import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.*;

public class DefaultChecksumAlgorithmServiceTest {
    private static Map<String, ChecksumAlgorithmFactory> getChecksumAlgorithmFactories() {
        HashMap<String, ChecksumAlgorithmFactory> result = new HashMap<>();
        result.put(Sha512ChecksumAlgorithmFactory.NAME, new Sha512ChecksumAlgorithmFactory());

    }

    @Override
    public Collection<String> getChecksumAlgorithmNames() {
        return checksumAlgorithmFactorySelector.getChecksumAlgorithmFactories().stream()
                .map(ChecksumAlgorithmFactory::getName)
                .collect(Collectors.toList());
    }

    @Override
    public ChecksumAlgorithm select(String algorithmName) {

    }

    private Map<String, ChecksumAlgorithmFactory> checksumAlgorithmFactories;

    public final Map<String, ChecksumAlgorithmFactory> getChecksumAlgorithmFactories() {
        checkClosed();
        if (checksumAlgorithmFactories == null) {
            checksumAlgorithmFactories = createChecksumAlgorithmFactories();
        }
        return checksumAlgorithmFactories;

    }

    private Map<String, ChecksumAlgorithmFactory> checksumAlgorithmFactories;

    public final Map<String, ChecksumAlgorithmFactory> getChecksumAlgorithmFactories() {
        checkClosed();
        if (checksumAlgorithmFactories == null) {
            checksumAlgorithmFactories = createChecksumAlgorithmFactories();
        }
        return checksumAlgorithmFactories;