}

    def "variant file metadata rules are evaluated once and lazily for #metadataType metadata"() {
        given:
        def rule = Mock(Action)

        when:
        metadata.getVariantMetadataRules().addVariantFilesAction(new VariantMetadataRules.VariantAction<MutableVariantFilesMetadata>(null, rule))
        def variant = selectTargetConfigurationMetadata(metadata)

        then:
        0 * rule.execute(_)
        when:

    }

    @Override
    public void withFiles(Action<? super MutableVariantFilesMetadata> action) {
        metadata.getVariantMetadataRules().addVariantFilesAction(new VariantMetadataRules.VariantAction<>(variantName, action));
    }

    @Override
    public VariantMetadata attributes(Action<? super AttributeContainer> action) {

        if (capabilitiesRules == null) {
            capabilitiesRules = new ArrayList<>(1);
        }
        capabilitiesRules.add(action);
    }

    public void addVariantFilesAction(VariantAction<? super MutableVariantFilesMetadata> action) {
        if (variantFilesRules == null) {
            variantFilesRules = new VariantFilesRules();
        }
        variantFilesRules.addFilesAction(action);