}

        when:
        dep.setTargetConfiguration('foo')

        then:
        thrown(InvalidUserCodeException)
    }

    void "refuses attribute when targetConfiguration specified"() {
        given:
        def dep = createDependency("group", "name", "1.0")
        dep.setTargetConfiguration('foo')

        when:
        dep.attributes {

        this.transitive = transitive;
        return this;
    }

    @Override
    public String getTargetConfiguration() {
        return configuration;
    }

    @Override
    public void setTargetConfiguration(@Nullable String configuration) {
        validateMutation(this.configuration, configuration);
        validateNotVariantAware();
        if (!artifacts.isEmpty()) {