Struct AbTestManager 

pub struct AbTestManager { /* private fields */ }

Manages multi-variant A/B experiments.

Implementations

impl AbTestManager

pub fn new() -> Self

Create an empty manager.

pub fn create_experiment(&mut self, experiment: Experiment)

Register a new experiment.

pub fn assign(&self, experiment_id: &str, user_id: &str) -> Option<Assignment>

Deterministically assign a user to a variant using weighted FNV hash.

Returns None if the experiment doesn’t exist or is not Running.

pub fn record_outcome( &mut self, assignment: &Assignment, success: bool, cost: f64, latency_ms: u64, )

Record an outcome for a previously made assignment.

pub fn results(&self, experiment_id: &str) -> Vec<ExperimentResult>

Return aggregated results for all variants in an experiment.

pub fn statistical_significance( r_a: &ExperimentResult, r_b: &ExperimentResult, ) -> f64

Two-proportion z-test significance.

Returns p-value approximation using erfc: p = erfc(|z| / sqrt(2)).

pub fn winner(&self, experiment_id: &str) -> Option<String>

Return the variant ID with the highest conversion rate if statistically significant (z > 1.96 for p < 0.05), or None.

pub fn auto_complete(&mut self, experiment_id: &str, now: u64) -> bool

Check end condition and mark experiment completed if met. Returns true if completed.

Trait Implementations

impl Default for AbTestManager

fn default() -> Self

Returns the “default value” for a type.