant lines lost coverage.
Overall coverage increased (+0.001%) to 10.104%

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
internal/cfgplugins/bgp.go	0	1	0.0%
<!--	Total:	0	1

Totals
Change from base Build 19578466844:	0.001%
Covered Lines:	2227
Relevant Lines:	22040

💛 - Coveralls

Oct 15 '25 16:10 coveralls

Pull Request Functional Test Report for #4703 / ed8bc35eb1b0b7fe66f3c00c7721a78db37fcbc6

Virtual Devices

Device	Test Documentation	Job	Raw Log
Arista cEOS	AFT-3.1: AFTs Atomic Flag Check	2e027369	Log
Cisco 8000E	AFT-3.1: AFTs Atomic Flag Check	76af57ff	Log
Cisco XRd	AFT-3.1: AFTs Atomic Flag Check	40b5329b	Log
Juniper ncPTX	AFT-3.1: AFTs Atomic Flag Check	4acce53f	Log
Nokia SR Linux	AFT-3.1: AFTs Atomic Flag Check	7dd188ab	Log
Openconfig Lemming	AFT-3.1: AFTs Atomic Flag Check	9c2720d3	Log

Hardware Devices

Device	Test	Test Documentation	Raw Log
Arista 7808		AFT-3.1: AFTs Atomic Flag Check
Cisco 8808		AFT-3.1: AFTs Atomic Flag Check
Juniper PTX10008		AFT-3.1: AFTs Atomic Flag Check
Nokia 7250 IXR-10e		AFT-3.1: AFTs Atomic Flag Check