use assert_cmd::Command;
use predicates::prelude::*;

#[test]
fn test_compressing_and_decompressing() -> Result<(), Box<dyn std::error::Error>> {
    let content = b"Sasha Grey";

    let compress_result = Command::cargo_bin(env!("CARGO_PKG_NAME"))?
        .write_stdin(content.to_owned())
        .assert()
        .success();
    let compressed_content = &compress_result.get_output().stdout;
    assert_ne!(compressed_content, content);

    let decompress_result = Command::cargo_bin(env!("CARGO_PKG_NAME"))?
        .arg("--decompress")
        .write_stdin(compressed_content.to_owned())
        .assert()
        .success();
    assert_eq!(decompress_result.get_output().stdout, content);

    Ok(())
}

#[test]
fn test_file_doesnt_exist() -> Result<(), Box<dyn std::error::Error>> {
    Command::cargo_bin(env!("CARGO_PKG_NAME"))?
        .arg("test/file/doesnt/exist")
        .assert()
        .failure()
        .stderr(predicate::str::contains("File not found"));

    Ok(())
}

#[test]
fn test_invalid_level_range() -> Result<(), Box<dyn std::error::Error>> {
    Command::cargo_bin(env!("CARGO_PKG_NAME"))?
        .arg("--level")
        .arg("10")
        .assert()
        .failure()
        .stderr(predicate::str::contains("Level must be in the 0-9 range"));

    Ok(())
}

#[test]
fn test_invalid_level() -> Result<(), Box<dyn std::error::Error>> {
    Command::cargo_bin(env!("CARGO_PKG_NAME"))?
        .arg("--level")
        .arg("invalid")
        .assert()
        .failure()
        .stderr(predicate::str::contains("Invalid number"));

    Ok(())
}