/**
 * Any object that can produce an accompanying stop task, meant to tear down
 * a previously instantiated service.
 */
public interface Fixture {

    /** A task which will stop this fixture. This should be used as a finalizedBy for any tasks that use the fixture. */
    Object getStopTask();

import org.elasticsearch.gradle.internal.test.Fixture
import org.gradle.api.GradleException
import org.gradle.api.tasks.Internal
import org.gradle.api.tasks.TaskProvider

/**
 * A fixture for integration tests which runs in a separate process launched by Ant.
 */
class AntFixture extends AntTask implements Fixture {

    /** The path to the executable that starts the fixture. */
    @Internal
    String executable

    @Internal
    AntFixture fixture

    @Internal
    FileSystemOperations fileSystemOperations

    @Inject
    AntFixtureStop(FileSystemOperations fileSystemOperations) {
        super(fileSystemOperations)
        this.fileSystemOperations = fileSystemOperations
    }

    void setFixture(AntFixture fixture) {
        assert this.fixture == null
        this.fixture = fixture;

  ':plugins:repository-hdfs:hadoop-common',
  ':plugins:repository-s3',
  ':plugins:store-smb',
  ':plugins:transport-nio',
  ':qa:die-with-dignity',
  ':rest-api-spec',
  ':test:fixtures:geoip-fixture',
  ':test:fixtures:krb5kdc-fixture',
  ':test:fixtures:old-elasticsearch',
  ':test:framework',
  ':test:logger-usage',
  ':x-pack:license-tools',
  ':x-pack:plugin',
  ':x-pack:plugin:async-search',

        }
        if (fixtureProject.file(TestFixturesPlugin.DOCKER_COMPOSE_YML).exists() == false) {
            throw new IllegalArgumentException(
                "Project " + path + " is not a valid test fixture: missing " + TestFixturesPlugin.DOCKER_COMPOSE_YML
            );
        }
        fixtures.add(fixtureProject);
        // Check for exclusive access

    assertEquals("Three Objects should be delivered.", 3, objectEvents.size());
    assertEquals("String fixture must be first object delivered.", EVENT, objectEvents.get(0));
    assertEquals("Object fixture must be second object delivered.", objEvent, objectEvents.get(1));
    assertEquals(
        "Comparable fixture must be thirdobject delivered.", compEvent, objectEvents.get(2));

    // Check the Catcher<Comparable<?>>...

    assertEquals("Three Objects should be delivered.", 3, objectEvents.size());
    assertEquals("String fixture must be first object delivered.", EVENT, objectEvents.get(0));
    assertEquals("Object fixture must be second object delivered.", objEvent, objectEvents.get(1));
    assertEquals(
        "Comparable fixture must be thirdobject delivered.", compEvent, objectEvents.get(2));

    // Check the Catcher<Comparable<?>>...

            return;
        }
        // fail on any conflicting dependency versions
        project.getConfigurations().all(configuration -> {
            if (configuration.getName().endsWith("Fixture")) {
                // just a self contained test-fixture configuration, likely transitive and hellacious
                return;
            }
            configuration.resolutionStrategy(ResolutionStrategy::failOnVersionConflict);
        });

#### Using test fixtures

Sometimes we want to share test fixtures to setup the code under test across multiple projects. There are basically two ways doing so.

Ideally we would use the build-in [java-test-fixtures](https://docs.gradle.org/current/userguide/java_testing.html#sec:java_test_fixtures) gradle plugin.
This plugin relies on having a separate sourceSet for the test fixtures code.

                    """
                )
            },
            block = block
        )

    /**
     * Runs the binary compatibility check against two source trees.
     *
     * The fixture build supports both Java and Kotlin sources.
     *
     * @param v1 sources producer for V1, receiver is the `src/main` directory
     * @param v2 sources producer for V2, receiver is the `src/main` directory