Mono repo -> Master (#22553)

Combines the following repositories into one:

https://github.com/mattermost/mattermost-server
https://github.com/mattermost/mattermost-webapp
https://github.com/mattermost/focalboard
https://github.com/mattermost/mattermost-plugin-playbooks

server/platform/services/searchengine/utils_test.go

@@ -0,0 +1,57 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package searchengine
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestElasticsearchGetSuggestionsSplitBy(t *testing.T) {
+	testCases := []struct {
+		Name     string
+		Term     string
+		SplitStr string ``
+		Expected []string
+	}{
+		{
+			Name:     "Single string",
+			Term:     "string",
+			SplitStr: " ",
+			Expected: []string{"string"},
+		},
+		{
+			Name:     "String with spaces",
+			Term:     "String with spaces",
+			SplitStr: " ",
+			Expected: []string{"string with spaces", "with spaces", "spaces"},
+		},
+		{
+			Name:     "Username split by a dot",
+			Term:     "name.surname",
+			SplitStr: ".",
+			Expected: []string{"name.surname", ".surname", "surname"},
+		},
+		{
+			Name:     "String split by several dashes",
+			Term:     "one-two-three",
+			SplitStr: "-",
+			Expected: []string{"one-two-three", "-two-three", "two-three", "-three", "three"},
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.Name, func(t *testing.T) {
+			res := GetSuggestionInputsSplitBy(tc.Term, tc.SplitStr)
+			assert.ElementsMatch(t, res, tc.Expected)
+		})
+	}
+}
+
+func TestElasticsearchGetSuggestionsSplitByMultiple(t *testing.T) {
+	r1 := GetSuggestionInputsSplitByMultiple("String with user.name", []string{" ", "."})
+	expectedR1 := []string{"string with user.name", "with user.name", "user.name", ".name", "name"}
+	assert.ElementsMatch(t, r1, expectedR1)
+}