rust/tests/run-pass/env.rs

//ignore-windows: TODO env var emulation stubbed out on Windows

use std::env;

fn main() {
    assert_eq!(env::var("MIRI_TEST"), Err(env::VarError::NotPresent));
    env::set_var("MIRI_TEST", "the answer");
    assert_eq!(env::var("MIRI_TEST"), Ok("the answer".to_owned()));
    // Test that miri environment is isolated when communication is disabled.
    assert!(env::var("MIRI_ENV_VAR_TEST").is_err());
    // Test that the new variable is in the `std::env::Vars` iterator
    assert!(env::vars().any(|(name, value)| name == "MIRI_TEST"))
}