wagon.addExpectedContent(repos.get(0).getLayout().pathOf(artifact), "expected");
        wagon.addExpectedContent(
                repos.get(0).getLayout().pathOf(artifact) + ".md5", "cd26d9e10ce691cc69aa2b90dcebbdac");
        wagon.addExpectedContent(repos.get(1).getLayout().pathOf(artifact), "expected");
        wagon.addExpectedContent(

import org.apache.maven.wagon.resource.Resource;

@Named("string")
@Singleton
public class StringWagon extends StreamWagon {
    private Map<String, String> expectedContent = new HashMap<>();

    public void addExpectedContent(String resourceName, String expectedContent) {
        this.expectedContent.put(resourceName, expectedContent);
    }

    public String[] getSupportedProtocols() {
        return new String[] {"string"};
    }