@optimizely/optimizely-sdk/lib/plugins/event_dispatcher/index.browser.tests.js

JavaScript SDK for Optimizely X Full Stack

/**
 * Copyright 2016-2017, 2020, Optimizely
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import { assert } from 'chai';
import sinon from 'sinon';

import { dispatchEvent } from './index.browser';

describe('lib/plugins/event_dispatcher/browser', function() {
  describe('APIs', function() {
    describe('dispatchEvent', function() {
      beforeEach(function() {
        this.requests = [];
        global.XMLHttpRequest = sinon.useFakeXMLHttpRequest();
        global.XMLHttpRequest.onCreate = (req) => { this.requests.push(req); };
      });

      afterEach(function() {
        delete global.XMLHttpRequest
      });

      it('should send a POST request with the specified params', function(done) {
        var eventParams = { testParam: 'testParamValue' };
        var eventObj = {
          url: 'https://cdn.com/event',
          body: {
            id: 123,
          },
          httpVerb: 'POST',
          params: eventParams,
        };

        var callback = sinon.spy();
        dispatchEvent(eventObj, callback);
        assert.strictEqual(1, this.requests.length);
        assert.strictEqual(this.requests[0].method, 'POST');
        assert.strictEqual(this.requests[0].requestBody, JSON.stringify(eventParams));
        done();
      });

      it('should execute the callback passed to event dispatcher with a post', function(done) {
        var eventParams = { testParam: 'testParamValue' };
        var eventObj = {
          url: 'https://cdn.com/event',
          body: {
            id: 123,
          },
          httpVerb: 'POST',
          params: eventParams,
        };

        var callback = sinon.spy();
        dispatchEvent(eventObj, callback);
        this.requests[0].respond([
          200,
          {},
          '{"url":"https://cdn.com/event","body":{"id":123},"httpVerb":"POST","params":{"testParam":"testParamValue"}}',
        ]);
        sinon.assert.calledOnce(callback);
        done();
      });

      it('should execute the callback passed to event dispatcher with a get', function(done) {
        var eventObj = {
          url: 'https://cdn.com/event',
          httpVerb: 'GET',
        };

        var callback = sinon.spy();
        dispatchEvent(eventObj, callback);
        this.requests[0].respond([200, {}, '{"url":"https://cdn.com/event","httpVerb":"GET"']);
        sinon.assert.calledOnce(callback);
        done();
      });
    });
  });
});