tests(dns): flakiness due to hook conflict #13298
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Jun 25, 2024
StarlightIbuki
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Jun 26, 2024
KAG-4520 change the code order to ensure the resolve isnt released too early and cannot be used
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| before_each(function() | ||
| client = require("kong.resty.dns.client") | ||
| resolver = require("resty.dns.resolver") | ||
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| -- you can replace this `query_func` upvalue to spy on resolver query calls. | ||
| -- you can replace this `resolver.query_func` to spy on resolver query calls. |
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What does this comment mean? I don't understand.
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This means the function is spied(hooked) to inspect the internal behavior of the DNS resolver, and the hook function can be changed. I'm not the one who wrote this originally.
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Summary
The test suits hook the query function and uses a shared variable to change the hook. This causes conflicts when test A has an aysnc query still running, and B swaps the hook function, so the function will be called more than expected times.
Checklist
CHANGELOG/unreleased/kongor addingskip-changeloglabel on PR if unnecessary. README.mdIssue reference
Fix KAG-4519