prettier/tests/css_case/case.scss

// Convention in this test file:
// - The case should be preserved for things prefixed with "Keep".
// - The case should always be preserved for function names and property keywords.
// - Other things should mostly be lowercase.

@IMPORT Keep;

HTML#KeepId.KeepClass,
a[HREF=KeepAttrValue]:HOVER::FIRST-letter,
:Not(:NTH-child(2N+1)) {
    COLOR: #AAbbCC;
    BACKGROUND-image: URL("KeepString");
    Margin: 5PX .2E10Em;
    --Keep-custom-Prop: red;
    background: Var(--Keep-custom-Prop);
    animation-name: KeepAnimationName;
    important: something !IMPORTANT;
}

@keyframes KeepAnimationName {
  FROM {
    prop: val;
  }

  #{$KeepInterpolationVar},
  #{$Keep + 15PX},
  #{$Keep + $Keep15PX} {
    prop: val;
  }

  TO {
    prop: val;
  }
}

@custom-media --KeepCustomMedia screen and (width >= 768px);
@media (--KeepCustomMedia) {}

@FUNCTION KeepFuncName() {
    @RETURN 12;
}

$KeepTopLevelVar: val;
@KeepLessVar: val;

@MIXIN KeepMixinName($Keep: 15IN, $Keep: $Keep15IN, $Keep: Keep-1E-2Em) {
    $KeepVar: KeepFuncName();
    #{$KeepInterpolationVar}: val;
    #{$Keep + 15PX}: val;
    #{$Keep + $Keep15PX}: val;
    @KeepLessVar: val;

    #{$Keep}[#{$Keep}][#{Keep}^=#{Keep-1A}]:#{$Keep} {
      prop: val;
    }

    &Keep & NoKeep {
      prop: val;
    }

    BACKGROUND: {
      COLOR: RED;
    }

    BACKGROUND: Keep 15PX Keep15PX {
      COLOR: RED;
    }

    #{$Keep + 15PX + Keep15PX + '15PX' + "15PX"}: {
      COLOR: RED;
    }
}

@Mixin Keep($Keep: $Keep15IN, $Keep: Keepå1E1) {}

@MEDIA (MIN-WIDTH: 700PX) {
    @include Keep;
    @include Keep(.12e+01cH);
    @include Keep($Keep12E01cH);
}

@MEDIA (#{$Keep}: #{$Keep}) {}