Struct CargoTestWorkers 

pub struct CargoTestWorkers { /* private fields */ }

The Rust Workers a cargo test suite starts itself, with wrangler dev.

The crate is instrumented with the rest of the workspace, and wrangler dev builds it in the copy as it builds it anywhere. What it ran is read by a wrangler of Supercov’s, first on the test processes’ PATH: it starts a poller on an inspector port of its own and then becomes the real wrangler, so the test keeps the process and the signals it expects. The poller writes what it takes into the evidence directory of the test that started the Worker, and the run reads it there as that test’s own: exact, not credited by time.

Implementations

impl CargoTestWorkers

pub fn prepare(workspace: &Path, tools: &Path) -> Result<Option<Self>, String>

Point the copy’s Worker configurations at Supercov’s entry and put the stand-in in tools. None where the workspace has no Rust Worker, or where no wrangler is installed: a test that looks for one must find none, as it would without Supercov.

pub fn environment(&self) -> impl Iterator<Item = (&str, &OsStr)>

What each test process is started with.