Struct TestEnvGuard 

pub struct TestEnvGuard { /* private fields */ }

Implementations

impl TestEnvGuard

pub fn set(key: &'static str, value: &str) -> TestEnvGuard

Set key to value, restoring the prior state on drop.

Blocks while another thread holds a live guard for the same variable; panics if the same thread nests a second guard for it.

pub fn remove(key: &'static str) -> TestEnvGuard

Remove key from the environment, restoring the prior state on drop: re-set to its previous value if it had one, otherwise left absent.

Blocking/panic behavior matches TestEnvGuard::set.

Trait Implementations

impl Drop for TestEnvGuard

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.