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()

        @Override
        public void collectInto(ImmutableCollection.Builder<T> builder) {
            if (!realized) {
                realize();
            }
            builder.addAll(cache);
        }

        List<T> getValues() {
            if (!realized) {
                realize();
            }
            return cache;
        }

        public boolean remove(T value) {

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

        def library = realize("library")

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

    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();

    /**

        then:
        !foo.promise.canBeViewedAs(ModelType.of(String))
        foo.promise.canBeViewedAs(ModelType.of(List))

        registry.realize(fooReference.path, fooReference.type).is(fooList)
        registry.realize(barReference.path, barReference.type).is(barList)
    }

        project.apply plugin: 'custom-rule-source'

        then:
        project.modelRegistry.realize("foo", String) == "bar"
    }

    def "can apply a rule source by type"() {
        when:
        def project = buildProject()
        project.apply type: CustomRuleSource

        then:
        project.modelRegistry.realize("foo", String) == "bar"
    }

    id 'java'
}

def version = objects.property(String)

configurations.testImplementation.dependencies.addLater(version.map { project.dependencies.create("com.example:artifact:\${it}") })

tasks.all {} // force realize all tasks

version.set('5.6')

assert configurations.testRuntimeClasspath.allDependencies.size() == 1 
        """
        expect:
        succeeds("help")
    }

        collection.visitDependencies(Stub(TaskDependencyResolveContext))

        then:
        registry.state("tasks.redundant") == ModelNode.State.Discovered
    }

    def "realize is idempotent"() {
        given:
        ModelRegistryHelper registry = new ModelRegistryHelper()
        ModelPath path = ModelPath.path("tasks")

        registry.registerInstance("tasks", "foo tasks")

class ProjectVariantResolutionIntegrationTest extends AbstractIntegrationSpec implements VariantAwareDependencyResolutionTestFixture, TasksWithInputsAndOutputs {
    def "does not realize tasks that produce outgoing artifacts that are not required"() {
        createDirs("a", "b")
        settingsFile << """
            include 'a', 'b'
        """
        setupBuildWithColorVariants()

    @Override
    public Collection<Task> listProjectTasks(Project project) {
        ProjectInternal projectInternal = (ProjectInternal) project;
        TaskContainerInternal tasks = projectInternal.getTasks();
        tasks.realize();
        return tasks;
    }