@aller/blink/src/reducers/__tests__/article-preview.test.ts

A library for tracking user behaviour.

import articlePreviewReducer from '../article-preview';
import { ARTICLE_PREVIEW_SCREEN_ENTER, CLICK, PAGE_INIT } from '../../actions';

describe('articlePreviewReducer', () => {
  describe('articlePreviewScreenEnter', () => {
    it('should add into empty state', () => {
      const action = {
        type: ARTICLE_PREVIEW_SCREEN_ENTER,
        payload: {
          id: 'dagbladet.no/123',
          url: 'https://www.dagbladet.no/a/123',
          title: 'best title',
          height: 340,
          width: 231,
          personalizationParametersRequested: 'xavier-pluss',
          personalizationSystemUsed: 'cerebro',
          position: 10,
        },
      };
      expect(articlePreviewReducer({}, action)).toEqual({
        'dagbladet.no/123': {
          id: 'dagbladet.no/123',
          url: 'https://www.dagbladet.no/a/123',
          title: 'best title',
          height: 340,
          width: 231,
          personalizationParametersRequested: 'xavier-pluss',
          personalizationSystemUsed: 'cerebro',
          position: 10,
        },
      });
    });

    it('should add next to existing state', () => {
      const action = {
        type: ARTICLE_PREVIEW_SCREEN_ENTER,
        payload: {
          id: 'dagbladet.no/456',
          url: 'https://www.dagbladet.no/a/456',
          title: 'best title',
          height: 340,
          width: 231,
          personalizationParametersRequested: 'xavier-pluss',
          personalizationSystemUsed: 'cerebro',
          position: 10,
        },
      };
      const previousState = {
        'dagbladet.no/123': {
          id: 'dagbladet.no/123',
          url: 'https://www.dagbladet.no/a/123',
        },
      };
      expect(articlePreviewReducer(previousState, action)).toEqual({
        'dagbladet.no/123': {
          id: 'dagbladet.no/123',
          url: 'https://www.dagbladet.no/a/123',
        },
        'dagbladet.no/456': {
          id: 'dagbladet.no/456',
          url: 'https://www.dagbladet.no/a/456',
          title: 'best title',
          height: 340,
          width: 231,
          personalizationParametersRequested: 'xavier-pluss',
          personalizationSystemUsed: 'cerebro',
          position: 10,
        },
      });
    });
    it('should overwrite for existing state for same id', () => {
      const action = {
        type: ARTICLE_PREVIEW_SCREEN_ENTER,
        payload: {
          id: 'dagbladet.no/123',
          url: 'https://www.dagbladet.no/a/123',
          title: 'best title',
          height: 340,
          width: 231,
          personalizationParametersRequested: 'xavier-pluss',
          personalizationSystemUsed: 'cerebro',
          position: 10,
        },
      };
      const previousState = {
        'dagbladet.no/123': {
          id: 'dagbladet.no/123',
        },
      };
      expect(articlePreviewReducer(previousState, action)).toEqual({
        'dagbladet.no/123': {
          id: 'dagbladet.no/123',
          url: 'https://www.dagbladet.no/a/123',
          title: 'best title',
          height: 340,
          width: 231,
          personalizationParametersRequested: 'xavier-pluss',
          personalizationSystemUsed: 'cerebro',
          position: 10,
        },
      });
    });
  });

  describe('click', () => {
    it('should add into empty state', () => {
      const action = {
        type: CLICK,
        payload: {
          id: 'dagbladet.no/123',
          url: 'https://www.dagbladet.no/a/123',
        },
      };
      expect(articlePreviewReducer({}, action)).toEqual({
        'dagbladet.no/123': {
          id: 'dagbladet.no/123',
          url: 'https://www.dagbladet.no/a/123',
          clicked: true,
        },
      });
    });

    it('should not alter state given empty id', () => {
      const action = {
        type: CLICK,
        payload: {
          id: undefined,
          url: 'https://www.dagbladet.no/a/345',
        },
      };
      expect(articlePreviewReducer({}, action)).toEqual({});
    });
  });

  describe('pageInit', () => {
    it('should flush state', () => {
      const state = {
        'dagbladet.no / 123': {
          id: 'dagbladet.no/123',
          url: 'https://www.dagbladet.no/a/123',
          title: 'best title',
          height: 340,
          width: 231,
          personalizationParametersRequested: 'xavier-pluss',
          personalizationSystemUsed: 'cerebro',
          position: 10,
        },
      };
      const action = {
        type: PAGE_INIT,
        payload: { url: 'https://dagbladet.no/' },
      };
      expect(articlePreviewReducer(state, action)).toEqual({});
    });
  });
});