text: /*global cy*/
  
  /**
   * Page Object for interacting with Link component.
   * @param {number} index - the index of the link.
   * @returns {undefined}
   */
  function LinkPO(index) {
      this.index = index;
  
      this.getLine = () => cy.get('path[class="link"]').then(lines => lines[this.index]);
      this.getStyle = () => this.getLine().invoke('attr', 'style');
      this.shouldHaveColor = color => this.getStyle().should('contain', `stroke: ${color};`);
      this.shouldHaveOpacity = opacity => this.getStyle().should('contain', `opacity: ${opacity};`);
      this.hasMarker = () =>
          this.getLine()
              .invoke('attr', 'marker-end')
              .should('contain', 'url(#marker-');
  }
  
  module.exports = LinkPO;
  