1 * apiElements.getOutgoing() >> outgoing
        1 * outgoing.getVariants() >> variants
        1 * variants.maybeCreate('classes') >> variant
        1 * variant.getAttributes() >> attrs
        1 * variant.artifactsProvider(_) >> {
            def artifacts = it[0].create()
            assert artifacts.size() == 1
            PublishArtifact artifact = artifacts[0]
            assert artifact.name == 'toto'
        }