text: import _ from 'lodash'
  import escapeClassName from '../../src/util/escapeClassName'
  import plugin from '../../src/plugins/letterSpacing'
  
  test('letter spacing can use negative prefix syntax', () => {
    const addedUtilities = []
  
    const config = {
      theme: {
        letterSpacing: {
          '-1': '-0.025em',
          '1': '0.025em',
        },
      },
      variants: {
        letterSpacing: ['responsive'],
      },
    }
  
    const getConfigValue = (path, defaultValue) => _.get(config, path, defaultValue)
    const pluginApi = {
      config: getConfigValue,
      e: escapeClassName,
      theme: (path, defaultValue) => getConfigValue(`theme.${path}`, defaultValue),
      variants: (path, defaultValue) => {
        if (_.isArray(config.variants)) {
          return config.variants
        }
  
        return getConfigValue(`variants.${path}`, defaultValue)
      },
      addUtilities(utilities, variants) {
        addedUtilities.push({
          utilities,
          variants,
        })
      },
    }
  
    plugin()(pluginApi)
  
    expect(addedUtilities).toEqual([
      {
        utilities: [
          {
            '.-tracking-1': { letterSpacing: '-0.025em' },
            '.tracking-1': { letterSpacing: '0.025em' },
          },
        ],
        variants: ['responsive'],
      },
    ])
  })
  