#[test]
fn test_process_payment_insufficient_funds_returns_error()

#[tokio::test]
async fn test_withdraw_valid_amount_decreases_balance()

#[test]
fn test_account_withdraw_decreases_balance() {
    // Arrange
    let mut account = Account::new(100);

    // Act
    let result = account.withdraw(30);

    // Assert
    assert!(result.is_ok());
    assert_eq!(account.balance(), 70);
}

// Async tests
#[tokio::test]
async fn test_async_operation() { /* ... */ }

// Result-based tests
#[test]
fn test_operation() -> anyhow::Result<()> { /* ... */ }

// Test builders
let episode = TestEpisodeBuilder::new()
    .with_task("Test task")
    .completed(true)
    .build();

// RAII cleanup
struct TestDb(TempDir);
impl Drop for TestDb { fn drop(&mut self) { /* auto cleanup */ } }