Struct DeterministicRuntime 

pub struct DeterministicRuntime { /* private fields */ }

Deterministic runtime providing seeded randomness and a virtual clock.

All state is fully determined by the initial seed. The virtual clock starts at 0 and advances by a fixed increment on each read, so even the “current time” is reproducible.

Implementations

impl DeterministicRuntime

pub fn new(seed: u64) -> Self

Create a new deterministic runtime with the given seed.

The virtual clock starts at 0 and advances by 1 ms per call to current_time_ms().

pub fn with_clock_increment(seed: u64, clock_increment_ns: u64) -> Self

Create with a custom clock increment (in nanoseconds).

pub fn seed(&self) -> u64

The seed used to initialize this runtime.

pub fn next_random_f64(&mut self) -> f64

Generate the next random f64 in [0.0, 1.0).

pub fn next_random_range(&mut self, min: f64, max: f64) -> f64

Generate the next random f64 in [min, max).

pub fn current_time_ms(&mut self) -> f64

Return the current virtual time in milliseconds, then advance the clock by the configured increment.

This mirrors the semantics of time.millis() — each call returns a monotonically increasing value.

pub fn advance_clock(&mut self, ns: u64)

Manually advance the virtual clock by ns nanoseconds.

pub fn reset(&mut self)

Reset the runtime to its initial state (same seed).