grafana/public/app/plugins/datasource/loki/languageUtils.test.ts

import { escapeLabelValueInExactSelector, isBytesString, unescapeLabelValue } from './languageUtils';

describe('isBytesString', () => {
  it('correctly matches bytes string with integers', () => {
    expect(isBytesString('500b')).toBe(true);
    expect(isBytesString('2TB')).toBe(true);
  });
  it('correctly matches bytes string with float', () => {
    expect(isBytesString('500.4kib')).toBe(true);
    expect(isBytesString('10.4654Mib')).toBe(true);
  });
  it('does not match integer without unit', () => {
    expect(isBytesString('500')).toBe(false);
    expect(isBytesString('10')).toBe(false);
  });
  it('does not match float without unit', () => {
    expect(isBytesString('50.047')).toBe(false);
    expect(isBytesString('1.234')).toBe(false);
  });
});

describe('escapeLabelValueInExactSelector', () => {
  it.each`
    value                      | escapedValue
    ${'nothing to escape'}     | ${'nothing to escape'}
    ${'escape quote: "'}       | ${'escape quote: \\"'}
    ${'escape newline: \nend'} | ${'escape newline: \\nend'}
    ${'escape slash: \\'}      | ${'escape slash: \\\\'}
  `('when called with $value', ({ value, escapedValue }) => {
    expect(escapeLabelValueInExactSelector(value)).toEqual(escapedValue);
  });
});

describe('unescapeLabelValueInExactSelector', () => {
  it.each`
    value                       | unescapedValue
    ${'nothing to unescape'}    | ${'nothing to unescape'}
    ${'escape quote: \\"'}      | ${'escape quote: "'}
    ${'escape newline: \\nend'} | ${'escape newline: \nend'}
    ${'escape slash: \\\\'}     | ${'escape slash: \\'}
  `('when called with $value', ({ value, unescapedValue }) => {
    expect(unescapeLabelValue(value)).toEqual(unescapedValue);
  });
});