Generated by SassMeister.com.

input.scss

.root {
    .container {
        .child {
            color: red;
            
            .test &::before {
                content: 'Expected Selector: .test .root .container .child::before';
            }
        }
    }
}  

output.css

.root .container .child {
  color: red;
}
.test .root .container .child::before {
  content: "Expected Selector: .test .root .container .child::before";
}

settings.json

{
  "sass": {
    "compiler": "dart-sass/1.26.11",
    "extensions": {},
    "syntax": "SCSS",
    "outputStyle": "expanded"
  },
  "autoprefixer": false
}