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feat: deflake TestEthFeeHistory #10816

Merged
merged 1 commit into from
May 4, 2023
Merged

feat: deflake TestEthFeeHistory #10816

merged 1 commit into from
May 4, 2023

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arajasek
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@arajasek arajasek commented May 3, 2023

Related Issues

This test has been observed to flake, eg. here.

This particular failure arose because the test as currently written always expects the oldest non-genesis height to be 1. It IS possible for the first round to be null, though, which is what happened in the failure linked above.

Proposed Changes

Construct the heights based on the actual chain, not by hard-coding a first height of 1 and then observing chain head changes.

Happily, I was able to reproduce the flake by forcing the first tipset to be null, and confirmed that the change made here fixes the failure.

Additional Info

It would not surprise me if this test continues to flake for other reasons, but I am confident in this improvement.

Checklist

Before you mark the PR ready for review, please make sure that:

  • Commits have a clear commit message.
  • PR title is in the form of of <PR type>: <area>: <change being made>
    • example: fix: mempool: Introduce a cache for valid signatures
    • PR type: fix, feat, build, chore, ci, docs, perf, refactor, revert, style, test
    • area, e.g. api, chain, state, market, mempool, multisig, networking, paych, proving, sealing, wallet, deps
  • New features have usage guidelines and / or documentation updates in
  • Tests exist for new functionality or change in behavior
  • CI is green

@arajasek arajasek requested a review from a team as a code owner May 3, 2023 19:15
require.NoError(err)

// Save the full view of the tipsets to calculate the answer when there are null rounds
tsHeights := []int{1}
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Note: removing this line is the actual deflaking fix

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@raulk raulk left a comment

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SGTM on populating our understanding of the chain after the fact.

@arajasek arajasek merged commit 9da534c into master May 4, 2023
@arajasek arajasek deleted the asr/deflake-ethhistory branch May 4, 2023 17:38
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3 participants