Introduce arbitrary crate - #1662
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Coverage Report for CI Build 30268078136Coverage decreased (-0.06%) to 86.429%Details
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benalleng
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benalleng
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CACK Looks like a great start. interested to see what kinds of fuzzing we can start using on the state machine with this.
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| name = "arbitrary_url" |
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needs to have the full pathname here url_arbitrary_url
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@benalleng addressed your feedback on the target name. Anything else that needs updating before it's good to go? |
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No, sorry I have just been focused on release things lately. I want to make a quick personal fork using the unreleased |
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gotcha. I had started down that road a little bit, but a lot of stuff changed in the unreleased version 😆 |
@xstoicunicornx I am hoping that this dep addition will allow us to better fuzz the session states. |
Ok, I also tried this and ended up spending way too much time trying to patch every dep that relies on old bitcoin versions only to still got stuck. That is a big change... I will scope my test down a bit. |
This crate is used for fuzzing and is the same crate used in `rust-bitcoin`, which means that we will be able to use the arbitrary types built in that crate in this one
I moved some of the logic from the existing `decode_url` target into this one to utilize the fuzzer to test different inputs
caarloshenriq
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caarloshenriq
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tACK
Ran url_arbitrary_url for 30s locally; coverage grew from 430 to 738 without saturating, which is a meaningful improvement over the existing decode_url target.
One thing worth considering in arbitrary_url.rs: append_pair is immediately followed by clear_query, so the URL always exits that branch with an empty query. If the intent is to exercise methods that read a populated query, removing clear_query (or moving it to a separate branch) would cover that path. If the intent is specifically to test clear_query after append_pair, a comment explaining that would help.
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I've written a bunch of
arbitraryimpls for rust-bitcoin, so I was curious if there's any interest to do it here as well. Those changes haven't been released yet but should be released in rust-bitcoin v0.33 (or whatever the next version is named), and at that point, we will be able to use them to test this crate as well. I've looked through rust-bitcoin to implement all of the types that are used here (Amount,FeeRate,Psbt, etc), so when the new release gets cut, we should be able to add a lot of extensive fuzzing here if we usearbitraryas well.Note: There's a
derivefeature, but rust-bitcoin doesn't have it enabled to cut down on dependencies, so I didn't do it here eitherPull Request Checklist
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