Method load_runtime_test

crates/test/src/lib.rs:356–434

Loads a test from `dir` using the `wit` file in the directory specified. Returns a list of components that were found within this directory.

(
        &self,
        wit: &Path,
        dir: &Path,
    )

    ///
    /// Returns a list of components that were found within this directory.
    fn load_runtime_test(
        &self,
        wit: &Path,
        dir: &Path,
    ) -> Result<(config::WitConfig, Vec<Component>)> {
        let mut resolve = wit_parser::Resolve::default();

        let wit_path = if dir.join("deps").exists() { dir } else { wit };
        let (pkg, _files) = resolve.push_path(wit_path).context(format!(
            "failed to load `test.wit` in test directory: {:?}",
            &wit
        ))?;
        let resolve = Arc::new(resolve);

        let wit_contents = std::fs::read_to_string(wit)?;
        let wit_config: config::WitConfig = config::parse_test_config(&wit_contents, "//@")
            .context("failed to parse WIT test config")?;

        let mut worlds = Vec::new();

        let mut push_world = |kind: Kind, name: &str| -> Result<()> {
            let world = resolve.select_world(&[pkg], Some(name)).with_context(|| {
                format!("failed to find expected `{name}` world to generate bindings")
            })?;
            worlds.push((world, kind));
            Ok(())
        };
        push_world(Kind::Runner, wit_config.runner_world())?;
        for world in wit_config.dependency_worlds() {
            push_world(Kind::Test, &world)?;
        }

        let mut components = Vec::new();
        let mut any_runner = false;
        let mut any_test = false;

        for entry in dir.read_dir().context("failed to read test directory")? {
            let entry = entry.context("failed to read test directory entry")?;
            let path = entry.path();

            let Some(name) = path.file_name().and_then(|s| s.to_str()) else {
                continue;
            };
            if name == "test.wit" {
                continue;
            }

            let Some((world, kind)) = worlds
                .iter()
                .find(|(world, _kind)| name.starts_with(&resolve.worlds[*world].name))
            else {
                log::debug!("skipping file {name:?}");
                continue;
            };
            match kind {
                Kind::Runner => any_runner = true,
                Kind::Test => any_test = true,
            }