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

describe('sale updateQuantity()', () => {
    const ctx = {
        req: {
            accessToken: {userId: 9},
            headers: {origin: 'localhost:5000'},
            __: () => {}
        }
    };

    it('should throw an error if the quantity is not a number', async() => {
        const tx = await models.Sale.beginTransaction({});

        let error;
        try {
            const options = {transaction: tx};

            await models.Sale.updateQuantity(ctx, 1, 'wrong quantity!', options);

            await tx.rollback();
        } catch (e) {
            await tx.rollback();
            error = e;
        }

        expect(error).toEqual(new Error('The value should be a number'));
    });

    it('should throw an error if the quantity is greater than it should be', async() => {
        const tx = await models.Sale.beginTransaction({});

        let error;
        try {
            const options = {transaction: tx};

            await models.Sale.updateQuantity(ctx, 1, 99, options);

            await tx.rollback();
        } catch (e) {
            await tx.rollback();
            error = e;
        }

        expect(error).toEqual(new Error('The new quantity should be smaller than the old one'));
    });

    it('should update the quantity of a given sale current line', async() => {
        const tx = await models.Sale.beginTransaction({});

        try {
            const options = {transaction: tx};

            const originalLine = await models.Sale.findOne({where: {id: 1}, fields: ['quantity']}, options);

            expect(originalLine.quantity).toEqual(5);

            await models.Sale.updateQuantity(ctx, 1, 4, options);

            const modifiedLine = await models.Sale.findOne({where: {id: 1}, fields: ['quantity']}, options);

            expect(modifiedLine.quantity).toEqual(4);

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