remove(1)
        }

        then:
        def list = registry.realize(collectionPath, collectionType)
        list == checkable(['foo', 'baz'])
    }

    def "can add using index"() {
        when:
        mutate {
            add 'foo'
            add(0, 'bar')
        }

        then:
        def list = registry.realize(collectionPath, collectionType)
        list == ['bar', 'foo']

    }

        registry.registerWithInitializer("foo", NamedThingInterface, nodeInitializerRegistry)

        then:
        registry.realize("foo", NamedThingInterface).name == "foo"

        when:
        registry.registerWithInitializer("bar", NamedThingInterface, nodeInitializerRegistry)

        then:
        registry.realize("bar", NamedThingInterface).name == "bar"
    }


    @Managed
    static abstract class NonNamedThing {

        then:
        def set = registry.realize(collectionPath, collectionType)
        def e1 = set.find { it.name == '1' }
        def e2 = set.find { it.name == '1' }
        e1.is(e2)
    }

    def "can query set size"() {
        when:
        mutate {
            create { name = '1' }
            create { name = '2' }
        }

        then:
        !registry.realize(collectionPath, collectionType).isEmpty()

                void setUnmanagedReadWriteProperty($type type)
            }

        """

        then:
        realize(clazz)

        where:
        type << ['List<Date>', 'Set<Date>']

    }

    private void failWhenRealized(Class type, String expected) {
        try {
            realize(type)
            throw new AssertionError("node realisation of type ${type.name} should have failed with a cause of:\n$expected\n")

        given:
        register("foo", [])

        when:
        modelDsl.configure {
            foo {
                add 1
            }
        }

        then:
        registry.realize("foo", List) == [1]
    }

    @Managed
    interface Thing {
        void setName(String name)

        String getName()
    }

    @Managed
    interface Foo {
        ModelSet<Thing> getBar()

                println "finished"
                assert output.toString().readLines() == [":log", "output"]
                assert error.toString().readLines() == ["error"]
                assert before.toString().readLines() == [":log", "output", "error"]
                assert after.toString().readLines() == []
            }
        """

        expect:
        succeeds("log", "other")
    }

    def "cannot execute mutation method #mutationMethod.key from Provider.configure (realized)"() {
        buildFile << """
            realized.configure {
                ${mutationMethod.value}
            }
            toBeRealized.get()
        """

        expect:
        fails "help"

        when:
        dsl {
            apply plugin: NativeBinariesTestPlugin
            model {
                library(StaticLibraryBinarySpec)
            }
        }

        def library = realize("library")

        dsl {
            model {
                binary(NativeTestSuiteBinarySpec) {
                    testedBinary = library
                    tasks.create("run", RunTestExecutable) {}

            tasks.register("bar", Delete)
        """

        when:
        succeeds "help"

        then:
        // help task is realized and configured
        outputContains("configured :help")

        // are "built-in" tasks realized and configured?
        if (realizesBuiltInTasks) {
            outputContains("configured :tasks")
            outputContains("configured :projects")
        } else {

    DynamicObject getTasksAsDynamicObject();

    /**
     * Force the task graph to come into existence.
     */
    void realize();

    /**
     * Performs work to discover more tasks.
     *
     * This method differs from {@link #realize} in that it does not realize the whole subtree.
     */
    void discoverTasks();

    /**