graphql-validity/test/express-middleware.js

Make business logic validation easy on the graphql side without adding any declarations or modifications to the existing graphql schema.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const sinon = require("sinon");
const chai_1 = require("chai");
const validation = require("../src/validation");
const profiling_1 = require("../src/profiling");
const express_middleware_1 = require("../src/express-middleware");
const mocks_1 = require("./helpers/mocks");
describe('express-middleware', () => {
    let profilingResultHandler = {
        handler: profiling_1.defaultProfilingResultHandler
    };
    let req;
    let write;
    let send;
    let res;
    let next;
    let result;
    let resFake;
    let applyValidationFake;
    let sandbox;
    beforeEach(() => {
        resFake = sinon.fake();
        req = { __graphQLValidity: undefined };
        write = () => { };
        send = () => { };
        res = {
            write,
            send: resFake
        };
        next = () => { };
        applyValidationFake = sinon.fake();
        const mockValidation = mocks_1.mockModule(validation, {
            applyValidation: applyValidationFake
        });
        sandbox = sinon.createSandbox();
        mockValidation(sandbox);
        result = express_middleware_1.default(profilingResultHandler);
    });
    afterEach(() => {
        sandbox.restore();
    });
    it('should return wrapper function', () => {
        chai_1.expect(result).to.be.an('function');
    });
    describe('graphQLValidityExpressMiddleware', () => {
        it('should replace original write and send functions with wrappers and add validity data to request', () => {
            result(req, res, next);
            chai_1.expect(res.write).to.not.equal(write);
            chai_1.expect(res.send).to.not.equal(send);
        });
        it('should add validity data to request', () => {
            chai_1.expect(req.__graphQLValidity).to.not.be.null;
        });
    });
    describe('wrapOriginalResponder', () => {
        it('should call original function after execution', () => {
            res.send('{}');
            chai_1.expect(resFake.callCount).to.equal(1);
        });
        it('should call validation function only once', () => {
            result(req, res, next);
            res.send('{}');
            res.send('{}');
            chai_1.expect(applyValidationFake.callCount).to.equal(1);
        });
        it('should not throw exception if output data is not in JSON format', () => {
            result(req, res, next);
            chai_1.expect(res.write).to.not.throw('');
        });
    });
});
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