how to create mongoose connection when testing with gulp mocha -


i want make gulp task run tests mocha 1 single command. (my test need connection db mongoose)

then got error: { [error: trying open unclosed connection.] state: 1 }

after research, found post: mongoose trying open unclosed connection

it said should use createconnection() instead of 'connect()`.

here question now:

how use before , after test, , how call done after db connected before go through each test cases?

following gulp task:

gulp.task('mocha', function () {   var testfile = argv['f'];   var fullpaths;   if (testfile) {     fullpaths = paths.server + 'tests/' + testfile;   } else {     fullpaths = serverunittestfiles;   }   var dbconnectionmodulepath = paths.server + 'tests/db-connection.js';   var dbconnection = gulp.src(dbconnectionmodulepath, { read: false });   var tests = gulp.src(fullpaths, { read: false });   return series(dbconnection, tests)       .pipe(mocha({ reporter: 'nyan' })); });

and here db-connection.js module:

'use strict';  var mongoose = require('mongoose'),     connection = mongoose.connection,     dbname = 'learnmongo';  before(function (done) {   connection.on('error', console.error);   connection.once('open', function () {     done();   });   mongoose.connect('mongodb://localhost:27017/' + dbname); });  after(function (done) {   connection.close(done); });

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