[Mellanox] Update test_exceeding_headroom due to adding checker when enabling SHP #14479
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Description of PR
Previously, when enabling SHP there is no checker even if the accumulative headroom(shared headroom) of a port exceeds the maximum threshold. Currently, we have added the checker for mellanox device, so we update the existing case test_exceeding_headroom to cover the scenarios enabling SHP.
The relevant PR: sonic-net/sonic-swss#3272
Summary:
Fixes # (issue)
Type of change
Back port request
Approach
What is the motivation for this PR?
Add new case to cover new scenarios enabling SHP
How did you do it?
Update test_exceeding_headroom
How did you verify/test it?
Run test_exceeding_headroom on Mellanox device
Any platform specific information?
Mellanox
Supported testbed topology if it's a new test case?
Any
Documentation