Adds utils for installing specific detection rule package in FTRs

x-pack/test/detection_engine_api_integration/utils/install_detection_rules_package_from_fleet.ts

@@ -0,0 +1,61 @@
+/*
+ * 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; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import { epmRouteService } from '@kbn/fleet-plugin/common';
+import { InstallPackageResponse } from '@kbn/fleet-plugin/common/types';
+import type { ToolingLog } from '@kbn/tooling-log';
+import type SuperTest from 'supertest';
+
+/**
+ * Installed the security_detection_engine package via fleet API. Will
+ * @param supertest The supertest deps
+ * @param log The tooling logger
+ * @param version The version to install, e.g. '8.4.1'
+ * @param overrideExistingPackage Whether or not to force the install
+ */
+export const installDetectionRulesPackageFromFleet = async (
+  supertest: SuperTest.SuperTest<SuperTest.Test>,
+  log: ToolingLog,
+  version: string,
+  overrideExistingPackage: true
+): Promise<InstallPackageResponse> => {
+  const response = await supertest
+    .post(epmRouteService.getInstallPath('security_detection_engine', version))
+    .set('kbn-xsrf', 'true')
+    .send({
+      force: overrideExistingPackage,
+    });
+  if (response.status !== 200) {
+    log.error(
+      `Did not get an expected 200 "ok" when installing 'security_detection_engine' fleet package'. body: ${JSON.stringify(
+        response.body
+      )}, status: ${JSON.stringify(response.status)}`
+    );
+  }
+  return response.body;
+};
+
+/**
+ * Returns the `--xpack.securitySolution.prebuiltRulesPackageVersion=8.3.1` setting
+ * as configured in the kbnServerArgs from the test's config.ts.
+ * @param kbnServerArgs Kibana server args within scope
+ */
+export const getPrebuiltRulesPackageVersionFromServerArgs = (kbnServerArgs: string[]): string => {
+  const re =
+    /--xpack\.securitySolution\.prebuiltRulesPackageVersion=(?<prebuiltRulesPackageVersion>.*)/;
+  for (const serverArg of kbnServerArgs) {
+    const match = re.exec(serverArg);
+    const prebuiltRulesPackageVersion = match?.groups?.prebuiltRulesPackageVersion;
+    if (prebuiltRulesPackageVersion) {
+      return prebuiltRulesPackageVersion;
+    }
+  }
+
+  throw Error(
+    'xpack.securitySolution.prebuiltRulesPackageVersion is not set in the server arguments'
+  );
+};