core/packages/compiler-sfc/__tests__/compileStyle.spec.ts

/**
 * @jest-environment node
 */

import {
  compileStyle,
  compileStyleAsync,
  SFCStyleCompileOptions
} from '../src/compileStyle'
import path from 'path'

describe('SFC scoped CSS', () => {
  function compileScoped(
    source: string,
    options?: Partial<SFCStyleCompileOptions>
  ): string {
    const res = compileStyle({
      source,
      filename: 'test.css',
      id: 'test',
      scoped: true,
      ...options
    })
    if (res.errors.length) {
      res.errors.forEach(err => {
        console.error(err)
      })
      expect(res.errors.length).toBe(0)
    }
    return res.code
  }

  test('simple selectors', () => {
    expect(compileScoped(`h1 { color: red; }`)).toMatch(
      `h1[test] { color: red;`
    )
    expect(compileScoped(`.foo { color: red; }`)).toMatch(
      `.foo[test] { color: red;`
    )
  })

  test('descendent selector', () => {
    expect(compileScoped(`h1 .foo { color: red; }`)).toMatch(
      `h1 .foo[test] { color: red;`
    )
  })

  test('multiple selectors', () => {
    expect(compileScoped(`h1 .foo, .bar, .baz { color: red; }`)).toMatch(
      `h1 .foo[test], .bar[test], .baz[test] { color: red;`
    )
  })

  test('pseudo class', () => {
    expect(compileScoped(`.foo:after { color: red; }`)).toMatch(
      `.foo[test]:after { color: red;`
    )
  })

  test('pseudo element', () => {
    expect(compileScoped(`::selection { display: none; }`)).toMatch(
      '[test]::selection {'
    )
  })

  test('spaces before pseudo element', () => {
    const code = compileScoped(`.abc, ::selection { color: red; }`)
    expect(code).toMatch('.abc[test],')
    expect(code).toMatch('[test]::selection {')
  })

  test('::v-deep', () => {
    expect(compileScoped(`:deep(.foo) { color: red; }`)).toMatchInlineSnapshot(`
      "[test] .foo { color: red;
      }"
    `)
    expect(compileScoped(`::v-deep(.foo) { color: red; }`))
      .toMatchInlineSnapshot(`
      "[test] .foo { color: red;
      }"
    `)
    expect(compileScoped(`::v-deep(.foo .bar) { color: red; }`))
      .toMatchInlineSnapshot(`
      "[test] .foo .bar { color: red;
      }"
    `)
    expect(compileScoped(`.baz .qux ::v-deep(.foo .bar) { color: red; }`))
      .toMatchInlineSnapshot(`
      ".baz .qux[test] .foo .bar { color: red;
      }"
    `)
  })

  test('::v-slotted', () => {
    expect(compileScoped(`:slotted(.foo) { color: red; }`))
      .toMatchInlineSnapshot(`
    ".foo[test-s] { color: red;
    }"
  `)
    expect(compileScoped(`::v-slotted(.foo) { color: red; }`))
      .toMatchInlineSnapshot(`
      ".foo[test-s] { color: red;
      }"
    `)
    expect(compileScoped(`::v-slotted(.foo .bar) { color: red; }`))
      .toMatchInlineSnapshot(`
      ".foo .bar[test-s] { color: red;
      }"
    `)
    expect(compileScoped(`.baz .qux ::v-slotted(.foo .bar) { color: red; }`))
      .toMatchInlineSnapshot(`
      ".baz .qux .foo .bar[test-s] { color: red;
      }"
    `)
  })

  test('::v-global', () => {
    expect(compileScoped(`:global(.foo) { color: red; }`))
      .toMatchInlineSnapshot(`
    ".foo { color: red;
    }"
  `)
    expect(compileScoped(`::v-global(.foo) { color: red; }`))
      .toMatchInlineSnapshot(`
      ".foo { color: red;
      }"
    `)
    expect(compileScoped(`::v-global(.foo .bar) { color: red; }`))
      .toMatchInlineSnapshot(`
      ".foo .bar { color: red;
      }"
    `)
    // global ignores anything before it
    expect(compileScoped(`.baz .qux ::v-global(.foo .bar) { color: red; }`))
      .toMatchInlineSnapshot(`
      ".foo .bar { color: red;
      }"
    `)
  })

  test('media query', () => {
    expect(compileScoped(`@media print { .foo { color: red }}`))
      .toMatchInlineSnapshot(`
      "@media print {
      .foo[test] { color: red
      }}"
    `)
  })

  test('supports query', () => {
    expect(compileScoped(`@supports(display: grid) { .foo { display: grid }}`))
      .toMatchInlineSnapshot(`
      "@supports(display: grid) {
      .foo[test] { display: grid
      }}"
    `)
  })

  test('scoped keyframes', () => {
    const style = compileScoped(
      `
.anim {
  animation: color 5s infinite, other 5s;
}
.anim-2 {
  animation-name: color;
  animation-duration: 5s;
}
.anim-3 {
  animation: 5s color infinite, 5s other;
}
.anim-multiple {
  animation: color 5s infinite, opacity 2s;
}
.anim-multiple-2 {
  animation-name: color, opacity;
  animation-duration: 5s, 2s;
}

@keyframes color {
  from { color: red; }
  to { color: green; }
}
@-webkit-keyframes color {
  from { color: red; }
  to { color: green; }
}
@keyframes opacity {
  from { opacity: 0; }
  to { opacity: 1; }
}
@-webkit-keyframes opacity {
  from { opacity: 0; }
  to { opacity: 1; }
}
    `,
      { id: 'data-v-test' }
    )

    expect(style).toContain(
      `.anim[data-v-test] {\n  animation: color-test 5s infinite, other 5s;`
    )
    expect(style).toContain(
      `.anim-2[data-v-test] {\n  animation-name: color-test`
    )
    expect(style).toContain(
      `.anim-3[data-v-test] {\n  animation: 5s color-test infinite, 5s other;`
    )
    expect(style).toContain(`@keyframes color-test {`)
    expect(style).toContain(`@-webkit-keyframes color-test {`)

    expect(style).toContain(
      `.anim-multiple[data-v-test] {\n  animation: color-test 5s infinite,opacity-test 2s;`
    )
    expect(style).toContain(
      `.anim-multiple-2[data-v-test] {\n  animation-name: color-test,opacity-test;`
    )
    expect(style).toContain(`@keyframes opacity-test {`)
    expect(style).toContain(`@-webkit-keyframes opacity-test {`)
  })

  // vue-loader/#1370
  test('spaces after selector', () => {
    expect(compileScoped(`.foo , .bar { color: red; }`)).toMatchInlineSnapshot(`
      ".foo[test], .bar[test] { color: red;
      }"
    `)
  })

  describe('deprecated syntax', () => {
    test('::v-deep as combinator', () => {
      expect(compileScoped(`::v-deep .foo { color: red; }`))
        .toMatchInlineSnapshot(`
        "[test] .foo { color: red;
        }"
      `)
      expect(compileScoped(`.bar ::v-deep .foo { color: red; }`))
        .toMatchInlineSnapshot(`
        ".bar[test] .foo { color: red;
        }"
      `)
      expect(
        `::v-deep usage as a combinator has been deprecated.`
      ).toHaveBeenWarned()
    })

    test('>>> (deprecated syntax)', () => {
      const code = compileScoped(`>>> .foo { color: red; }`)
      expect(code).toMatchInlineSnapshot(`
        "[test] .foo { color: red;
        }"
      `)
      expect(
        `the >>> and /deep/ combinators have been deprecated.`
      ).toHaveBeenWarned()
    })

    test('/deep/ (deprecated syntax)', () => {
      const code = compileScoped(`/deep/ .foo { color: red; }`)
      expect(code).toMatchInlineSnapshot(`
        "[test] .foo { color: red;
        }"
      `)
      expect(
        `the >>> and /deep/ combinators have been deprecated.`
      ).toHaveBeenWarned()
    })
  })

  describe('<style vars>', () => {
    test('should rewrite CSS vars in scoped mode', () => {
      const code = compileScoped(
        `.foo {
        color: var(--color);
        font-size: var(--global:font);
      }`,
        {
          id: 'data-v-test',
          vars: true
        }
      )
      expect(code).toMatchInlineSnapshot(`
        ".foo[data-v-test] {
                color: var(--test-color);
                font-size: var(--font);
        }"
      `)
    })
  })
})

describe('SFC CSS modules', () => {
  test('should include resulting classes object in result', async () => {
    const result = await compileStyleAsync({
      source: `.red { color: red }\n.green { color: green }\n:global(.blue) { color: blue }`,
      filename: `test.css`,
      id: 'test',
      modules: true
    })
    expect(result.modules).toBeDefined()
    expect(result.modules!.red).toMatch('_red_')
    expect(result.modules!.green).toMatch('_green_')
    expect(result.modules!.blue).toBeUndefined()
  })

  test('postcss-modules options', async () => {
    const result = await compileStyleAsync({
      source: `:local(.foo-bar) { color: red }\n.baz-qux { color: green }`,
      filename: `test.css`,
      id: 'test',
      modules: true,
      modulesOptions: {
        scopeBehaviour: 'global',
        generateScopedName: `[name]__[local]__[hash:base64:5]`,
        localsConvention: 'camelCaseOnly'
      }
    })
    expect(result.modules).toBeDefined()
    expect(result.modules!.fooBar).toMatch('__foo-bar__')
    expect(result.modules!.bazQux).toBeUndefined()
  })
})

describe('SFC style preprocessors', () => {
  test('scss @import', () => {
    const res = compileStyle({
      source: `
        @import "./import.scss";
      `,
      filename: path.resolve(__dirname, './fixture/test.scss'),
      id: '',
      preprocessLang: 'scss'
    })

    expect([...res.dependencies]).toStrictEqual([
      path.join(__dirname, './fixture/import.scss')
    ])
  })

  test('scss respect user-defined string options.additionalData', () => {
    const res = compileStyle({
      preprocessOptions: {
        additionalData: `
          @mixin square($size) {
            width: $size;
            height: $size;
          }`
      },
      source: `
        .square {
          @include square(100px);
        }
      `,
      filename: path.resolve(__dirname, './fixture/test.scss'),
      id: '',
      preprocessLang: 'scss'
    })

    expect(res.errors.length).toBe(0)
  })

  test('scss respect user-defined function options.additionalData', () => {
    const source = `
        .square {
          @include square(100px);
        }
      `
    const filename = path.resolve(__dirname, './fixture/test.scss')
    const res = compileStyle({
      preprocessOptions: {
        additionalData: (s: string, f: string) => {
          expect(s).toBe(source)
          expect(f).toBe(filename)
          return `
          @mixin square($size) {
            width: $size;
            height: $size;
          }`
        }
      },
      source,
      filename,
      id: '',
      preprocessLang: 'scss'
    })

    expect(res.errors.length).toBe(0)
  })
})