salix/back/methods/collection/spec/setSaleQuantity.spec.js

const models = require('vn-loopback/server/server').models;

describe('setSaleQuantity()', () => {
    it('should change quantity sale', async() => {
        const tx = await models.Ticket.beginTransaction({});

        try {
            const options = {transaction: tx};

            const saleId = 30;
            const newQuantity = 10;

            const originalSale = await models.Sale.findById(saleId, null, options);

            await models.Collection.setSaleQuantity(saleId, newQuantity, options);
            const updateSale = await models.Sale.findById(saleId, null, options);

            expect(updateSale.originalQuantity).toEqual(originalSale.quantity);
            expect(updateSale.quantity).toEqual(newQuantity);

            await tx.rollback();
        } catch (e) {
            await tx.rollback();
            throw e;
        }
    });
});