when:
        def interfaceWithPrimitiveProperty = loader.parseClass """
            @org.gradle.model.Managed
            interface PrimitiveProperty {
                $primitiveType.name getPrimitiveProperty()

                void setPrimitiveProperty($primitiveType.name value)
            }
        """

        def data = [:]
        def state = Mock(GeneratedViewState)

            import org.gradle.model.Managed

            @Managed
            interface PrimitiveProperty {
                $primitiveType.name getPrimitiveProperty()

                void setPrimitiveProperty($primitiveType.name value)
            }
        """

        def properties = extract(interfaceWithPrimitiveProperty).properties

        then:

            import org.gradle.model.Managed

            @Managed
            interface PrimitiveProperty {
                $firstType.name getPrimitiveProperty()

                void setPrimitiveProperty($secondType.name value)
            }
        """
        when: extract interfaceWithPrimitiveProperty
        then: def ex = thrown InvalidManagedTypeException