text: describe('WalkontableCore', () => {
    let $table;
    let $container;
    let $wrapper;
    const debug = false;
  
    beforeEach(() => {
      $wrapper = $('<div></div>').css({ overflow: 'hidden' });
      $container = $('<div></div>');
      $table = $('<table></table>'); // create a table that is not attached to document
      $wrapper.append($container);
      $container.append($table);
      $wrapper.appendTo('body');
      createDataArray(100, 4);
    });
  
    afterEach(() => {
      if (!debug) {
        $('.wtHolder').remove();
      }
  
      $wrapper.remove();
    });
  
    it('first row should have the same text as in data source', () => {
      const wt = new Walkontable.Core({
        table: $table[0],
        data: getData,
        totalRows: getTotalRows,
        totalColumns: getTotalColumns
      });
      wt.draw();
      const TDs = $table.find('tbody tr:first td');
      expect(TDs[0].innerHTML).toBe('0');
      expect(TDs[1].innerHTML).toBe('a');
    });
  
    it('should bootstrap table if empty TABLE is given', () => {
      $wrapper.width(200).height(200);
  
      const wt = new Walkontable.Core({
        table: $table[0],
        data: getData,
        totalRows: getTotalRows,
        totalColumns: getTotalColumns,
        renderAllRows: true
      });
      wt.draw();
  
      expect($table.find('td').length).toBe(400);
    });
  
    it('should bootstrap column headers if THEAD is given', () => {
      $table.remove();
      $table = $('<table><thead><tr><th>A</th><th>B</th><th>C</th><th>D</th></tr></thead></table>');
      $table.appendTo('body');
  
      const wt = new Walkontable.Core({
        table: $table[0],
        data: getData,
        totalRows: getTotalRows,
        totalColumns: getTotalColumns,
        rowHeaders: [function(row, TH) {
          TH.innerHTML = row + 1;
        }]
      });
      wt.draw();
      expect($table.find('thead th').length).toBe(5); // include corner TH
      expect($table.find('tbody tr:first th').length).toBe(1);
      expect($table.find('tbody tr:first td').length).toBe(4);
    });
  
    it('should figure out how many columns to display if width param given', () => {
      $wrapper.width(100);
  
      const wt = new Walkontable.Core({
        table: $table[0],
        data: getData,
        totalRows: getTotalRows,
        totalColumns: getTotalColumns
      });
      wt.draw();
      expect($table.find('tbody tr:first td').length).toBe(2);
    });
  
    it('should not render table that is removed from DOM', () => {
      $wrapper.remove();
      const wt = new Walkontable.Core({
        table: $table[0],
        data: getData,
        totalRows: getTotalRows,
        totalColumns: getTotalColumns
      });
      wt.draw();
      expect(wt.drawn).toBe(false);
      expect(wt.drawInterrupted).toBe(true);
    });
  
    it('should not render table that is `display: none`', () => {
      const $div = $('<div style="display: none"></div>').appendTo('body');
      $div.append($table);
  
      const wt = new Walkontable.Core({
        table: $table[0],
        data: getData,
        totalRows: getTotalRows,
        totalColumns: getTotalColumns
      });
      wt.draw();
      expect(wt.drawn).toBe(false);
      expect(wt.drawInterrupted).toBe(true);
  
      $div.remove();
    });
  
    it('should render empty table (limited height)', () => {
      createDataArray(0, 5);
  
      const wt = new Walkontable.Core({
        table: $table[0],
        data: getData,
        totalRows: getTotalRows,
        totalColumns: getTotalColumns
      });
      wt.draw();
  
      expect(() => {
        wt.draw(); // second render was giving "Cannot read property 'firstChild' of null" sometimes
      }).not.toThrow();
    });
  
    it('should render empty table (unlimited height)', () => {
      createDataArray(0, 5);
  
      const wt = new Walkontable.Core({
        table: $table[0],
        data: getData,
        totalRows: getTotalRows,
        totalColumns: getTotalColumns
      });
      wt.draw();
  
      expect(() => {
        wt.draw(); // second render was giving "Cannot read property 'firstChild' of null" sometimes
      }).not.toThrow();
    });
  
    it('should render empty then filled table (limited height)', () => {
      createDataArray(0, 5);
  
      const wt = new Walkontable.Core({
        table: $table[0],
        data: getData,
        totalRows: getTotalRows,
        totalColumns: getTotalColumns
      });
      wt.draw();
      createDataArray(1, 5);
  
      expect(() => {
        wt.draw(); // second render was giving "Cannot read property 'firstChild' of null" sometimes
      }).not.toThrow();
    });
  
    it('should render empty then filled table (unlimited height)', () => {
      createDataArray(0, 5);
  
      const wt = new Walkontable.Core({
        table: $table[0],
        data: getData,
        totalRows: getTotalRows,
        totalColumns: getTotalColumns
      });
      wt.draw();
      createDataArray(1, 5);
  
      expect(() => {
        wt.draw(); // second render was giving "Cannot read property 'firstChild' of null" sometimes
      }).not.toThrow();
    });
  
    it('should render table with rows but no columns', () => {
      createDataArray(5, 0);
  
      const wt = new Walkontable.Core({
        table: $table[0],
        data: getData,
        totalRows: getTotalRows,
        totalColumns: getTotalColumns
      });
      wt.draw();
  
      expect($table.find('tbody tr').length).toBe(5);
      expect($table.find('tbody td').length).toBe(0);
      expect($table.find('tbody col').length).toBe(0);
    });
  });
  