tailwindcss/tests/basic-usage.test.js

import fs from 'fs'
import path from 'path'

import { html, run, css, defaults } from './util/run'

test('basic usage', () => {
  let config = {
    content: [path.resolve(__dirname, './basic-usage.test.html')],
    corePlugins: { preflight: false },
  }

  let input = css`
    @tailwind base;
    @tailwind components;
    @tailwind utilities;
  `

  return run(input, config).then((result) => {
    let expectedPath = path.resolve(__dirname, './basic-usage.test.css')
    let expected = fs.readFileSync(expectedPath, 'utf8')

    expect(result.css).toMatchFormattedCss(expected)
  })
})

test('all plugins are executed that match a candidate', () => {
  let config = {
    content: [{ raw: html`<div class="bg-green-light bg-green"></div>` }],
    theme: {
      colors: {
        green: {
          light: 'green',
        },
      },
    },
    corePlugins: { preflight: false },
  }

  let input = css`
    @tailwind utilities;

    .bg-green {
      /* Empty on purpose */
    }
  `

  return run(input, config).then((result) => {
    expect(result.css).toMatchFormattedCss(css`
      .bg-green-light {
        --tw-bg-opacity: 1;
        background-color: rgb(0 128 0 / var(--tw-bg-opacity));
      }

      .bg-green {
        /* Empty on purpose */
      }
    `)
  })
})

test('per-plugin colors with the same key can differ when using a custom colors object', () => {
  let config = {
    content: [
      {
        raw: html`
          <div class="bg-theme text-theme">This should be green text on red background.</div>
        `,
      },
    ],
    theme: {
      // colors & theme MUST be plain objects
      // If they're functions here the test passes regardless
      colors: {
        theme: {
          bg: 'red',
          text: 'green',
        },
      },
      extend: {
        textColor: {
          theme: {
            DEFAULT: 'green',
          },
        },
        backgroundColor: {
          theme: {
            DEFAULT: 'red',
          },
        },
      },
    },
    corePlugins: { preflight: false },
  }

  let input = css`
    @tailwind utilities;
  `

  return run(input, config).then((result) => {
    expect(result.css).toMatchFormattedCss(css`
      .bg-theme {
        --tw-bg-opacity: 1;
        background-color: rgb(255 0 0 / var(--tw-bg-opacity));
      }
      .text-theme {
        --tw-text-opacity: 1;
        color: rgb(0 128 0 / var(--tw-text-opacity));
      }
    `)
  })
})

it('fasly config values still work', () => {
  let config = {
    content: [{ raw: html`<div class="inset-0"></div>` }],
    theme: {
      inset: {
        0: 0,
      },
    },
    plugins: [],
    corePlugins: { preflight: false },
  }

  let input = css`
    @tailwind utilities;
  `

  return run(input, config).then((result) => {
    expect(result.css).toMatchFormattedCss(css`
      .inset-0 {
        top: 0;
        right: 0;
        bottom: 0;
        left: 0;
      }
    `)
  })
})

it('shadows support values without a leading zero', () => {
  let config = {
    content: [{ raw: html`<div class="shadow-one shadow-two"></div>` }],
    theme: {
      boxShadow: {
        one: '0.5rem 0.5rem 0.5rem #0005',
        two: '.5rem .5rem .5rem #0005',
      },
    },
    plugins: [],
    corePlugins: { preflight: false },
  }

  let input = css`
    @tailwind utilities;
  `

  return run(input, config).then((result) => {
    expect(result.css).toMatchFormattedCss(css`
      .shadow-one {
        --tw-shadow: 0.5rem 0.5rem 0.5rem #0005;
        --tw-shadow-colored: 0.5rem 0.5rem 0.5rem var(--tw-shadow-color);
        box-shadow: var(--tw-ring-offset-shadow, 0 0 #0000), var(--tw-ring-shadow, 0 0 #0000),
          var(--tw-shadow);
      }
      .shadow-two {
        --tw-shadow: 0.5rem 0.5rem 0.5rem #0005;
        --tw-shadow-colored: 0.5rem 0.5rem 0.5rem var(--tw-shadow-color);
        box-shadow: var(--tw-ring-offset-shadow, 0 0 #0000), var(--tw-ring-shadow, 0 0 #0000),
          var(--tw-shadow);
      }
    `)
  })
})

it('can scan extremely long classes without crashing', () => {
  let val = 'cols-' + '-a'.repeat(65536)
  let config = {
    content: [{ raw: html`<div class="${val}"></div>` }],
    corePlugins: { preflight: false },
  }

  let input = css`
    @tailwind utilities;
  `

  return run(input, config).then((result) => {
    expect(result.css).toMatchFormattedCss(css``)
  })
})

it('does not produce duplicate output when seeing variants preceding a wildcard (*)', () => {
  let config = {
    content: [{ raw: html`underline focus:*` }],
    corePlugins: { preflight: false },
  }

  let input = css`
    @tailwind base;
    @tailwind components;
    @tailwind utilities;

    * {
      color: red;
    }

    .combined,
    * {
      text-align: center;
    }

    @layer base {
      * {
        color: blue;
      }

      .combined,
      * {
        color: red;
      }
    }
  `

  return run(input, config).then((result) => {
    expect(result.css).toMatchFormattedCss(css`
      * {
        color: blue;
      }

      .combined,
      * {
        color: red;
      }

      ${defaults}

      .underline {
        text-decoration-line: underline;
      }

      * {
        color: red;
      }

      .combined,
      * {
        text-align: center;
      }
    `)
  })
})