}

    def "has union of producer task from providers unless producer task attached"() {
        given:
        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:

        given:
        Task broken = task("broken", type: Async, failure: new RuntimeException())
        Task finalizerDep = task("finalizerDep", type: Async, dependsOn: [broken])
        Task finalizer = task("finalizer", type: Async, dependsOn: [finalizerDep])
        Task finalized = task("finalized", type: Async, finalizedBy: [finalizer])
        Task task = task("task", type: Async, dependsOn: [finalized])

    }

    def "has union of producer task from providers unless producer task attached"() {
        given:
        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:

writing-tasks-7.png...

writing-tasks-6.png...

Method <org.gradle.api.tasks.GradleBuild.getBuildName()> does not have raw return type assignable to org.gradle.api.provider.Property in (GradleBuild.java:0)
Method <org.gradle.api.tasks.GradleBuild.getDir()> does not have raw return type assignable to org.gradle.api.provider.Property in (GradleBuild.java:0)

writing-tasks-2.png...

writing-tasks-4.png...

task-execution-cacheable.png...

    def "build dependencies are calculated from the artifacts visited during graph resolution"() {
        def configuration = conf()
        def targetTask = Mock(Task)
        def task1 = Mock(Task)
        def task2 = Mock(Task)
        def requiredTasks = [task1, task2] as Set
        def artifactTaskDependencies = Mock(TaskDependency)
        def visitedArtifactSet = Mock(VisitedArtifactSet)