MM-9274- Sort Users in Channel by status (#8181)

* sort by lastActivity

* added status ordering to Users

* sort offline before dnd

* remove data not needed

* added seperate call for when order=‘status’ is on GetUser request

* remove PrintLn

* styling fix

* remove mistake

* mistake 2

* better comment

* explicit if statemnt

* writing tests

* removed manually added mocks

* generated mock

* ICU-668 Added unit tests

* style fix

* sort by lastActivity

* added status ordering to Users

* sort offline before dnd

* remove data not needed

* added seperate call for when order=‘status’ is on GetUser request

* remove PrintLn

* styling fix

* remove mistake

* mistake 2

* better comment

* explicit if statemnt

* writing tests

* removed manually added mocks

* generated mock

* ICU-668 Added unit tests

* style fix

* reverse dnd and offline

* Fixed app.SaveStatusAndBroadcast

* Fixed incorrect merge

* Fixing incorrect merge again

app/status_test.go

@@ -0,0 +1,40 @@
+// Copyright (c) 2016-present Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+package app
+
+import (
+	"testing"
+
+	"github.com/mattermost/mattermost-server/model"
+)
+
+func TestSaveStatus(t *testing.T) {
+	th := Setup().InitBasic()
+	defer th.TearDown()
+
+	user := th.BasicUser
+
+	for _, statusString := range []string{
+		model.STATUS_ONLINE,
+		model.STATUS_AWAY,
+		model.STATUS_DND,
+		model.STATUS_OFFLINE,
+	} {
+		t.Run(statusString, func(t *testing.T) {
+			status := &model.Status{
+				UserId: user.Id,
+				Status: statusString,
+			}
+
+			th.App.SaveAndBroadcastStatus(status)
+
+			after, err := th.App.GetStatus(user.Id)
+			if err != nil {
+				t.Fatalf("failed to get status after save: %v", err)
+			} else if after.Status != statusString {
+				t.Fatalf("failed to save status, got %v, expected %v", after.Status, statusString)
+			}
+		})
+	}
+}