then:
        publication.defaultArtifactProvider.get() == set(jar)

        when:
        publication.addCandidate(war)

        then:
        publication.defaultArtifactProvider.get() == set(war)

        when:
        publication.addCandidate(jar)

        then:
        publication.defaultArtifactProvider.get() == set(war)
    }

    def "prefers ear over jar artifact"() {

        }
        defaultArtifactProvider.addArtifact(artifact);
    }

    DefaultArtifactProvider getDefaultArtifactProvider() {
        return defaultArtifactProvider;
    }

    private static class DefaultArtifactProvider extends AbstractMinimalProvider<Set<PublishArtifact>> implements CollectionProviderInternal<PublishArtifact, Set<PublishArtifact>>, ChangingValue<Set<PublishArtifact>> {

Class <org.gradle.api.internal.plugins.DefaultArtifactPublicationSet$DefaultArtifactProvider> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (DefaultArtifactPublicationSet.java:0)