tailwindcss/__tests__/plugins/boxShadow.test.js

import _ from 'lodash'
import escapeClassName from '../../src/util/escapeClassName'
import plugin from '../../src/plugins/boxShadow'

test('box shadow can use DEFAULT keyword and negative prefix syntax', () => {
  const addedUtilities = []

  const config = {
    theme: {
      boxShadow: {
        DEFAULT: '0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06)',
        md: '0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06)',
        '-': 'inset 0 2px 4px 0 rgba(0, 0, 0, 0.06)',
        '-md': '0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06)',
      },
    },
    variants: {
      boxShadow: ['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: {
        '.shadow': {
          'box-shadow': '0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06)',
        },
        '.shadow-md': {
          'box-shadow': '0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06)',
        },
        '.-shadow': {
          'box-shadow': 'inset 0 2px 4px 0 rgba(0, 0, 0, 0.06)',
        },
        '.-shadow-md': {
          'box-shadow': '0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06)',
        },
      },
      variants: ['responsive'],
    },
  ])
})