Afternoon all
I have been struggling to find a solid solution to the following.
How do I unit tests NodeJS code which makes use of MongoDB ?
I would like to write isolated unit tests, without actually spinning up any database for the purpose of testing.
Example code I would like to test:
DatabaseService.js
var mongodb = require('mongodb');
var exports = module.exports = (function () {
var MongoClient = mongodb.MongoClient;
var db = null;
function getDB(){
return db;
}
const connect = (
options
) => {
return new Promise((resolve, reject) => {
var host = options.host;
var port = options.port;
var dbName = options.dbName;
var url = 'mongodb://' + host + ':' + port;
// Use connect method to connect to the server
MongoClient.connect(url, function(err, client) {
if(error){
return reject(false);
}
const db = client.db(dbName);
return resolve(true);
});
});
};
return {
connect: connect,
getDB: getDB
};
})();
UserService.js
var DatabaseService = require("./DatabaseService");
var exports = module.exports = (function () {
const createUser = (
options
) => {
return new Promise((resolve, reject) => {
var db = DatabaseService.getDB();
var firstName = options.firstName;
var lastName = options.lastName;
db.collection('users').insertOne({
firstName: firstName,
lastName: lastName
},
function(error, result) {
if (error){
return reject(false);
}
return resolve(result);
});
});
};
return {
createUser: createUser
};
})();
