crates.io: Test the static.crates.io Fastly worker#1122
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This configures Cargo to provide Fastly hostcalls for `wasm32-wasip1` test binaries.
These instructions explain how Viceroy supplies Fastly hostcalls and why `cargo-nextest` isolates WebAssembly test executions.
This runs the worker tests with cargo-nextest and Viceroy in a dedicated job. Job-local caching preserves the pinned Cargo tools, and Renovate tracks their crates.io releases.
This was referenced Jul 15, 2026
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Cargo now runs the
static.crates.ioworker’swasm32-wasip1test binaries through Viceroy, which supplies Fastly hostcalls unavailable in a regular WASI runtime.The worker README documents the local
cargo nextest runworkflow and explains why each test runs in an isolated WebAssembly instance.CI exercises the same test suite in a dedicated job with pinned Viceroy and cargo-nextest versions backed by job-local Rust caching. Renovate’s GitHub Actions versions preset keeps both tool pins current.