property.set((Map) null)
    }

    @Override
    protected void nullConvention(Object property) {
        property.convention((Map) null)
    }

    @Override
    ManagedFactory managedFactory() {
        return new ManagedFactories.MapPropertyManagedFactory(TestUtil.propertyFactory())
    }

    def property = property()

    def "has empty map as value by default"() {
        expect:

        def state = property.unpackState()
        def copy = managedFactory().fromState(property.publicType(), state)
        !copy.is(property)
        !copy.present
        copy.getOrNull() == null

        property.set(someValue())
        copy.getOrNull() == null

        def state2 = property.unpackState()
        def copy2 = managedFactory().fromState(property.publicType(), state2)
        !copy2.is(property)