//! Tests for the SIMD backend abstraction.
//!
//! - [`contract`] checks each backend's primitives (eq, gt, shift, ...) against
//! the scalar impl
//! - [`parity`] checks that every backend produces identical scores and indices
//! to the scalar impl
//! - [`generator`] randomized-input generator used by `parity` and
//! `/tests/api_properties.rs`