Struct TestRng 

pub struct TestRng(/* private fields */);

A deterministic RNG for testing.

Like FuzzRng, this is a named type so tests and helpers can refer to it in signatures. The underlying generator is private, so consumers can only interact with it through the RNG traits. Construct it with test_rng or TestRng::new.

Implementations

impl TestRng

pub fn new(seed: u64) -> Self

Returns a deterministic RNG seeded with the provided value.

Use this when you need multiple independent RNG streams in the same test, or when a helper function needs its own RNG that won’t collide with the caller’s.

Trait Implementations

impl Debug for TestRng

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl TryCryptoRng for TestRng

Available on neither commonware_stability_BETA nor commonware_stability_DELTA nor commonware_stability_EPSILON nor commonware_stability_GAMMA nor commonware_stability_RESERVED.

impl TryRng for TestRng

Available on neither commonware_stability_BETA nor commonware_stability_DELTA nor commonware_stability_EPSILON nor commonware_stability_GAMMA nor commonware_stability_RESERVED.

type Error = Infallible

The type returned in the event of a RNG error.

fn try_next_u32(&mut self) -> Result<u32, Self::Error>

Return the next random u32.

fn try_next_u64(&mut self) -> Result<u64, Self::Error>

Return the next random u64.

fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), Self::Error>

Fill dst entirely with random data.