arbitrary-variants.test.js

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

test('basic arbitrary variants', () => {
  let config = {
    content: [{ raw: html`<div class="[&>*]:underline"></div>` }],
    corePlugins: { preflight: false },
  }

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

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

      .\[\&\>\*\]\:underline > * {
        text-decoration-line: underline;
      }
    `)
  })
})

test('spaces in selector (using _)', () => {
  let config = {
    content: [
      {
        raw: html`<div class="[.a.b_&]:underline"></div>`,
      },
    ],
    corePlugins: { preflight: false },
  }

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

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

      .a.b .\[\.a\.b_\&\]\:underline {
        text-decoration-line: underline;
      }
    `)
  })
})

test('arbitrary variants with modifiers', () => {
  let config = {
    content: [{ raw: html`<div class="dark:lg:hover:[&>*]:underline"></div>` }],
    corePlugins: { preflight: false },
  }

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

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

      @media (prefers-color-scheme: dark) {
        @media (min-width: 1024px) {
          .dark\:lg\:hover\:\[\&\>\*\]\:underline > *:hover {
            text-decoration-line: underline;
          }
        }
      }
    `)
  })
})

test('variants without & or an at-rule are ignored', () => {
  let config = {
    content: [
      {
        raw: html`
          <div class="[div]:underline"></div>
          <div class="[:hover]:underline"></div>
          <div class="[wtf-bbq]:underline"></div>
          <div class="[lol]:hover:underline"></div>
        `,
      },
    ],
    corePlugins: { preflight: false },
  }

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

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

test('arbitrary variants are sorted after other variants', () => {
  let config = {
    content: [{ raw: html`<div class="underline lg:underline [&>*]:underline"></div>` }],
    corePlugins: { preflight: false },
  }

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

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

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

      @media (min-width: 1024px) {
        .lg\:underline {
          text-decoration-line: underline;
        }
      }

      .\[\&\>\*\]\:underline > * {
        text-decoration-line: underline;
      }
    `)
  })
})

test('using the important modifier', () => {
  let config = {
    content: [{ raw: html`<div class="[&>*]:!underline"></div>` }],
    corePlugins: { preflight: false },
  }

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

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

      .\[\&\>\*\]\:\!underline > * {
        text-decoration-line: underline !important;
      }
    `)
  })
})

test('at-rules', () => {
  let config = {
    content: [{ raw: html`<div class="[@supports(what:ever)]:underline"></div>` }],
    corePlugins: { preflight: false },
  }

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

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

      @supports (what: ever) {
        .\[\@supports\(what\:ever\)\]\:underline {
          text-decoration-line: underline;
        }
      }
    `)
  })
})

test('nested at-rules', () => {
  let config = {
    content: [
      {
        raw: html`<div class="[@media_screen{@media(hover:hover)}]:underline"></div>`,
      },
    ],
    corePlugins: { preflight: false },
  }

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

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

      @media screen {
        @media (hover: hover) {
          .\[\@media_screen\{\@media\(hover\:hover\)\}\]\:underline {
            text-decoration-line: underline;
          }
        }
      }
    `)
  })
})

test('at-rules with selector modifications', () => {
  let config = {
    content: [{ raw: html`<div class="[@media(hover:hover){&:hover}]:underline"></div>` }],
    corePlugins: { preflight: false },
  }

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

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

      @media (hover: hover) {
        .\[\@media\(hover\:hover\)\{\&\:hover\}\]\:underline:hover {
          text-decoration-line: underline;
        }
      }
    `)
  })
})

test('nested at-rules with selector modifications', () => {
  let config = {
    content: [
      {
        raw: html`<div class="[@media_screen{@media(hover:hover){&:hover}}]:underline"></div>`,
      },
    ],
    corePlugins: { preflight: false },
  }

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

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

      @media screen {
        @media (hover: hover) {
          .\[\@media_screen\{\@media\(hover\:hover\)\{\&\:hover\}\}\]\:underline:hover {
            text-decoration-line: underline;
          }
        }
      }
    `)
  })
})

test('attribute selectors', () => {
  let config = {
    content: [{ raw: html`<div class="[&[data-open]]:underline"></div>` }],
    corePlugins: { preflight: false },
  }

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

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

      .\[\&\[data-open\]\]\:underline[data-open] {
        text-decoration-line: underline;
      }
    `)
  })
})

test('multiple attribute selectors', () => {
  let config = {
    content: [{ raw: html`<div class="[&[data-foo][data-bar]:not([data-baz])]:underline"></div>` }],
    corePlugins: { preflight: false },
  }

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

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

      .\[\&\[data-foo\]\[data-bar\]\:not\(\[data-baz\]\)\]\:underline[data-foo][data-bar]:not([data-baz]) {
        text-decoration-line: underline;
      }
    `)
  })
})

test('multiple attribute selectors with custom separator (1)', () => {
  let config = {
    separator: '__',
    content: [
      { raw: html`<div class="[&[data-foo][data-bar]:not([data-baz])]__underline"></div>` },
    ],
    corePlugins: { preflight: false },
  }

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

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

      .\[\&\[data-foo\]\[data-bar\]\:not\(\[data-baz\]\)\]__underline[data-foo][data-bar]:not([data-baz]) {
        text-decoration-line: underline;
      }
    `)
  })
})

test('multiple attribute selectors with custom separator (2)', () => {
  let config = {
    separator: '_@',
    content: [
      { raw: html`<div class="[&[data-foo][data-bar]:not([data-baz])]_@underline"></div>` },
    ],
    corePlugins: { preflight: false },
  }

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

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

      .\[\&\[data-foo\]\[data-bar\]\:not\(\[data-baz\]\)\]_\@underline[data-foo][data-bar]:not([data-baz]) {
        text-decoration-line: underline;
      }
    `)
  })
})

test('with @apply', () => {
  let config = {
    content: [
      {
        raw: html`<div class="foo"></div>`,
      },
    ],
    corePlugins: { preflight: false },
  }

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

    .foo {
      @apply [@media_screen{@media(hover:hover){&:hover}}]:underline;
    }
  `

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

      @media screen {
        @media (hover: hover) {
          .foo:hover {
            text-decoration-line: underline;
          }
        }
      }
    `)
  })
})

test('keeps escaped underscores', () => {
  let config = {
    content: [
      {
        raw: '<div class="[&_.foo\\_\\_bar]:underline"></div>',
      },
    ],
    corePlugins: { preflight: false },
  }

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

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

      .\[\&_\.foo\\_\\_bar\]\:underline .foo__bar {
        text-decoration-line: underline;
      }
    `)
  })
})

test('keeps escaped underscores with multiple arbitrary variants', () => {
  let config = {
    content: [
      {
        raw: '<div class="[&_.foo\\_\\_bar]:[&_.bar\\_\\_baz]:underline"></div>',
      },
    ],
    corePlugins: { preflight: false },
  }

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

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

      .\[\&_\.foo\\_\\_bar\]\:\[\&_\.bar\\_\\_baz\]\:underline .bar__baz .foo__bar {
        text-decoration-line: underline;
      }
    `)
  })
})

test('keeps escaped underscores in arbitrary variants mixed with normal variants', () => {
  let config = {
    content: [
      {
        raw: `
          <div class="[&_.foo\\_\\_bar]:hover:underline"></div>
          <div class="hover:[&_.foo\\_\\_bar]:underline"></div>
        `,
      },
    ],
    corePlugins: { preflight: false },
  }

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

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

      .\[\&_\.foo\\_\\_bar\]\:hover\:underline:hover .foo__bar {
        text-decoration-line: underline;
      }

      .hover\:\[\&_\.foo\\_\\_bar\]\:underline .foo__bar:hover {
        text-decoration-line: underline;
      }
    `)
  })
})

test('allows attribute variants with quotes', () => {
  let config = {
    content: [
      {
        raw: `
          <div class="[&[data-test='2']]:underline"></div>
          <div class='[&[data-test="2"]]:underline'></div>
        `,
      },
    ],
    corePlugins: { preflight: false },
  }

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

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

      .\[\&\[data-test\=\'2\'\]\]\:underline[data-test="2"] {
        text-decoration-line: underline;
      }

      .\[\&\[data-test\=\"2\"\]\]\:underline[data-test='2'] {
        text-decoration-line: underline;
      }
    `)
  })
})

test('classes in arbitrary variants should not be prefixed', () => {
  let config = {
    prefix: 'tw-',
    content: [
      {
        raw: `
          <div class="[.foo_&]:tw-text-red-400">should not be red</div>
          <div class="foo">
            <div class="[.foo_&]:tw-text-red-400">should be red</div>
          </div>
          <div class="[&_.foo]:tw-text-red-400">
            <div>should not be red</div>
            <div class="foo">should be red</div>
          </div>
        `,
      },
    ],
    corePlugins: { preflight: false },
  }

  let input = `
    @tailwind utilities;
  `

  return run(input, config).then((result) => {
    expect(result.css).toMatchFormattedCss(css`
      .foo .\[\.foo_\&\]\:tw-text-red-400 {
        --tw-text-opacity: 1;
        color: rgb(248 113 113 / var(--tw-text-opacity));
      }

      .\[\&_\.foo\]\:tw-text-red-400 .foo {
        --tw-text-opacity: 1;
        color: rgb(248 113 113 / var(--tw-text-opacity));
      }
    `)
  })
})

test('classes in the same arbitrary variant should not be prefixed', () => {
  let config = {
    prefix: 'tw-',
    content: [
      {
        raw: `
          <div class="[.foo_&]:tw-text-red-400 [.foo_&]:tw-bg-white">should not be red</div>
          <div class="foo">
            <div class="[.foo_&]:tw-text-red-400 [.foo_&]:tw-bg-white">should be red</div>
          </div>
          <div class="[&_.foo]:tw-text-red-400 [&_.foo]:tw-bg-white">
            <div>should not be red</div>
            <div class="foo">should be red</div>
          </div>
        `,
      },
    ],
    corePlugins: { preflight: false },
  }

  let input = `
    @tailwind utilities;
  `

  return run(input, config).then((result) => {
    expect(result.css).toMatchFormattedCss(css`
      .foo .\[\.foo_\&\]\:tw-bg-white {
        --tw-bg-opacity: 1;
        background-color: rgb(255 255 255 / var(--tw-bg-opacity));
      }

      .foo .\[\.foo_\&\]\:tw-text-red-400 {
        --tw-text-opacity: 1;
        color: rgb(248 113 113 / var(--tw-text-opacity));
      }

      .\[\&_\.foo\]\:tw-bg-white .foo {
        --tw-bg-opacity: 1;
        background-color: rgb(255 255 255 / var(--tw-bg-opacity));
      }

      .\[\&_\.foo\]\:tw-text-red-400 .foo {
        --tw-text-opacity: 1;
        color: rgb(248 113 113 / var(--tw-text-opacity));
      }
    `)
  })
})

it('should support aria variants', () => {
  let config = {
    content: [
      {
        raw: html`
          <div>
            <div class="aria-checked:underline"></div>
            <div class="aria-[sort=ascending]:underline"></div>
            <div class="aria-[labelledby=a_b]:underline"></div>
            <div class="group-aria-checked:underline"></div>
            <div class="peer-aria-checked:underline"></div>
            <div class="group-aria-checked/foo:underline"></div>
            <div class="peer-aria-checked/foo:underline"></div>
            <div class="group-aria-[sort=ascending]:underline"></div>
            <div class="peer-aria-[sort=ascending]:underline"></div>
            <div class="group-aria-[labelledby=a_b]:underline"></div>
            <div class="peer-aria-[labelledby=a_b]:underline"></div>
            <div class="group-aria-[sort=ascending]/foo:underline"></div>
            <div class="peer-aria-[sort=ascending]/foo:underline"></div>
          </div>
        `,
      },
    ],
    corePlugins: { preflight: false },
  }

  let input = css`
    @tailwind utilities;
  `

  return run(input, config).then((result) => {
    expect(result.css).toMatchFormattedCss(css`
      .aria-checked\:underline[aria-checked='true'] {
        text-decoration-line: underline;
      }
      .aria-\[sort\=ascending\]\:underline[aria-sort='ascending'] {
        text-decoration-line: underline;
      }
      .aria-\[labelledby\=a_b\]\:underline[aria-labelledby='a b'] {
        text-decoration-line: underline;
      }
      .group[aria-checked='true'] .group-aria-checked\:underline {
        text-decoration-line: underline;
      }
      .group\/foo[aria-checked='true'] .group-aria-checked\/foo\:underline {
        text-decoration-line: underline;
      }
      .group[aria-sort='ascending'] .group-aria-\[sort\=ascending\]\:underline {
        text-decoration-line: underline;
      }
      .group[aria-labelledby='a b'] .group-aria-\[labelledby\=a_b\]\:underline {
        text-decoration-line: underline;
      }
      .group\/foo[aria-sort='ascending'] .group-aria-\[sort\=ascending\]\/foo\:underline {
        text-decoration-line: underline;
      }
      .peer[aria-checked='true'] ~ .peer-aria-checked\:underline {
        text-decoration-line: underline;
      }
      .peer\/foo[aria-checked='true'] ~ .peer-aria-checked\/foo\:underline {
        text-decoration-line: underline;
      }
      .peer[aria-sort='ascending'] ~ .peer-aria-\[sort\=ascending\]\:underline {
        text-decoration-line: underline;
      }
      .peer[aria-labelledby='a b'] ~ .peer-aria-\[labelledby\=a_b\]\:underline {
        text-decoration-line: underline;
      }
      .peer\/foo[aria-sort='ascending'] ~ .peer-aria-\[sort\=ascending\]\/foo\:underline {
        text-decoration-line: underline;
      }
    `)
  })
})

it('should support data variants', () => {
  let config = {
    theme: {
      data: {
        checked: 'ui~="checked"',
      },
    },
    content: [
      {
        raw: html`
          <div>
            <div class="data-checked:underline"></div>
            <div class="data-[position=top]:underline"></div>
            <div class="data-[foo=bar_baz]:underline"></div>
            <div class="group-data-checked:underline"></div>
            <div class="peer-data-checked:underline"></div>
            <div class="group-data-checked/foo:underline"></div>
            <div class="peer-data-checked/foo:underline"></div>
            <div class="group-data-[position=top]:underline"></div>
            <div class="peer-data-[position=top]:underline"></div>
            <div class="group-data-[foo=bar_baz]:underline"></div>
            <div class="peer-data-[foo=bar_baz]:underline"></div>
            <div class="group-data-[position=top]/foo:underline"></div>
            <div class="peer-data-[position=top]/foo:underline"></div>
          </div>
        `,
      },
    ],
    corePlugins: { preflight: false },
  }

  let input = css`
    @tailwind utilities;
  `

  return run(input, config).then((result) => {
    expect(result.css).toMatchFormattedCss(css`
      .data-checked\:underline[data-ui~='checked'] {
        text-decoration-line: underline;
      }
      .data-\[position\=top\]\:underline[data-position='top'] {
        text-decoration-line: underline;
      }
      .data-\[foo\=bar_baz\]\:underline[data-foo='bar baz'] {
        text-decoration-line: underline;
      }
      .group[data-ui~='checked'] .group-data-checked\:underline {
        text-decoration-line: underline;
      }
      .group\/foo[data-ui~='checked'] .group-data-checked\/foo\:underline {
        text-decoration-line: underline;
      }
      .group[data-position='top'] .group-data-\[position\=top\]\:underline {
        text-decoration-line: underline;
      }
      .group[data-foo='bar baz'] .group-data-\[foo\=bar_baz\]\:underline {
        text-decoration-line: underline;
      }
      .group\/foo[data-position='top'] .group-data-\[position\=top\]\/foo\:underline {
        text-decoration-line: underline;
      }
      .peer[data-ui~='checked'] ~ .peer-data-checked\:underline {
        text-decoration-line: underline;
      }
      .peer\/foo[data-ui~='checked'] ~ .peer-data-checked\/foo\:underline {
        text-decoration-line: underline;
      }
      .peer[data-position='top'] ~ .peer-data-\[position\=top\]\:underline {
        text-decoration-line: underline;
      }
      .peer[data-foo='bar baz'] ~ .peer-data-\[foo\=bar_baz\]\:underline {
        text-decoration-line: underline;
      }
      .peer\/foo[data-position='top'] ~ .peer-data-\[position\=top\]\/foo\:underline {
        text-decoration-line: underline;
      }
    `)
  })
})

it('should support supports', () => {
  let config = {
    theme: {
      supports: {
        grid: 'display: grid',
      },
    },
    content: [
      {
        raw: html`
          <div>
            <!-- Property check -->
            <div class="supports-[display:grid]:grid"></div>
            <!-- Value with spaces, needs to be normalized -->
            <div class="supports-[transform-origin:5%_5%]:underline"></div>
            <!-- Selectors (raw) -->
            <div class="supports-[selector(A>B)]:underline"></div>
            <!-- 'not' check (raw) -->
            <div class="supports-[not(foo:bar)]:underline"></div>
            <!-- 'or' check (raw) -->
            <div class="supports-[(foo:bar)or(bar:baz)]:underline"></div>
            <!-- 'and' check (raw) -->
            <div class="supports-[(foo:bar)and(bar:baz)]:underline"></div>
            <!-- No value give for the property, defaulting to prop: var(--tw) -->
            <div class="supports-[container-type]:underline"></div>
            <!-- Named supports usage -->
            <div class="supports-grid:underline"></div>
          </div>
        `,
      },
    ],
    corePlugins: { preflight: false },
  }

  let input = css`
    @tailwind utilities;
  `

  return run(input, config).then((result) => {
    expect(result.css).toMatchFormattedCss(css`
      @supports (display: grid) {
        .supports-grid\:underline {
          text-decoration-line: underline;
        }
      }

      @supports (display: grid) {
        .supports-\[display\:grid\]\:grid {
          display: grid;
        }
      }

      @supports (transform-origin: 5% 5%) {
        .supports-\[transform-origin\:5\%_5\%\]\:underline {
          text-decoration-line: underline;
        }
      }

      @supports selector(A > B) {
        .supports-\[selector\(A\>B\)\]\:underline {
          text-decoration-line: underline;
        }
      }

      @supports not (foo: bar) {
        .supports-\[not\(foo\:bar\)\]\:underline {
          text-decoration-line: underline;
        }
      }

      @supports (foo: bar) or (bar: baz) {
        .supports-\[\(foo\:bar\)or\(bar\:baz\)\]\:underline {
          text-decoration-line: underline;
        }
      }

      @supports (foo: bar) and (bar: baz) {
        .supports-\[\(foo\:bar\)and\(bar\:baz\)\]\:underline {
          text-decoration-line: underline;
        }
      }

      @supports (container-type: var(--tw)) {
        .supports-\[container-type\]\:underline {
          text-decoration-line: underline;
        }
      }
    `)
  })
})

it('should be possible to use modifiers and arbitrary groups', () => {
  let config = {
    content: [
      {
        raw: html`
          <div>
            <div class="group">
              <!-- Default group usage -->
              <div class="group-hover:underline"></div>

              <!-- Arbitrary variants with pseudo class for group -->
              <!-- With & -->
              <div class="group-[&:focus]:underline"></div>
              <!-- Without & -->
              <div class="group-[:hover]:underline"></div>

              <!-- Arbitrary variants with attributes selectors for group -->
              <!-- With & -->
              <div class="group-[&[data-open]]:underline"></div>
              <!-- Without & -->
              <div class="group-[[data-open]]:underline"></div>

              <!-- Arbitrary variants with other selectors -->
              <!-- With & -->
              <div class="group-[.in-foo_&]:underline"></div>
              <!-- Without & -->
              <div class="group-[.in-foo]:underline"></div>
            </div>

            <!-- The same as above, but with modifiers -->
            <div class="group/foo">
              <div class="group-hover/foo:underline"></div>

              <div class="group-[&:focus]/foo:underline"></div>
              <div class="group-[:hover]/foo:underline"></div>

              <div class="group-[&[data-open]]/foo:underline"></div>
              <div class="group-[[data-open]]/foo:underline"></div>

              <div class="group-[.in-foo_&]/foo:underline"></div>
              <div class="group-[.in-foo]/foo:underline"></div>
            </div>
          </div>
        `,
      },
    ],
    corePlugins: { preflight: false },
  }

  let input = css`
    @tailwind utilities;
  `

  return run(input, config).then((result) => {
    expect(result.css).toMatchFormattedCss(css`
      .group:hover .group-hover\:underline {
        text-decoration-line: underline;
      }
      .group\/foo:hover .group-hover\/foo\:underline {
        text-decoration-line: underline;
      }
      .group:focus .group-\[\&\:focus\]\:underline {
        text-decoration-line: underline;
      }
      .group:hover .group-\[\:hover\]\:underline {
        text-decoration-line: underline;
      }
      .group[data-open] .group-\[\&\[data-open\]\]\:underline {
        text-decoration-line: underline;
      }
      .group[data-open] .group-\[\[data-open\]\]\:underline {
        text-decoration-line: underline;
      }
      .in-foo .group .group-\[\.in-foo_\&\]\:underline {
        text-decoration-line: underline;
      }
      .group.in-foo .group-\[\.in-foo\]\:underline {
        text-decoration-line: underline;
      }
      .group\/foo:focus .group-\[\&\:focus\]\/foo\:underline {
        text-decoration-line: underline;
      }
      .group\/foo:hover .group-\[\:hover\]\/foo\:underline {
        text-decoration-line: underline;
      }
      .group\/foo[data-open] .group-\[\&\[data-open\]\]\/foo\:underline {
        text-decoration-line: underline;
      }
      .group\/foo[data-open] .group-\[\[data-open\]\]\/foo\:underline {
        text-decoration-line: underline;
      }
      .in-foo .group\/foo .group-\[\.in-foo_\&\]\/foo\:underline {
        text-decoration-line: underline;
      }
      .group\/foo.in-foo .group-\[\.in-foo\]\/foo\:underline {
        text-decoration-line: underline;
      }
    `)
  })
})

it('should be possible to use modifiers and arbitrary peers', () => {
  let config = {
    content: [
      {
        raw: html`
          <div>
            <div class="peer"></div>

            <!-- Default peer usage -->
            <div class="peer-hover:underline"></div>

            <!-- Arbitrary variants with pseudo class for peer -->
            <!-- With & -->
            <div class="peer-[&:focus]:underline"></div>
            <!-- Without & -->
            <div class="peer-[:hover]:underline"></div>

            <!-- Arbitrary variants with attributes selectors for peer -->
            <!-- With & -->
            <div class="peer-[&[data-open]]:underline"></div>
            <!-- Without & -->
            <div class="peer-[[data-open]]:underline"></div>

            <!-- Arbitrary variants with other selectors -->
            <!-- With & -->
            <div class="peer-[.in-foo_&]:underline"></div>
            <!-- Without & -->
            <div class="peer-[.in-foo]:underline"></div>

            <!-- The same as above, but with modifiers -->
            <div class="peer/foo"></div>

            <div class="peer-hover/foo:underline"></div>

            <div class="peer-[&:focus]/foo:underline"></div>
            <div class="peer-[:hover]/foo:underline"></div>

            <div class="peer-[&[data-open]]/foo:underline"></div>
            <div class="peer-[[data-open]]/foo:underline"></div>

            <div class="peer-[.in-foo_&]/foo:underline"></div>
            <div class="peer-[.in-foo]/foo:underline"></div>
          </div>
        `,
      },
    ],
    corePlugins: { preflight: false },
  }

  let input = css`
    @tailwind utilities;
  `

  return run(input, config).then((result) => {
    expect(result.css).toMatchFormattedCss(css`
      .peer:hover ~ .peer-hover\:underline {
        text-decoration-line: underline;
      }
      .peer\/foo:hover ~ .peer-hover\/foo\:underline {
        text-decoration-line: underline;
      }
      .peer:focus ~ .peer-\[\&\:focus\]\:underline {
        text-decoration-line: underline;
      }
      .peer:hover ~ .peer-\[\:hover\]\:underline {
        text-decoration-line: underline;
      }
      .peer[data-open] ~ .peer-\[\&\[data-open\]\]\:underline {
        text-decoration-line: underline;
      }
      .peer[data-open] ~ .peer-\[\[data-open\]\]\:underline {
        text-decoration-line: underline;
      }
      .in-foo .peer ~ .peer-\[\.in-foo_\&\]\:underline {
        text-decoration-line: underline;
      }
      .peer.in-foo ~ .peer-\[\.in-foo\]\:underline {
        text-decoration-line: underline;
      }
      .peer\/foo:focus ~ .peer-\[\&\:focus\]\/foo\:underline {
        text-decoration-line: underline;
      }
      .peer\/foo:hover ~ .peer-\[\:hover\]\/foo\:underline {
        text-decoration-line: underline;
      }
      .peer\/foo[data-open] ~ .peer-\[\&\[data-open\]\]\/foo\:underline {
        text-decoration-line: underline;
      }
      .peer\/foo[data-open] ~ .peer-\[\[data-open\]\]\/foo\:underline {
        text-decoration-line: underline;
      }
      .in-foo .peer\/foo ~ .peer-\[\.in-foo_\&\]\/foo\:underline {
        text-decoration-line: underline;
      }
      .peer\/foo.in-foo ~ .peer-\[\.in-foo\]\/foo\:underline {
        text-decoration-line: underline;
      }
    `)
  })
})