grafana/public/app/features/dashboard/state/PanelQueryRunner.test.ts

import { getProcessedSeriesData } from './PanelQueryRunner';

describe('QueryRunner', () => {
  it('converts timeseries to table skipping nulls', () => {
    const input1 = {
      target: 'Field Name',
      datapoints: [[100, 1], [200, 2]],
    };
    const input2 = {
      // without target
      target: '',
      datapoints: [[100, 1], [200, 2]],
    };
    const data = getProcessedSeriesData([null, input1, input2, null, null]);
    expect(data.length).toBe(2);
    expect(data[0].fields[0].name).toBe(input1.target);
    expect(data[0].rows).toBe(input1.datapoints);

    // Default name
    expect(data[1].fields[0].name).toEqual('Value');

    // Every colun should have a name and a type
    for (const table of data) {
      for (const column of table.fields) {
        expect(column.name).toBeDefined();
        expect(column.type).toBeDefined();
      }
    }
  });

  it('supports null values from query OK', () => {
    expect(getProcessedSeriesData([null, null, null, null])).toEqual([]);
    expect(getProcessedSeriesData(undefined)).toEqual([]);
    expect(getProcessedSeriesData((null as unknown) as any[])).toEqual([]);
    expect(getProcessedSeriesData([])).toEqual([]);
  });
});