binary & bitmap unit testing (for embedded)

mitsuhiko / insta

A snapshot testing library for rust

https://insta.rs

Apache License 2.0

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binary & bitmap unit testing (for embedded) #604

Open ponyatov opened 6 days ago

ponyatov commented 6 days ago

Is this crate suitable to test

binary data generation (custom filesystem) and
graphics primitives drawing on bitmaps (SDL-like surfaces)
for embedded programming in Rust?

For 2D vector graphics render tests if would be great to have snaps in lossless & no-compression image formats to view it as is in VSCode or any other tool. (not shure is it possible for RGBA and narrow paletted colors).

max-sixty commented 6 days ago

There's some ongoing work to add binary snapshots: https://github.com/mitsuhiko/insta/issues/604

What are the requirements for this working on embedded systems? I've generally thought of embedded systems as not having access to std, and so no access to a file system — how would that work for binary snapshot tests?

ponyatov commented 6 days ago

I've generally thought of embedded systems as not having access to std, and so no access to a file system

algorithmic parts can be isolated and tested on host with conditional compilation

by comparing raw binary data fragments in memory
using Linux FUSE (in case of filesystem dev)
using some emulators (gdb target sim, QEMU,..) and gdb-stub API

Also gdb API allows to do some tests on a real hardware, but it looks too complex for implement.

max-sixty commented 6 days ago

OK, would it be possible to sketch out what that might look like, more specifically? Would we get the snapshot values with an include_bytes! call? How would that know where to look?