[MM-21551] Add search tests structure to test the search engines (#14031)

* WIP

* Adding bleve to go modules

* WIP

* Adding missing files from searchengine implementation

* WIP

* WIP

* WIP

* WIP

* WIP

* WIP

* User and channel indexing and searches implemented

* Make bleve tests run with in-memory indexes

* Implement post index and deletion tests

* Initial commits for the search layer

* Removing unnecesary indexing

* WIP

* WIP

* More fixes for tests

* Adding the search layer

* Finishing the migration of searchers to the layer

* Removing unnecesary code

* Allowing multiple engines active at the same time

* WIP

* Add simple post search

* Print information when using bleve

* Adding some debugging to understand better how the searches are working

* Making more dynamic config of search engines

* Add post search basics

* Adding the Purge API endpoint

* Fixing bleve config updates

* Adding missed file

* Regenerating search engine mocks

* Adding missed v5 to modules imports

* fixing i18n

* Fixing some test around search engine

* Removing all bleve traces

* Cleaning up the vendors directory and go.mod/go.sum files

* Regenerating timer layer

* Adding properly the license

* Fixing govet shadow error

* Fixing some tests

* Fixing TestSearchPostsFromUser

* Fixing another test

* Fixing more tests

* Fixing more tests

* Removing SearchEngine redundant text from searchengine module code

* Fixing some reindexing problems in members updates

* Fixing tests

* Addressing PR comments

* Reverting go.mod and go.sum

* Addressing PR comments

* Fixing tests compilation

* Fixing govet

* Adding search engine stop method

* Being more explicit on where we use includeDeleted

* Adding GetSqlSupplier test helper method

* Mocking elasticsearch start function

* Fixing tests

* Search tests

* Fix tests

* Fix mod

* Fixing searchEngine for test helpers with store mocks

* Remove loglines

* Fix i18n strings

* Migrate search posts tests

* Fix linter

* Do not run search tests if -short flag is enabled

* Migrate back store tests that didn't belong to the searchlayer

* Fix scopelint issues

Co-authored-by: Jesús Espino <jespinog@gmail.com>

store/searchlayer/layer.go

@@ -59,7 +59,7 @@ func (s SearchStore) indexUserFromID(userId string) {
 func (s SearchStore) indexUser(user *model.User) {
 	for _, engine := range s.searchEngine.GetActiveEngines() {
 		if engine.IsIndexingEnabled() {
-			go (func(engineCopy searchengine.SearchEngineInterface) {
+			runIndexFn(engine, func(engineCopy searchengine.SearchEngineInterface) {
 				userTeams, err := s.Team().GetTeamsByUserId(user.Id)
 				if err != nil {
 					mlog.Error("Encountered error indexing user", mlog.String("user_id", user.Id), mlog.String("search_engine", engineCopy.GetName()), mlog.Err(err))
@@ -87,7 +87,21 @@ func (s SearchStore) indexUser(user *model.User) {
 					return
 				}
 				mlog.Debug("Indexed user in search engine", mlog.String("search_engine", engineCopy.GetName()), mlog.String("user_id", user.Id))
-			})(engine)
+			})
 		}
 	}
 }
+
+// Runs an indexing function synchronously or asynchronously depending on the engine
+func runIndexFn(engine searchengine.SearchEngineInterface, indexFn func(searchengine.SearchEngineInterface)) {
+	if engine.IsIndexingSync() {
+		indexFn(engine)
+		if err := engine.RefreshIndexes(); err != nil {
+			mlog.Error("Encountered error refresh the indexes", mlog.Err(err))
+		}
+	} else {
+		go (func(engineCopy searchengine.SearchEngineInterface) {
+			indexFn(engineCopy)
+		})(engine)
+	}
+}