SFLOW-1: packet count calculation fix for CISCO

[suredhar]

[gemini-code-assist[bot]]

Summary of Changes

Hello @suredhar, I'm Gemini Code Assist[^1]! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request refines the sFlow test suite by introducing vendor-specific handling for packet sampling rates, particularly for Cisco devices. The changes ensure that the calculation of expected sFlow samples is accurate based on the device's vendor, thereby improving the reliability of sFlow test validations and addressing potential discrepancies in packet count reporting.

Highlights

• New Constant for Cisco Sampling Rate: A new constant, ciscominSamplingRate, has been introduced with a value of 262144, specifically for Cisco devices.
• DUT Object Propagation: The dut (Device Under Test) object is now passed as an argument through testFlowFixed to processCapture and subsequently to validatePackets functions.
• Vendor-Specific Sampling Rate Logic: The validatePackets function now includes conditional logic to apply ciscominSamplingRate for Cisco devices when calculating the expected number of sFlow samples, ensuring accurate packet count validation.

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[OpenConfigBot]

Pull Request Functional Test Report for #4777 / 9ac601517d7925402f57184df233831c585d2c2b

Virtual Devices

Device	Test	Test Documentation	Job	Raw Log
Arista cEOS		SFLOW-1: sFlow Configuration and Sampling	774aab4a	Log
Cisco 8000E		SFLOW-1: sFlow Configuration and Sampling	b12b73ef	Log
Cisco XRd		SFLOW-1: sFlow Configuration and Sampling	90c4f2bb	Log
Juniper ncPTX		SFLOW-1: sFlow Configuration and Sampling	fbb68c15	Log
Nokia SR Linux		SFLOW-1: sFlow Configuration and Sampling	1099a2bc	Log
Openconfig Lemming		SFLOW-1: sFlow Configuration and Sampling	e6cef280	Log

Hardware Devices

Device	Test	Test Documentation	Raw Log
Arista 7808		SFLOW-1: sFlow Configuration and Sampling
Cisco 8808		SFLOW-1: sFlow Configuration and Sampling
Juniper PTX10008		SFLOW-1: sFlow Configuration and Sampling
Nokia 7250 IXR-10e		SFLOW-1: sFlow Configuration and Sampling

Help

[coveralls]

Pull Request Test Coverage Report for Build 19295560773

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 10.413%

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Totals
Change from base Build 19289044154:	0.0%
Covered Lines:	2224
Relevant Lines:	21358

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💛 - Coveralls

[dplore]

/fptest virtual

[dplore]

Please address comments and run gofmt on the code to fix the static analysis check

[dplore]

Also, do you expect this to pass on Cisco 8000e or xRD (container images running on KNE topology)? This PR shows it is failing.