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

JavaScript SDK for Optimizely X Full Stack

/**
 * Copyright 2016-2018, 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 nock from 'nock';
import sinon from 'sinon';
import { assert } from 'chai';

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

describe('lib/plugins/event_dispatcher/node', function() {
  describe('APIs', function() {
    describe('dispatchEvent', function() {
      var stubCallback = {
        callback: function() {},
      };

      beforeEach(function() {
        sinon.stub(stubCallback, 'callback');
        nock('https://cdn.com')
          .post('/event')
          .reply(200, {
            ok: true,
          });
      });

      afterEach(function() {
        stubCallback.callback.restore();
        nock.cleanAll();
      });

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

        dispatchEvent(eventObj, function(resp) {
          assert.equal(200, resp.statusCode);
          done();
        });
      });

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

        dispatchEvent(eventObj, stubCallback.callback)
          .on('response', function(response) {
            sinon.assert.calledOnce(stubCallback.callback);
            done();
          })
          .on('error', function(error) {
            assert.fail('status code okay', 'status code not okay', '');
          });
      });

      it('rejects GET httpVerb', function() {
        var eventObj = {
          url: 'https://cdn.com/event',
          params: {
            id: 123,
          },
          httpVerb: 'GET',
        };

        var callback = sinon.spy();
        dispatchEvent(eventObj, callback);
        sinon.assert.notCalled(callback);
      });

      describe('in the event of an error', function() {
        beforeEach(function() {
          nock('https://example')
            .post('/event')
            .replyWithError('Connection error')
        });

        it('does not throw', function() {
          var eventObj = {
            url: 'https://example/event',
            params: {},
            httpVerb: 'POST',
          };

          var callback = sinon.spy();
          dispatchEvent(eventObj, callback);
          sinon.assert.notCalled(callback);
        });
      });
    });
  });
});