depyler-core 3.23.0

// Generated by: DEPYLER stdlib validation Phase 1
// Module: functools - Python functools module validation
// Status: RED phase - Tests written first, implementation pending

use depyler_core::transpile_python_to_rust;

// DEPYLER-STDLIB-FUNCTOOLS-001: Reduce
#[test]
fn test_reduce() {
    let python = r#"
import functools

def sum_all(numbers: list) -> int:
    return functools.reduce(lambda a, b: a + b, numbers)
"#;

    let result = transpile_python_to_rust(python).expect("Transpilation failed");

    // Should reduce/fold over iterable
    assert!(result.contains("fold"));
}

// DEPYLER-STDLIB-FUNCTOOLS-002: Partial application
#[test]
#[ignore = "DEPYLER-STDLIB-FUNCTOOLS: Not implemented yet - RED phase"]
fn test_partial() {
    let python = r#"
import functools

def create_doubler() -> callable:
    def multiply(a: int, b: int) -> int:
        return a * b
    return functools.partial(multiply, 2)
"#;

    let result = transpile_python_to_rust(python).expect("Transpilation failed");

    // Should create partial function
    assert!(result.contains("partial") || result.contains("move") || result.contains("closure"));
}

// DEPYLER-STDLIB-FUNCTOOLS-003: LRU cache
#[test]
#[ignore = "DEPYLER-STDLIB-FUNCTOOLS: Not implemented yet - RED phase"]
fn test_lru_cache() {
    let python = r#"
import functools

@functools.lru_cache(maxsize=128)
def fibonacci(n: int) -> int:
    if n < 2:
        return n
    return fibonacci(n-1) + fibonacci(n-2)
"#;

    let result = transpile_python_to_rust(python).expect("Transpilation failed");

    // Should add memoization/caching
    assert!(result.contains("cache") || result.contains("memo") || result.contains("HashMap"));
}

// Total: 3 comprehensive tests for functools module
// Coverage: reduce, partial, lru_cache
// Higher-order functions and decorators