single node.
* **`ESIntegTestCase`**: An integration test case that creates a cluster that
  might have multiple nodes.
* **`ESRestTestCase`**: An integration tests that interacts with an external
  cluster via the REST API. This is used for Java based REST tests.
* **`ESClientYamlSuiteTestCase` **: A subclass of `ESRestTestCase` used to run
  YAML based REST tests.

=== Good practices

==== What kind of tests should I write?

            TestingConventionRule itRule = t.getNaming().maybeCreate("IT");
            itRule.baseClass("org.elasticsearch.test.ESIntegTestCase");
            itRule.baseClass("org.elasticsearch.test.rest.ESRestTestCase");
        });
        return testingConventions;
    }

            t.getNaming().create("IT", testingConventionRule -> {
                testingConventionRule.baseClass("org.elasticsearch.test.ESIntegTestCase");
                testingConventionRule.baseClass("org.elasticsearch.test.rest.ESRestTestCase");
                testingConventionRule.baseClass("org.elasticsearch.test.ESSingleNodeTestCase");
            });
        });

        project.afterEvaluate(p -> {