nedb-promises/test/a.create.test.js

const
    fs = require('fs'),
    path = require('path'),
    { expect } = require('chai'),
    Datastore = require('../src/Datastore')

const root = path.dirname(__dirname)

describe('testing datastore creation', () => {
    describe('new Datastore(\'test.db\')', () => {
        it('should create test.db based on string filename', () => {
            let datastore = Datastore.create('test.db')
            return datastore.load()
                .then(() => {
                    fs.unlinkSync(
                        path.join(root, 'test.db')
                    )
                })
        })
    })

    describe('new Datastore({ filename: \'test.db\' })', () => {
        it('sould create test.db based on object parameters', () => {
            let datastore = Datastore.create({ filename: 'test.db' })
            return datastore.load()
                .then(() => {
                    fs.unlinkSync(
                        path.join(root, 'test.db')
                    )
                })
        })
    })

    describe('new Datastore()', () => {
        it('should create in memory only database', (done) => {
            let datastore = Datastore.create()
            expect(datastore.__original.inMemoryOnly).to.equal(true)
            done()
        })
    })
})