instant.allStarted
        }

        then:
        6 * workerThreadRegistry.workerThread >> true
        6 * executionQueue.submit(_)

        where:
        isolationMode << ["noIsolation", "classLoaderIsolation", "processIsolation"]
    }

    def "can wait on results to complete"() {
        when:
        workerExecutor.await()

        then:

        IncubationLogger.incubatingFeatureUsed("Maven to Gradle conversion");
        try {
            Settings settings = settingsProvider.buildSettings();
            executor.classLoaderIsolation(config -> config.getClasspath().from(mavenClasspath))
                    .submit(Maven2GradleWorkAction.class, params -> {
                        params.getWorkingDir().set(initSettings.getTarget());

     */
    def "workers with classpath isolation cannot spawn more work with #nestedIsolationMode"() {
        buildFile << """
            ${getWorkActionWithNesting("classLoaderIsolation", nestedIsolationMode)}
            task runInWorker(type: NestingWorkerTask)
        """.stripIndent()

        expect:
        fails("runInWorker")

        and:

        and:
        executedAndNotSkipped(":runAgainInWorker")
        assertWorkerExecuted("runAgainInWorker")

        where:
        isolationMode << ["'classLoaderIsolation'", "'processIsolation'"]
    }

    def "produces a sensible error even if the action failure cannot be fully serialized in #isolationMode"() {
        fixture.withWorkActionClassInBuildSrc()

            return new DefaultWorkResult(true, null)
        }
    }

    def "executor executes a given runnable in-process"() {
        when:
        workerExecutor.classLoaderIsolation().submit(TestExecutable.class, Actions.doNothing())

        then:
        1 * workerThreadRegistry.workerThread >> true
        1 * executionQueue.submit(_) >> { args -> task = args[0] }

        when:

This will become an error in Gradle 6.0.

==== Method `WorkerExecutor.submit()` is deprecated

The `WorkerExecutor.submit()` method is now deprecated.
The new `noIsolation()`, `classLoaderIsolation()` and `processIsolation()` methods should now be used to submit work.
See <<worker_api.adoc#tasks_parallel_worker,the section on the Worker API>> for more information on using these methods.

==== WorkerExecutor API Cleanup

The deprecated `submit(Class, Action)` method of the `WorkerExecutor` interface has been removed.
Instead, obtain a `WorkQueue` via the `noIsolation()`, `classLoaderIsolation()`, and `processIsolation()`, methods and use the `submit(Class, Action)` method on the `WorkQueue` instead.

==== DependencySubstitution API Cleanup