[Ingest]: add more test for transform index (#79154)

Author: nnamdifrankie

x-pack/test/ingest_manager_api_integration/apis/epm/install_remove_assets.ts

@@ -91,6 +91,14 @@ export default function (providerContext: FtrProviderContext) {
         });
         expect(res.statusCode).equal(200);
       });
+      it('should have created the index for the transform', async function () {
+        // the  index is defined in the transform file
+        const res = await es.transport.request({
+          method: 'GET',
+          path: `/logs-all_assets.test_log_current_default`,
+        });
+        expect(res.statusCode).equal(200);
+      });
       it('should have installed the kibana assets', async function () {
         const resIndexPatternLogs = await kibanaServer.savedObjects.get({
           type: 'index-pattern',
@@ -260,6 +268,19 @@ export default function (providerContext: FtrProviderContext) {
         );
         expect(res.statusCode).equal(404);
       });
+      it('should have deleted the index for the transform', async function () {
+        // the  index is defined in the transform file
+        const res = await es.transport.request(
+          {
+            method: 'GET',
+            path: `/logs-all_assets.test_log_current_default`,
+          },
+          {
+            ignore: [404],
+          }
+        );
+        expect(res.statusCode).equal(404);
+      });
       it('should have uninstalled the kibana assets', async function () {
         let resDashboard;
         try {