Function addInitialIndexAttribute

src/cdk/table/table.spec.ts:159–170

()

    describe('should correctly use the differ to add/remove/move rows', () => {
      function addInitialIndexAttribute() {
        // Each row receives an attribute 'initialIndex' the element's original place
        getRows(tableElement).forEach((row: Element, index: number) => {
          row.setAttribute('initialIndex', index.toString());
        });

        // Prove that the attributes match their indicies
        const initialRows = getRows(tableElement);
        expect(initialRows[0].getAttribute('initialIndex')).toBe('0');
        expect(initialRows[1].getAttribute('initialIndex')).toBe('1');
        expect(initialRows[2].getAttribute('initialIndex')).toBe('2');
      }

      it('when the data is heterogeneous', () => {
        addInitialIndexAttribute();