Simple Chat Room in NodeJS, expressJS and mongoDB in Docker Swarm
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'use strict';
module.exports = function allServersUnknown(topologyDescription) {
if (topologyDescription == null ||
topologyDescription.constructor.name !== 'TopologyDescription') {
return false;
}
return Array.from(topologyDescription.servers.values()).
every(server => server.type === 'Unknown');
};