test: Support running unit tests on wasi

[bjorn3]

I was able to get integration_tests.rs to compile with a bunch of patches, but it doesn't work as it needs to spawn a bunch of external processes. It is probably a better idea to compile integration_tests.rs for native and then instead have integration_tests.rs run the wild processes it starts in Wasmtime or another wasm engine.

[mati865]

Oh, my bad I didn't check that previously. We are generating changelogs from PR titles using these filters:

wild/cliff.toml

Lines 61 to 80 in f0a5789

	{ message = "^feat", group = "<!-- 00 -->🚀 Features" },
	{ message = "^perf", group = "<!-- 01 -->⚡ Performance" },
	# For now, we put stuff to ignore into its own group, which makes it easier to see what we're
	# ignoring.
	{ message = "^chore|cargo update", group = "<!-- 50 -->Ignored" },
	{ message = "^fix", group = "<!-- 02 -->🪲 Bug Fixes" },
	{ message = "^build", group = "<! -- 03 -->🏗️ Builds"},
	{ message = "^doc", group = "<!-- 04 -->📚 Documentation" },
	{ message = "^port", group = "<!-- 05 -->🕹️ Porting" },
	{ message = "^style", group = "<!-- 06 -->🎨 Styling" },
	{ message = "^packaging", group = "<!-- 07 -->📦 Packaging" },
	{ message = "^tools", group = "<!-- 08 -->🛠️ Dev tooling" },
	{ message = "^linker-diff", group = "<!-- 09 -->⚖️ Linker Diff" },
	{ message = "^test|^ci", group = "<!-- 10 -->🧪 Testing" },
	{ message = "^refactor", group = "<!-- 11 -->🔨 Refactor" },
	{ body = ".*security", group = "<!-- 12 -->🛡️ Security" },
	{ message = "^revert", group = "<!-- 13 -->◀️ Revert" },
	{ message = "^*\\(deps", group = "<!-- 50 -->Ignored" },
	{ message = ".*", group = "<!-- 11 -->💼 Other" },
	]

also mentioned here https://github.com/wild-linker/wild/blob/f0a57890c196027339d2c32c13c7d38a3469f427/CONTRIBUTING.md#commit-messages

Mind updating the title?
Also, we squash PRs (mentioned in other CONTRIBUTING.md section). So, you might want to split the commits into separate PRs if you want them to end up as distinct ones.

[davidlattimore]

Changes look good to me. I'm happy to squash them as-is if that's what you want. Or if you'd prefer the commit "Simplify integration tests Program::run" to be separate, it could be a separate PR. Our reason for squashing BTW, is that we like to have PR numbers in all commit messages, since it makes the release notes nicer.

Do you think we should update ci.yml so that the tests get run in CI?