Add store unit tests and add make target for testing store with postgres (#5925)

* Add store unit tests and add make target for testing store with postgres

* Remove postgres target form test-server target

* Fix audit test

store/sql_channel_store.go

@@ -1257,58 +1257,6 @@ func (s SqlChannelStore) PermanentDeleteMembersByUser(userId string) StoreChanne
 	return storeChannel
 }
 
-func (s SqlChannelStore) SetLastViewedAt(channelId string, userId string, newLastViewedAt int64) StoreChannel {
-	storeChannel := make(StoreChannel, 1)
-
-	go func() {
-		result := StoreResult{}
-
-		var query string
-
-		if utils.Cfg.SqlSettings.DriverName == model.DATABASE_DRIVER_POSTGRES {
-			query = `UPDATE
-				ChannelMembers
-			SET
-			    MentionCount = 0,
-			    MsgCount = Channels.TotalMsgCount - (SELECT COUNT(*)
-			    					 FROM Posts
-			    					 WHERE ChannelId = :ChannelId
-			    					 AND CreateAt > :NewLastViewedAt),
-			    LastViewedAt = :NewLastViewedAt
-			FROM
-				Channels
-			WHERE
-			    Channels.Id = ChannelMembers.ChannelId
-			        AND UserId = :UserId
-			        AND ChannelId = :ChannelId`
-		} else if utils.Cfg.SqlSettings.DriverName == model.DATABASE_DRIVER_MYSQL {
-			query = `UPDATE
-				ChannelMembers, Channels
-			SET
-			    ChannelMembers.MentionCount = 0,
-			    ChannelMembers.MsgCount = Channels.TotalMsgCount - (SELECT COUNT(*)
-										FROM Posts
-										WHERE ChannelId = :ChannelId
-										AND CreateAt > :NewLastViewedAt),
-			    ChannelMembers.LastViewedAt = :NewLastViewedAt
-			WHERE
-			    Channels.Id = ChannelMembers.ChannelId
-			        AND UserId = :UserId
-			        AND ChannelId = :ChannelId`
-		}
-
-		_, err := s.GetMaster().Exec(query, map[string]interface{}{"ChannelId": channelId, "UserId": userId, "NewLastViewedAt": newLastViewedAt})
-		if err != nil {
-			result.Err = model.NewLocAppError("SqlChannelStore.SetLastViewedAt", "store.sql_channel.set_last_viewed_at.app_error", nil, "channel_id="+channelId+", user_id="+userId+", "+err.Error())
-		}
-
-		storeChannel <- result
-		close(storeChannel)
-	}()
-
-	return storeChannel
-}
-
 func (s SqlChannelStore) UpdateLastViewedAt(channelIds []string, userId string) StoreChannel {
 	storeChannel := make(StoreChannel, 1)