Function package_metadata_iterator

alpm-package/tests/integration.rs:907–954

()

// Ensure that the metadata iterator short-circuits after finding all metadata files.
#[test]
fn package_metadata_iterator() -> TestResult {
    init_logger();

    let temp_dir = TempDir::new()?;
    let package = create_package(
        &temp_dir,
        &InputDirConfig {
            build_info: true,
            data_files: true,
            mtree: true,
            package_info: true,
            scriptlet: true,
        },
        CompressionSettings::Xz {
            compression_level: Default::default(),
        },
    )?;

    let mut reader: PackageReader = package.clone().try_into()?;
    let mut metadata_entries = reader.metadata_entries()?;

    assert!(matches!(
        metadata_entries.next(),
        Some(Ok(MetadataEntry::BuildInfo(_)))
    ));
    assert!(matches!(
        metadata_entries.next(),
        Some(Ok(MetadataEntry::Mtree(_)))
    ));
    assert!(matches!(
        metadata_entries.next(),
        Some(Ok(MetadataEntry::PackageInfo(_)))
    ));
    // Make sure that the iterator no longer returns any values.
    // This should not advance the iterator, as all metadata files have been found.
    assert!(metadata_entries.next().is_none());

    // Now test that the short-circuit of the iterator actually worked.
    // Get the underlying raw Entries iterator and make sure that this non-filtering iterator still
    // produces data files.
    let mut inner_iter = metadata_entries.into_inner().into_inner();
    assert!(
        inner_iter.next().is_some(),
        "Expected the non-filtering iterator to still return a value."
    );

    Ok(())
}

// Small helper function to assert that an entry is a metadata entry and then returns
// that entry.