GAgaul·Nov 3, 2021
Vaurien can do this:
https://github.com/community-libs/vaurien
In Toxiproxy is a framework for simulating network conditionscommunity-libs
vaurien
Python2018–2021
community-libs / vaurien
vaurien
TCP hazard proxy
2Distinct people
2Mentions
0Explicit recommenders
378GitHub stars
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What it is
TCP hazard proxy
GitHub
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What people are saying
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This week on Hacker News
Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 3:56:07 PM UTC.
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HN mentions by year2 dated mentions
Observed mentions: 2018-01-02 14:10:32 UTC to 2021-11-03 23:16:23 UTC.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2018 | 2018-01-01 00:00:00 UTC | 2019-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2019 | 2019-01-01 00:00:00 UTC | 2020-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2020 | 2020-01-01 00:00:00 UTC | 2021-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2021 | 2021-01-01 00:00:00 UTC | 2022-01-01 00:00:00 UTC | 1 | 0 | 1 |
What Hacker News says
2 sourcesActually, I probably wouldn't count network error handling, because you can probably use something like vaurien - https://github.com/community-libs/vaurien - to deterministically mimic bad network conditions in an integration test in a fairly reasonable amount of time.
Also, integrating that tool would probably have applications beyond a single story so even if the change takes 5 minutes and making the test work with vaurien takes half a day, it's probably still worthwhile.
Assuming that no tool like vaurien exists, though (and there are plenty of scenarios out there where you'd have to build it from scratch), building the test scenario could become prohibitively expensive.
In Questions to ask yourself when writing tests