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// =============================================================================
// Copyright (c) 2025 - 2026 Haixing Hu.
//
// SPDX-License-Identifier: Apache-2.0
//
// Licensed under the Apache License, Version 2.0.
// =============================================================================
use qubit_function::{
ArcBiTransformer,
BiTransformer,
BoxBiTransformer,
RcBiTransformer,
};
use std::thread;
// ============================================================================
// BoxBiTransformer Tests - Immutable, single ownership
// ============================================================================
#[cfg(test)]
mod trait_usage_tests {
use super::{
BiTransformer,
BoxBiTransformer,
};
#[test]
fn test_bi_transformer_trait() {
fn apply_bi_transformer<F: BiTransformer<i32, i32, i32>>(
f: &F,
x: i32,
y: i32,
) -> i32 {
f.apply(x, y)
}
let add = BoxBiTransformer::new(|x: i32, y: i32| x + y);
assert_eq!(apply_bi_transformer(&add, 20, 22), 42);
}
#[test]
fn test_closure_as_bi_transformer() {
fn apply_bi_transformer<F: BiTransformer<i32, i32, i32>>(
f: &F,
x: i32,
y: i32,
) -> i32 {
f.apply(x, y)
}
let add = |x: i32, y: i32| x + y;
assert_eq!(apply_bi_transformer(&add, 20, 22), 42);
}
#[test]
fn test_with_different_types() {
fn apply_bi_transformer<T, U, R, F: BiTransformer<T, U, R>>(
f: &F,
x: T,
y: U,
) -> R {
f.apply(x, y)
}
let format = BoxBiTransformer::new(|name: String, age: i32| {
format!("{} is {}", name, age)
});
assert_eq!(
apply_bi_transformer(&format, "Alice".to_string(), 30),
"Alice is 30"
);
}
}
// ============================================================================
// Edge Cases Tests
// ============================================================================