[Migrations] Provide testing archives + tooling for migrations integr…

…ation tests (elastic#193328)

## Summary

Part of elastic/kibana-team#1113

* Creates zip packages that can be used by multiple tests.
* Provides tooling to easily create new packages with any desired data
and ES version.
* Fixes some of the failing tests with the newly created archives.

packages/kbn-test/src/es/test_es_cluster.ts

@@ -71,6 +71,7 @@ export interface CreateTestEsClusterOptions {
    * `['key.1=val1', 'key.2=val2']`
    */
   esArgs?: string[];
+  esVersion?: string;
   esFrom?: string;
   esServerlessOptions?: Pick<
     ServerlessOptions,
@@ -169,6 +170,7 @@ export function createTestEsCluster<
     log,
     writeLogsToPath,
     basePath = Path.resolve(REPO_ROOT, '.es'),
+    esVersion = esTestConfig.getVersion(),
     esFrom = esTestConfig.getBuildFrom(),
     esServerlessOptions,
     dataArchive,
@@ -196,7 +198,7 @@ export function createTestEsCluster<
   const esArgs = assignArgs(defaultEsArgs, customEsArgs);
 
   const config = {
-    version: esTestConfig.getVersion(),
+    version: esVersion,
     installPath: Path.resolve(basePath, clusterName),
     sourcePath: Path.resolve(REPO_ROOT, '../elasticsearch'),
     password,

src/core/server/integration_tests/saved_objects/migrations/group1/create_test_archives.test.ts

@@ -0,0 +1,39 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the "Elastic License
+ * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side
+ * Public License v 1"; you may not use this file except in compliance with, at
+ * your election, the "Elastic License 2.0", the "GNU Affero General Public
+ * License v3.0 only", or the "Server Side Public License, v 1".
+ */
+
+import { getBaselineDocuments } from '../kibana_migrator_test_kit.fixtures';
+import {
+  BASELINE_DOCUMENTS_PER_TYPE_1K,
+  BASELINE_DOCUMENTS_PER_TYPE_500K,
+  BASELINE_ELASTICSEARCH_VERSION,
+  BASELINE_TEST_ARCHIVE_1K,
+  BASELINE_TEST_ARCHIVE_500K,
+  createBaselineArchive,
+} from '../kibana_migrator_archive_utils';
+
+/**
+ * Enable and execute this test ONLY IN YOUR DEV MACHINE, in order to build new test packages
+ */
+describe.skip('migration tests toolkit', () => {
+  it('can create a 1k documents ZIP archive', async () => {
+    await createBaselineArchive({
+      esVersion: BASELINE_ELASTICSEARCH_VERSION,
+      documents: getBaselineDocuments({ documentsPerType: BASELINE_DOCUMENTS_PER_TYPE_1K }),
+      dataArchive: BASELINE_TEST_ARCHIVE_1K,
+    });
+  });
+
+  it('can create a 400k documents ZIP archive', async () => {
+    await createBaselineArchive({
+      esVersion: BASELINE_ELASTICSEARCH_VERSION,
+      documents: getBaselineDocuments({ documentsPerType: BASELINE_DOCUMENTS_PER_TYPE_500K }),
+      dataArchive: BASELINE_TEST_ARCHIVE_500K,
+    });
+  });
+});