Struct MockPredicateEnv 

pub struct MockPredicateEnv {
    pub platform: Platform,
    pub env: BTreeMap<String, String>,
    pub commands: BTreeSet<String>,
    pub files: BTreeSet<PathBuf>,
    pub resolver: Resolver,
}

Test double for PredicateEnv.

Build an instance, populate the public fields, and pass a reference to eval. All lookups are pure in-memory — the host filesystem, PATH, and environment are never consulted.

Fields

platform: Platform

Platform reported to platform: predicates.

env: BTreeMap<String, String>

Env vars available to env: predicates.

commands: BTreeSet<String>

Commands that are considered to exist for command_exists: predicates.

files: BTreeSet<PathBuf>

Paths that are considered to exist for file_exists: predicates.

resolver: Resolver

Resolver used to expand ${VAR} tokens in file_exists: paths.

Implementations

impl MockPredicateEnv

pub fn new(platform: Platform) -> Self

Create a blank mock on the given platform.

Trait Implementations

impl PredicateEnv for MockPredicateEnv

fn platform(&self) -> Platform

The platform to match platform:linux / platform:macos / platform:windows against.

fn env(&self, var: &str) -> Option<String>

Look up an environment variable. Returns None when the variable is not set (as opposed to set-but-empty, which returns Some("")).

fn command_exists(&self, name: &str) -> bool

Returns true when name is found on PATH.

fn file_exists(&self, path: &Path) -> bool

Returns true when path exists on the filesystem.

fn resolver(&self) -> &Resolver

The Resolver used to expand ${VAR} tokens in file_exists: paths.