dir-odt-to-pdf/tests/test_init_logging_append_mode.rs

use dir_odt_to_pdf::error::{LogError, ProcessError, Result};
use dir_odt_to_pdf::logging::{LogConfig, init_logging};
use log::{LevelFilter, debug, info};
use std::fs;
mod common;

#[test]
fn test_init_logging_append_mode() -> Result<()> {
    // Create a temporary file for logging
    let (_temp_dir, log_path) = common::setup_test_log_file();
    debug!("Starting test_init_logging_append_mode test");

    // First initialization
    let config = LogConfig {
        log_file: Some(log_path.clone()),
        log_level: LevelFilter::Debug,
        append_log: false,
    };

    debug!("About to initialize logging for the first time...");
    init_logging(config)?;

    // Write first message
    info!("Testing append mode...");
    info!("first message");

    // Read first message
    let content = fs::read_to_string(&log_path).map_err(ProcessError::Io)?;
    println!("=== Initial Log Contents ===");
    println!("{}", content);
    println!("=======================");
    assert!(content.contains("first message"));

    // Try second initialization with append mode
    debug!("Attempting second initialization with append mode...");
    let config = LogConfig {
        log_file: Some(log_path.clone()),
        log_level: LevelFilter::Debug,
        append_log: true,
    };

    // Try to initialize again - this should fail
    match init_logging(config) {
        Err(ProcessError::Log(LogError::AlreadyInitialized)) => {
            debug!("Got expected AlreadyInitialized error");
            info!("second message");

            // Check final contents
            let content = fs::read_to_string(&log_path).map_err(ProcessError::Io)?;
            println!("\n=== Final Log Contents ===");
            println!("{}", content);
            println!("=======================");

            assert!(content.contains("first message"));
            assert!(content.contains("second message"));
            debug!("Test completed successfully");
            Ok(())
        }
        Ok(_) => {
            info!("Unexpected success on second initialization");
            panic!("Expected AlreadyInitialized error")
        }
        Err(e) => {
            info!("Unexpected error: {:?}", e);
            Err(e)
        }
    }
}