tailwindcss/tests/variants.test.js

import fs from 'fs'
import path from 'path'
import postcss from 'postcss'
import { crosscheck, run, html, css, defaults } from './util/run'

crosscheck(({ stable, oxide }) => {
  test('variants', () => {
    let config = {
      darkMode: 'selector',
      content: [path.resolve(__dirname, './variants.test.html')],
      corePlugins: { preflight: false },
    }

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

    return run(input, config).then((result) => {
      stable
        .expect(result.css)
        .toMatchFormattedCss(
          fs.readFileSync(path.resolve(__dirname, './variants.test.css'), 'utf8')
        )
      oxide
        .expect(result.css)
        .toMatchFormattedCss(
          fs.readFileSync(path.resolve(__dirname, './variants.oxide.test.css'), 'utf8')
        )
    })
  })

  test('order matters and produces different behaviour', () => {
    let config = {
      content: [
        {
          raw: html`
            <div class="hover:file:[--value:1]"></div>
            <div class="file:hover:[--value:2]"></div>
          `,
        },
      ],
    }

    return run('@tailwind utilities', config).then((result) => {
      stable.expect(result.css).toMatchFormattedCss(css`
        .hover\:file\:\[--value\:1\]::-webkit-file-upload-button:hover {
          --value: 1;
        }
        .hover\:file\:\[--value\:1\]::file-selector-button:hover {
          --value: 1;
        }
        .file\:hover\:\[--value\:2\]:hover::-webkit-file-upload-button {
          --value: 2;
        }
        .file\:hover\:\[--value\:2\]:hover::file-selector-button {
          --value: 2;
        }
      `)
      oxide.expect(result.css).toMatchFormattedCss(css`
        .hover\:file\:\[--value\:1\]::-webkit-file-upload-button:hover {
          --value: 1;
        }
        .hover\:file\:\[--value\:1\]::file-selector-button:hover {
          --value: 1;
        }
        .file\:hover\:\[--value\:2\]:hover::-webkit-file-upload-button {
          --value: 2;
        }
        .file\:hover\:\[--value\:2\]:hover::file-selector-button {
          --value: 2;
        }
      `)
    })
  })

  describe('custom advanced variants', () => {
    test('at-rules without params', () => {
      let config = {
        content: [
          {
            raw: html` <div class="ogre:text-center"></div> `,
          },
        ],
        plugins: [
          function ({ addVariant }) {
            addVariant('ogre', '@layer')
          },
        ],
      }

      return run('@tailwind components; @tailwind utilities', config).then((result) => {
        return expect(result.css).toMatchFormattedCss(css`
          @layer {
            .ogre\:text-center {
              text-align: center;
            }
          }
        `)
      })
    })

    test('prose-headings usage on its own', () => {
      let config = {
        content: [
          {
            raw: html` <div class="prose-headings:text-center"></div> `,
          },
        ],
        plugins: [
          function ({ addVariant }) {
            addVariant('prose-headings', ':where(&) :is(h1, h2, h3, h4)')
          },
        ],
      }

      return run('@tailwind components;@tailwind utilities', config).then((result) => {
        return expect(result.css).toMatchFormattedCss(css`
          :where(.prose-headings\:text-center) :is(h1, h2, h3, h4) {
            text-align: center;
          }
        `)
      })
    })

    test('prose-headings with another "simple" variant', () => {
      let config = {
        content: [
          {
            raw: html`
              <div class="hover:prose-headings:text-center"></div>
              <div class="prose-headings:hover:text-center"></div>
            `,
          },
        ],
        plugins: [
          function ({ addVariant }) {
            addVariant('prose-headings', ':where(&) :is(h1, h2, h3, h4)')
          },
        ],
      }

      return run('@tailwind components;@tailwind utilities', config).then((result) => {
        return expect(result.css).toMatchFormattedCss(css`
          :where(.hover\:prose-headings\:text-center) :is(h1, h2, h3, h4):hover,
          :where(.prose-headings\:hover\:text-center:hover) :is(h1, h2, h3, h4) {
            text-align: center;
          }
        `)
      })
    })

    test('prose-headings with another "complex" variant', () => {
      let config = {
        content: [
          {
            raw: html`
              <div class="group-hover:prose-headings:text-center"></div>
              <div class="prose-headings:group-hover:text-center"></div>
            `,
          },
        ],
        plugins: [
          function ({ addVariant }) {
            addVariant('prose-headings', ':where(&) :is(h1, h2, h3, h4)')
          },
        ],
      }

      return run('@tailwind utilities', config).then((result) => {
        return expect(result.css).toMatchFormattedCss(css`
          .group:hover :where(.group-hover\:prose-headings\:text-center) :is(h1, h2, h3, h4),
          :where(.group:hover .prose-headings\:group-hover\:text-center) :is(h1, h2, h3, h4) {
            text-align: center;
          }
        `)
      })
    })

    test('using variants with multi-class selectors', () => {
      let config = {
        content: [
          {
            raw: html` <div class="screen:parent screen:child"></div> `,
          },
        ],
        plugins: [
          function ({ addVariant, addComponents }) {
            addComponents({
              '.parent .child': {
                foo: 'bar',
              },
            })
            addVariant('screen', '@media screen')
          },
        ],
      }

      return run('@tailwind components;@tailwind utilities', config).then((result) => {
        return expect(result.css).toMatchFormattedCss(css`
          @media screen {
            .screen\:parent .child,
            .parent .screen\:child {
              foo: bar;
            }
          }
        `)
      })
    })

    test('using multiple classNames in your custom variant', () => {
      let config = {
        content: [
          {
            raw: html` <div class="my-variant:underline test"></div> `,
          },
        ],
        plugins: [
          function ({ addVariant }) {
            addVariant('my-variant', '&:where(.one, .two, .three)')
          },
        ],
      }

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

        @layer components {
          .test {
            @apply my-variant:italic;
          }
        }
      `

      return run(input, config).then((result) => {
        return expect(result.css).toMatchFormattedCss(css`
          .test:where(.one, .two, .three) {
            font-style: italic;
          }
          .my-variant\:underline:where(.one, .two, .three) {
            text-decoration-line: underline;
          }
        `)
      })
    })

    test('variant format string must include at-rule or & (1)', async () => {
      let config = {
        content: [
          {
            raw: html` <div class="wtf-bbq:text-center"></div> `,
          },
        ],
        plugins: [
          function ({ addVariant }) {
            addVariant('wtf-bbq', 'lol')
          },
        ],
      }

      await expect(run('@tailwind components;@tailwind utilities', config)).rejects.toThrowError(
        "Your custom variant `wtf-bbq` has an invalid format string. Make sure it's an at-rule or contains a `&` placeholder."
      )
    })

    test('variant format string must include at-rule or & (2)', async () => {
      let config = {
        content: [
          {
            raw: html` <div class="wtf-bbq:text-center"></div> `,
          },
        ],
        plugins: [
          function ({ addVariant }) {
            addVariant('wtf-bbq', () => 'lol')
          },
        ],
      }

      await expect(run('@tailwind components;@tailwind utilities', config)).rejects.toThrowError(
        "Your custom variant `wtf-bbq` has an invalid format string. Make sure it's an at-rule or contains a `&` placeholder."
      )
    })
  })

  test('stacked peer variants', async () => {
    let config = {
      content: [{ raw: 'peer-disabled:peer-focus:peer-hover:border-blue-500' }],
      corePlugins: { preflight: false },
    }

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

    let result = await run(input, config)
    stable.expect(result.css).toIncludeCss(css`
      .peer:disabled:focus:hover ~ .peer-disabled\:peer-focus\:peer-hover\:border-blue-500 {
        --tw-border-opacity: 1;
        border-color: rgb(59 130 246 / var(--tw-border-opacity));
      }
    `)
    oxide.expect(result.css).toIncludeCss(css`
      .peer:disabled:focus:hover ~ .peer-disabled\:peer-focus\:peer-hover\:border-blue-500 {
        border-color: #3b82f6;
      }
    `)
  })

  it('should properly handle keyframes with multiple variants', async () => {
    let config = {
      content: [
        {
          raw: 'animate-spin hover:animate-spin focus:animate-spin hover:animate-bounce focus:animate-bounce',
        },
      ],
    }

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

    let result = await run(input, config)
    expect(result.css).toMatchFormattedCss(css`
      @keyframes spin {
        to {
          transform: rotate(360deg);
        }
      }
      .animate-spin {
        animation: 1s linear infinite spin;
      }
      @keyframes bounce {
        0%,
        100% {
          animation-timing-function: cubic-bezier(0.8, 0, 1, 1);
          transform: translateY(-25%);
        }
        50% {
          animation-timing-function: cubic-bezier(0, 0, 0.2, 1);
          transform: none;
        }
      }
      .hover\:animate-bounce:hover {
        animation: 1s infinite bounce;
      }
      .hover\:animate-spin:hover {
        animation: 1s linear infinite spin;
      }
      .focus\:animate-bounce:focus {
        animation: 1s infinite bounce;
      }
      .focus\:animate-spin:focus {
        animation: 1s linear infinite spin;
      }
    `)
  })

  test('custom addVariant with more complex media query params', () => {
    let config = {
      content: [
        {
          raw: html` <div class="magic:text-center"></div> `,
        },
      ],
      plugins: [
        function ({ addVariant }) {
          addVariant('magic', '@media screen and (max-width: 600px)')
        },
      ],
    }

    return run('@tailwind components;@tailwind utilities', config).then((result) => {
      return expect(result.css).toMatchFormattedCss(css`
        @media screen and (max-width: 600px) {
          .magic\:text-center {
            text-align: center;
          }
        }
      `)
    })
  })

  test('custom addVariant with nested media & format shorthand', () => {
    let config = {
      content: [
        {
          raw: html` <div class="magic:text-center"></div> `,
        },
      ],
      plugins: [
        function ({ addVariant }) {
          addVariant('magic', '@supports (hover: hover) { @media print { &:disabled } }')
        },
      ],
    }

    return run('@tailwind components;@tailwind utilities', config).then((result) => {
      return expect(result.css).toMatchFormattedCss(css`
        @supports (hover: hover) {
          @media print {
            .magic\:text-center:disabled {
              text-align: center;
            }
          }
        }
      `)
    })
  })

  test('before and after variants are a bit special, and forced to the end', () => {
    let config = {
      content: [
        {
          raw: html`
            <div class="before:hover:text-center"></div>
            <div class="hover:before:text-center"></div>
          `,
        },
      ],
      plugins: [],
    }

    return run('@tailwind components;@tailwind utilities', config).then((result) => {
      return expect(result.css).toMatchFormattedCss(css`
        .before\:hover\:text-center:hover:before,
        .hover\:before\:text-center:hover:before {
          content: var(--tw-content);
          text-align: center;
        }
      `)
    })
  })

  test('before and after variants are a bit special, and forced to the end (2)', () => {
    let config = {
      content: [
        {
          raw: html`
            <div class="before:prose-headings:text-center"></div>
            <div class="prose-headings:before:text-center"></div>
          `,
        },
      ],
      plugins: [
        function ({ addVariant }) {
          addVariant('prose-headings', ':where(&) :is(h1, h2, h3, h4)')
        },
      ],
    }

    return run('@tailwind components;@tailwind utilities', config).then((result) => {
      return expect(result.css).toMatchFormattedCss(css`
        :where(.before\:prose-headings\:text-center) :is(h1, h2, h3, h4):before,
        :where(.prose-headings\:before\:text-center) :is(h1, h2, h3, h4):before {
          content: var(--tw-content);
          text-align: center;
        }
      `)
    })
  })

  test('returning non-strings and non-selectors in addVariant', () => {
    /** @type {import('../types/config').Config} */
    let config = {
      content: [
        {
          raw: html`
            <div class="peer-aria-expanded:text-center"></div>
            <div class="peer-aria-expanded-2:text-center"></div>
          `,
        },
      ],
      plugins: [
        function ({ addVariant, e }) {
          addVariant('peer-aria-expanded', ({ modifySelectors, separator }) =>
            // Returning anything other string | string[] | undefined here is not supported
            // But we're trying to be lenient here and just throw it out
            modifySelectors(
              ({ className }) =>
                `.peer[aria-expanded="true"] ~ .${e(`peer-aria-expanded${separator}${className}`)}`
            )
          )

          addVariant('peer-aria-expanded-2', ({ modifySelectors, separator }) => {
            let nodes = modifySelectors(
              ({ className }) => `.${e(`peer-aria-expanded-2${separator}${className}`)}`
            )

            return [
              // Returning anything other than strings here is not supported
              // But we're trying to be lenient here and just throw it out
              nodes,
              '.peer[aria-expanded="false"] ~ &',
            ]
          })
        },
      ],
    }

    return run('@tailwind components;@tailwind utilities', config).then((result) => {
      return expect(result.css).toMatchFormattedCss(css`
        .peer[aria-expanded='true'] ~ .peer-aria-expanded\:text-center,
        .peer[aria-expanded='false'] ~ .peer-aria-expanded-2\:text-center {
          text-align: center;
        }
      `)
    })
  })

  it('should not generate variants of user css if it is not inside a layer', () => {
    let config = {
      content: [{ raw: html`<div class="hover:foo"></div>` }],
      plugins: [],
    }

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

      .foo {
        color: red;
      }
    `

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

  it('should be possible to use responsive modifiers that are defined with special characters', () => {
    let config = {
      content: [{ raw: html`<div class="<sm:underline"></div>` }],
      theme: {
        screens: {
          '<sm': { max: '399px' },
        },
      },
      plugins: [],
    }

    return run('@tailwind utilities', config).then((result) => {
      return expect(result.css).toMatchFormattedCss(css`
        @media (max-width: 399px) {
          .\<sm\:underline {
            text-decoration-line: underline;
          }
        }
      `)
    })
  })

  it('including just the base layer should not produce variants', () => {
    let config = {
      content: [{ raw: html`<div class="sm:container sm:underline"></div>` }],
      corePlugins: { preflight: false },
    }

    return run('@tailwind base', config).then((result) => {
      return expect(result.css).toMatchFormattedCss(
        css`
          ${defaults}
        `
      )
    })
  })

  it('variants for components should not be produced in a file without a components layer', () => {
    let config = {
      content: [{ raw: html`<div class="sm:container sm:underline"></div>` }],
    }

    return run('@tailwind utilities', config).then((result) => {
      return expect(result.css).toMatchFormattedCss(css`
        @media (min-width: 640px) {
          .sm\:underline {
            text-decoration-line: underline;
          }
        }
      `)
    })
  })

  it('variants for utilities should not be produced in a file without a utilities layer', () => {
    let config = {
      content: [{ raw: html`<div class="sm:container sm:underline"></div>` }],
    }

    return run('@tailwind components', config).then((result) => {
      return expect(result.css).toMatchFormattedCss(css`
        @media (min-width: 640px) {
          .sm\:container {
            width: 100%;
          }
          @media (min-width: 640px) {
            .sm\:container {
              max-width: 640px;
            }
          }
          @media (min-width: 768px) {
            .sm\:container {
              max-width: 768px;
            }
          }
          @media (min-width: 1024px) {
            .sm\:container {
              max-width: 1024px;
            }
          }
          @media (min-width: 1280px) {
            .sm\:container {
              max-width: 1280px;
            }
          }
          @media (min-width: 1536px) {
            .sm\:container {
              max-width: 1536px;
            }
          }
        }
      `)
    })
  })

  test('The visited variant removes opacity support', () => {
    let config = {
      content: [
        {
          raw: html`
            <a class="visited:border-red-500 visited:bg-red-500 visited:text-red-500"
              >Look, it's a link!</a
            >
          `,
        },
      ],
      plugins: [],
    }

    return run('@tailwind utilities', config).then((result) => {
      return expect(result.css).toMatchFormattedCss(css`
        .visited\:border-red-500:visited {
          border-color: #ef4444;
        }
        .visited\:bg-red-500:visited {
          background-color: #ef4444;
        }
        .visited\:text-red-500:visited {
          color: #ef4444;
        }
      `)
    })
  })

  it('appends variants to the correct place when using postcss documents', () => {
    let config = {
      content: [{ raw: html`<div class="underline sm:underline"></div>` }],
      plugins: [],
      corePlugins: { preflight: false },
    }

    const doc = postcss.document()
    doc.append(postcss.parse(`a {}`))
    doc.append(postcss.parse(`@tailwind base`))
    doc.append(postcss.parse(`@tailwind utilities`))
    doc.append(postcss.parse(`b {}`))

    const result = doc.toResult()

    return run(result, config).then((result) => {
      return expect(result.css).toMatchFormattedCss(css`
        ${defaults}
        .underline {
          text-decoration-line: underline;
        }
        @media (min-width: 640px) {
          .sm\:underline {
            text-decoration-line: underline;
          }
        }
      `)
    })
  })

  it('variants support multiple, grouped selectors (html)', () => {
    let config = {
      content: [{ raw: html`<div class="sm:base1 sm:base2"></div>` }],
      plugins: [],
      corePlugins: { preflight: false },
    }

    let input = css`
      @tailwind utilities;
      @layer utilities {
        .base1 .foo,
        .base1 .bar {
          color: red;
        }

        .base2 .bar .base2-foo {
          color: red;
        }
      }
    `

    return run(input, config).then((result) => {
      return expect(result.css).toMatchFormattedCss(css`
        @media (min-width: 640px) {
          .sm\:base1 .foo,
          .sm\:base1 .bar,
          .sm\:base2 .bar .base2-foo {
            color: red;
          }
        }
      `)
    })
  })

  it('variants support multiple, grouped selectors (apply)', () => {
    let config = {
      content: [{ raw: html`<div class="baz"></div>` }],
      plugins: [],
      corePlugins: { preflight: false },
    }

    let input = css`
      @tailwind utilities;
      @layer utilities {
        .base .foo,
        .base .bar {
          color: red;
        }
      }
      .baz {
        @apply sm:base;
      }
    `

    return run(input, config).then((result) => {
      return expect(result.css).toMatchFormattedCss(css`
        @media (min-width: 640px) {
          .baz .foo,
          .baz .bar {
            color: red;
          }
        }
      `)
    })
  })

  it('variants only picks the used selectors in a group (html)', () => {
    let config = {
      content: [{ raw: html`<div class="sm:b"></div>` }],
      plugins: [],
      corePlugins: { preflight: false },
    }

    let input = css`
      @tailwind utilities;
      @layer utilities {
        .a,
        .b {
          color: red;
        }
      }
    `

    return run(input, config).then((result) => {
      return expect(result.css).toMatchFormattedCss(css`
        @media (min-width: 640px) {
          .sm\:b {
            color: red;
          }
        }
      `)
    })
  })

  it('variants only picks the used selectors in a group (apply)', () => {
    let config = {
      content: [{ raw: html`<div class="baz"></div>` }],
      plugins: [],
      corePlugins: { preflight: false },
    }

    let input = css`
      @tailwind utilities;
      @layer utilities {
        .a,
        .b {
          color: red;
        }
      }
      .baz {
        @apply sm:b;
      }
    `

    return run(input, config).then((result) => {
      return expect(result.css).toMatchFormattedCss(css`
        @media (min-width: 640px) {
          .baz {
            color: red;
          }
        }
      `)
    })
  })

  test('hoverOnlyWhenSupported adds hover and pointer media features by default', () => {
    let config = {
      future: {
        hoverOnlyWhenSupported: true,
      },
      content: [
        {
          raw: html`<div class="hover:underline group-hover:underline peer-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) and (pointer: fine) {
          .hover\:underline:hover,
          .group:hover .group-hover\:underline,
          .peer:hover ~ .peer-hover\:underline {
            text-decoration-line: underline;
          }
        }
      `)
    })
  })

  test('multi-class utilities handle selector-mutating variants correctly', () => {
    let config = {
      content: [
        {
          raw: html`<div
            class="after:foo after:bar after:baz hover:foo hover:bar hover:baz group-hover:foo group-hover:bar group-hover:baz peer-checked:foo peer-checked:bar peer-checked:baz"
          ></div>`,
        },
        {
          raw: html`<div
            class="after:foo1 after:bar1 after:baz1 hover:foo1 hover:bar1 hover:baz1 group-hover:foo1 group-hover:bar1 group-hover:baz1 peer-checked:foo1 peer-checked:bar1 peer-checked:baz1"
          ></div>`,
        },
      ],
      corePlugins: { preflight: false },
    }

    let input = css`
      @tailwind utilities;
      @layer utilities {
        .foo.bar.baz {
          color: red;
        }
        .foo1 .bar1 .baz1 {
          color: red;
        }
      }
    `

    // The second set of ::after cases (w/ descendant selectors)
    // are clearly "wrong" BUT you can't have a descendant of a
    // pseudo - element so the utilities `after:foo1` and
    // `after:bar1` are non-sensical so this is still
    // perfectly fine behavior

    return run(input, config).then((result) => {
      expect(result.css).toMatchFormattedCss(css`
        .after\:foo.bar.baz:after,
        .after\:bar.foo.baz:after,
        .after\:baz.foo.bar:after,
        .after\:foo1 .bar1 .baz1:after,
        .foo1 .after\:bar1 .baz1:after,
        .foo1 .bar1 .after\:baz1:after {
          content: var(--tw-content);
          color: red;
        }
        .hover\:foo:hover.bar.baz,
        .hover\:bar:hover.foo.baz,
        .hover\:baz:hover.foo.bar,
        .hover\:foo1:hover .bar1 .baz1,
        .foo1 .hover\:bar1:hover .baz1,
        .foo1 .bar1 .hover\:baz1:hover,
        .group:hover .group-hover\:foo.bar.baz,
        .group:hover .group-hover\:bar.foo.baz,
        .group:hover .group-hover\:baz.foo.bar,
        .group:hover .group-hover\:foo1 .bar1 .baz1,
        .foo1 .group:hover .group-hover\:bar1 .baz1,
        .foo1 .bar1 .group:hover .group-hover\:baz1,
        .peer:checked ~ .peer-checked\:foo.bar.baz,
        .peer:checked ~ .peer-checked\:bar.foo.baz,
        .peer:checked ~ .peer-checked\:baz.foo.bar,
        .peer:checked ~ .peer-checked\:foo1 .bar1 .baz1,
        .foo1 .peer:checked ~ .peer-checked\:bar1 .baz1,
        .foo1 .bar1 .peer:checked ~ .peer-checked\:baz1 {
          color: red;
        }
      `)
    })
  })

  test('class inside pseudo-class function :has', () => {
    let config = {
      content: [
        { raw: html`<div class="foo hover:foo sm:foo"></div>` },
        { raw: html`<div class="bar hover:bar sm:bar"></div>` },
        { raw: html`<div class="baz hover:baz sm:baz"></div>` },
      ],
      corePlugins: { preflight: false },
    }

    let input = css`
      @tailwind utilities;
      @layer utilities {
        :where(.foo) {
          color: red;
        }
        :is(.foo, .bar, .baz) {
          color: orange;
        }
        :is(.foo) {
          color: yellow;
        }
        html:has(.foo) {
          color: green;
        }
      }
    `

    return run(input, config).then((result) => {
      expect(result.css).toMatchFormattedCss(css`
        :where(.foo) {
          color: red;
        }
        :is(.foo, .bar, .baz) {
          color: orange;
        }
        .foo {
          color: #ff0;
        }
        html:has(.foo) {
          color: green;
        }
        :where(.hover\:foo:hover) {
          color: red;
        }
        :is(.hover\:foo:hover, .bar, .baz),
        :is(.foo, .hover\:bar:hover, .baz),
        :is(.foo, .bar, .hover\:baz:hover) {
          color: orange;
        }
        .hover\:foo:hover {
          color: #ff0;
        }
        html:has(.hover\:foo:hover) {
          color: green;
        }
        @media (min-width: 640px) {
          :where(.sm\:foo) {
            color: red;
          }
          :is(.sm\:foo, .bar, .baz),
          :is(.foo, .sm\:bar, .baz),
          :is(.foo, .bar, .sm\:baz) {
            color: orange;
          }
          .sm\:foo {
            color: #ff0;
          }
          html:has(.sm\:foo) {
            color: green;
          }
        }
      `)
    })
  })

  test('variant functions returning arrays should output correct results when nesting', async () => {
    let config = {
      content: [{ raw: html`<div class="test:foo" />` }],
      corePlugins: { preflight: false },
      plugins: [
        function ({ addUtilities, addVariant }) {
          addVariant('test', () => ['@media (test)'])
          addUtilities({
            '.foo': {
              display: 'grid',
              '> *': {
                'grid-column': 'span 2',
              },
            },
          })
        },
      ],
    }

    let input = css`
      @tailwind utilities;
    `

    let result = await run(input, config)

    expect(result.css).toMatchFormattedCss(css`
      @media (test) {
        .test\:foo {
          display: grid;
        }
        .test\:foo > * {
          grid-column: span 2;
        }
      }
    `)
  })

  test('variants with slashes in them work', () => {
    let config = {
      content: [
        {
          raw: html` <div class="ar-1/10:text-red-500">ar-1/10</div> `,
        },
      ],
      theme: {
        extend: {
          screens: {
            'ar-1/10': { raw: '(min-aspect-ratio: 1/10)' },
          },
        },
      },
      corePlugins: { preflight: false },
    }

    let input = css`
      @tailwind utilities;
    `

    return run(input, config).then((result) => {
      stable.expect(result.css).toMatchFormattedCss(css`
        @media (min-aspect-ratio: 1 / 10) {
          .ar-1\/10\:text-red-500 {
            --tw-text-opacity: 1;
            color: rgb(239 68 68 / var(--tw-text-opacity));
          }
        }
      `)
      oxide.expect(result.css).toMatchFormattedCss(css`
        @media (min-aspect-ratio: 1 / 10) {
          .ar-1\/10\:text-red-500 {
            color: #ef4444;
          }
        }
      `)
    })
  })

  test('variants with slashes support modifiers', () => {
    let config = {
      content: [
        {
          raw: html` <div class="ar-1/10/20:text-red-500">ar-1/10</div> `,
        },
      ],
      corePlugins: { preflight: false },
      plugins: [
        function ({ matchVariant }) {
          matchVariant(
            'ar',
            (value, { modifier }) => {
              return [`@media (min-aspect-ratio: ${value}) and (foo: ${modifier})`]
            },
            { values: { '1/10': '1/10' } }
          )
        },
      ],
    }

    let input = css`
      @tailwind utilities;
    `

    return run(input, config).then((result) => {
      stable.expect(result.css).toMatchFormattedCss(css`
        @media (min-aspect-ratio: 1 / 10) and (foo: 20) {
          .ar-1\/10\/20\:text-red-500 {
            --tw-text-opacity: 1;
            color: rgb(239 68 68 / var(--tw-text-opacity));
          }
        }
      `)
      oxide.expect(result.css).toMatchFormattedCss(css`
        @media (min-aspect-ratio: 1 / 10) and (foo: 20) {
          .ar-1\/10\/20\:text-red-500 {
            color: #ef4444;
          }
        }
      `)
    })
  })

  test('arbitrary variant selectors should not re-order scrollbar pseudo classes', async () => {
    let config = {
      content: [
        {
          raw: html`
            <div class="[&::-webkit-scrollbar:hover]:underline" />
            <div class="[&::-webkit-scrollbar-button:hover]:underline" />
            <div class="[&::-webkit-scrollbar-thumb:hover]:underline" />
            <div class="[&::-webkit-scrollbar-track:hover]:underline" />
            <div class="[&::-webkit-scrollbar-track-piece:hover]:underline" />
            <div class="[&::-webkit-scrollbar-corner:hover]:underline" />
            <div class="[&::-webkit-resizer:hover]:underline" />
          `,
        },
      ],
      corePlugins: { preflight: false },
    }

    let input = css`
      @tailwind utilities;
    `

    let result = await run(input, config)

    expect(result.css).toMatchFormattedCss(css`
      .\[\&\:\:-webkit-resizer\:hover\]\:underline::-webkit-resizer:hover {
        text-decoration-line: underline;
      }
      .\[\&\:\:-webkit-scrollbar-button\:hover\]\:underline::-webkit-scrollbar-button:hover {
        text-decoration-line: underline;
      }
      .\[\&\:\:-webkit-scrollbar-corner\:hover\]\:underline::-webkit-scrollbar-corner:hover {
        text-decoration-line: underline;
      }
      .\[\&\:\:-webkit-scrollbar-thumb\:hover\]\:underline::-webkit-scrollbar-thumb:hover {
        text-decoration-line: underline;
      }
      .\[\&\:\:-webkit-scrollbar-track-piece\:hover\]\:underline::-webkit-scrollbar-track-piece:hover {
        text-decoration-line: underline;
      }
      .\[\&\:\:-webkit-scrollbar-track\:hover\]\:underline::-webkit-scrollbar-track:hover {
        text-decoration-line: underline;
      }
      .\[\&\:\:-webkit-scrollbar\:hover\]\:underline::-webkit-scrollbar:hover {
        text-decoration-line: underline;
      }
    `)
  })

  test('stacking dark and rtl variants', async () => {
    let config = {
      darkMode: 'selector',
      content: [
        {
          raw: html`<div class="dark:rtl:italic" />`,
        },
      ],
      corePlugins: { preflight: false },
    }

    let input = css`
      @tailwind utilities;
    `

    let result = await run(input, config)

    expect(result.css).toMatchFormattedCss(css`
      .dark\:rtl\:italic:where([dir='rtl'], [dir='rtl'] *):where(.dark, .dark *) {
        font-style: italic;
      }
    `)
  })

  test('stacking dark and rtl variants with pseudo elements', async () => {
    let config = {
      darkMode: 'selector',
      content: [
        {
          raw: html`<div class="dark:rtl:placeholder:italic" />`,
        },
      ],
      corePlugins: { preflight: false },
    }

    let input = css`
      @tailwind utilities;
    `

    let result = await run(input, config)

    expect(result.css).toMatchFormattedCss(css`
      .dark\:rtl\:placeholder\:italic:where([dir='rtl'], [dir='rtl'] *):where(
          .dark,
          .dark *
        )::placeholder {
        font-style: italic;
      }
    `)
  })

  test('* is matched by the parser as the children variant', async () => {
    let config = {
      content: [
        {
          raw: html`
            <div class="*:italic" />
            <div class="*:hover:italic" />
            <div class="hover:*:italic" />
            <div class="data-[slot=label]:*:hover:italic" />
            <div class="[&_p]:*:hover:italic" />
          `,
        },
      ],
      corePlugins: { preflight: false },
    }

    let input = css`
      @tailwind utilities;
    `

    let result = await run(input, config)

    expect(result.css).toMatchFormattedCss(css`
      .\*\:italic > *,
      .\*\:hover\:italic:hover > *,
      .hover\:\*\:italic > :hover,
      .data-\[slot\=label\]\:\*\:hover\:italic:hover > [data-slot='label'],
      .\[\&_p\]\:\*\:hover\:italic:hover > * p {
        font-style: italic;
      }
    `)
  })
})