grafana/public/app/plugins/datasource/tempo/resultTransformer.test.ts

import { FieldType, MutableDataFrame } from '@grafana/data';
import { createTableFrame, transformToOTLP } from './resultTransformer';
import { otlpDataFrame, otlpResponse } from './testResponse';

describe('transformTraceList()', () => {
  const lokiDataFrame = new MutableDataFrame({
    fields: [
      {
        name: 'ts',
        type: FieldType.time,
        values: ['2020-02-12T15:05:14.265Z', '2020-02-12T15:05:15.265Z', '2020-02-12T15:05:16.265Z'],
      },
      {
        name: 'line',
        type: FieldType.string,
        values: [
          't=2020-02-12T15:04:51+0000 lvl=info msg="Starting Grafana" logger=server',
          't=2020-02-12T15:04:52+0000 lvl=info msg="Starting Grafana" logger=server traceID=asdfa1234',
          't=2020-02-12T15:04:53+0000 lvl=info msg="Starting Grafana" logger=server traceID=asdf88',
        ],
      },
    ],
    meta: {
      preferredVisualisationType: 'table',
    },
  });

  test('extracts traceIDs from log lines', () => {
    const frame = createTableFrame(lokiDataFrame, 't1', 'tempo', ['traceID=(\\w+)', 'traceID=(\\w\\w)']);
    expect(frame.fields[0].name).toBe('Time');
    expect(frame.fields[0].values.get(0)).toBe('2020-02-12T15:05:15.265Z');
    expect(frame.fields[1].name).toBe('traceID');
    expect(frame.fields[1].values.get(0)).toBe('asdfa1234');
    // Second match in new line
    expect(frame.fields[0].values.get(1)).toBe('2020-02-12T15:05:15.265Z');
    expect(frame.fields[1].values.get(1)).toBe('as');
  });
});

describe('transformToOTLP()', () => {
  test('transforms dataframe to OTLP format', () => {
    const otlp = transformToOTLP(otlpDataFrame);
    expect(otlp).toMatchObject(otlpResponse);
  });
});