dvd-thing/crates/adapters/assets/tests/loading.rs

mod common;

use application::LogoSourcePort;
use assets::{FileLogoSource, Platform};
use common::{LOGO_BYTES, env_of, scratch, write_logo};

#[test]
fn reads_an_explicit_path() {
    let logo = write_logo(&scratch("explicit"));

    let source = FileLogoSource::new(Some(logo), None).unwrap();

    assert_eq!(source.load().unwrap(), Some(LOGO_BYTES));
}

#[test]
fn a_missing_explicit_path_is_an_error() {
    let missing = scratch("explicit-missing").join("absent.png");

    let error = FileLogoSource::new(Some(missing), None).unwrap_err();

    assert!(error.to_string().contains("DVD_LOGO"));
}

#[test]
fn an_explicit_path_wins_over_the_configured_one() {
    let directory = scratch("explicit-wins");
    let explicit = directory.join("chosen.png");
    std::fs::write(&explicit, b"chosen").unwrap();

    let source = FileLogoSource::new(Some(explicit), Some(write_logo(&directory))).unwrap();

    assert_eq!(source.load().unwrap(), Some(b"chosen".as_slice()));
}

#[test]
fn reads_the_configured_path() {
    let logo = write_logo(&scratch("configured"));

    let source = FileLogoSource::new(None, Some(logo)).unwrap();

    assert_eq!(source.load().unwrap(), Some(LOGO_BYTES));
}

#[test]
fn a_missing_configured_path_is_not_an_error() {
    let missing = scratch("configured-missing").join("absent.png");

    let source = FileLogoSource::new(None, Some(missing)).unwrap();

    assert_eq!(source.load().unwrap(), None);
}

#[test]
fn no_paths_at_all_yields_nothing() {
    let source = FileLogoSource::new(None, None).unwrap();

    assert_eq!(source.load().unwrap(), None);
}

#[test]
fn an_unreadable_configured_path_is_an_error() {
    let directory = scratch("configured-unreadable");
    std::fs::create_dir_all(directory.join("logo.png")).unwrap();

    assert!(FileLogoSource::new(None, Some(directory.join("logo.png"))).is_err());
}

#[test]
fn an_empty_dvd_logo_variable_is_treated_as_unset() {
    let env = env_of(&[("DVD_LOGO", ""), ("HOME", "")]);

    let source = FileLogoSource::from_environment(Platform::Xdg, &env).unwrap();

    assert_eq!(source.load().unwrap(), None);
}

#[test]
fn a_set_dvd_logo_variable_still_wins() {
    let logo = write_logo(&scratch("env-explicit"));
    let env = env_of(&[("DVD_LOGO", logo.to_str().unwrap()), ("HOME", "")]);

    let source = FileLogoSource::from_environment(Platform::Xdg, &env).unwrap();

    assert_eq!(source.load().unwrap(), Some(LOGO_BYTES));
}