qubit-function 0.18.2

Functional programming traits and Box/Rc/Arc adapters for Rust, inspired by Java functional interfaces
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// =============================================================================
//    Copyright (c) 2025 - 2026 Haixing Hu.
//
//    SPDX-License-Identifier: Apache-2.0
//
//    Licensed under the Apache License, Version 2.0.
// =============================================================================

//! Tests for Consumer types

#[cfg(test)]
mod box_conditional_consumer_tests {
    use std::sync::Arc;
    use std::sync::Mutex;

    use qubit_function::BoxConsumer;
    use qubit_function::Consumer;

    #[test]
    fn test_box_conditional_and_then() {
        let log = Arc::new(Mutex::new(Vec::new()));
        let l1 = log.clone();
        let l2 = log.clone();

        let consumer = BoxConsumer::new(move |x: &i32| {
            l1.lock().expect("mutex should not be poisoned").push(*x);
        });

        let conditional = consumer.when(|x: &i32| *x > 0);
        let chained = conditional.and_then(move |x: &i32| {
            l2.lock().expect("mutex should not be poisoned").push(*x * 2);
        });

        chained.accept(&5);
        assert_eq!(*log.lock().expect("mutex should not be poisoned"), vec![5, 10]);

        chained.accept(&-5);
        assert_eq!(*log.lock().expect("mutex should not be poisoned"), vec![5, 10, -10]);
    }

    #[test]
    fn test_box_conditional_or_else() {
        let log = Arc::new(Mutex::new(Vec::new()));
        let l1 = log.clone();
        let l2 = log.clone();

        let consumer = BoxConsumer::new(move |x: &i32| {
            l1.lock().expect("mutex should not be poisoned").push(*x);
        });

        let conditional = consumer.when(|x: &i32| *x > 0).or_else(move |x: &i32| {
            l2.lock().expect("mutex should not be poisoned").push(*x * 10);
        });

        conditional.accept(&5);
        assert_eq!(*log.lock().expect("mutex should not be poisoned"), vec![5]);

        conditional.accept(&-5);
        assert_eq!(*log.lock().expect("mutex should not be poisoned"), vec![5, -50]);
    }

    #[test]
    fn test_box_conditional_accept() {
        let log = Arc::new(Mutex::new(Vec::new()));
        let l = log.clone();

        let consumer = BoxConsumer::new(move |x: &i32| {
            l.lock().expect("mutex should not be poisoned").push(*x);
        });

        let conditional = consumer.when(|x: &i32| *x > 0);

        conditional.accept(&5);
        assert_eq!(*log.lock().expect("mutex should not be poisoned"), vec![5]);

        conditional.accept(&-5);
        assert_eq!(*log.lock().expect("mutex should not be poisoned"), vec![5]);
    }
}