Tests for request validation middleware

test_request_param.js

const sinon  = require('sinon');

const should = require('should');

describe('validate Params middleware', () => {
    it('When param is required', () => {
        let nextSpy = sinon.spy();
        let response = function () {};
        response.send = sinon.spy();
        validateParams([{
                type: 'string',
                required: true,
                param_key: 'param_1',
                validator_functions: []
        }])(sinon.useFakeXMLHttpRequest(), response, nextSpy);
        response.send.args[0][0].should.equal(400);
        response.send.args[0][1].result.should.equal(
            'Missing Parameter param_1');
    });
    it('When param type is different', () => {
        let nextSpy = sinon.spy();
        let response = function () {};
        response.send = sinon.spy();
        let request = sinon.useFakeXMLHttpRequest();
        request.params = {
            param_1: 908998989
        };
        validateParams([{
                type: 'string',
                required: true,
                param_key: 'param_1',
                validator_functions: []
        }])(request, response, nextSpy);
        response.send.args[0][0].should.equal(400);
        response.send.args[0][1].result.should.equal(
            'param_1 is of type Number but should be string');
    });
    it('When validation test passes', () => {
        let nextSpy = sinon.spy();
        let response = function () {};
        response.send = sinon.spy();
        let request = sinon.useFakeXMLHttpRequest();
        request.params = {
            param_1: '9089980989'
        };
        validateParams([{
                type: 'string',
                required: true,
                param_key: 'param_1',
                validator_functions: []
        }])(request, response, nextSpy);
        nextSpy.calledOnce.should.be.true();
    });
});