property.type == property.shallowCopy().type
    }

    def "shallow copy inherits dependencies of the original"() {
        given:
        def task = Mock(Task)
        def provider = supplierWithProducer(task)
        def property = propertyWithNoValue()
        property.set(provider)

        expect:
        assertHasProducer(property.shallowCopy(), task)
    }

        def task1 = Stub(Task)
        def task2 = Stub(Task)
        def task3 = Stub(Task)
        def producer = Stub(Task)
        property.set(supplierWithProducer(task1))
        property.addAll(supplierWithProducer(task2))
        property.add(supplierWithProducer(task3))

        expect:
        assertHasProducer(property, task1, task2, task3)

        property.attachProducer(owner(producer))

        def task1 = Stub(Task)
        def task2 = Stub(Task)
        def task3 = Stub(Task)
        def producer = Stub(Task)
        property.set(supplierWithProducer(task1))
        property.putAll(supplierWithProducer(task2))
        property.put('a', supplierWithProducer(task3, '1'))

        expect:
        assertHasProducer(property, task1, task2, task3)

        property.attachProducer(owner(producer))

        def task = Mock(Task)
        def upstream = Mock(Task)
        def property = propertyWithNoValue()
        property.set(supplierWithProducer(upstream))

        expect:
        assertHasProducer(property, upstream)

        when:
        property.attachProducer(owner(task))

        then: