rsass 0.29.2

Sass implementation in pure rust (not complete yet)
Documentation 
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//! Tests auto-converted from "sass-spec/spec/core_functions/string/unique_id.hrx"

fn runner() -> crate::TestRunner {
    super::runner().with_cwd("unique_id")
}

mod error {
    use super::runner;

    #[test]
    fn too_many_args() {
        assert_eq!(
            runner().err(
                "@use \"sass:string\";\
             \na {b: string.unique-id(c)}\n"
            ),
            "Error: Only 0 arguments allowed, but 1 was passed.\
         \n  ,--> input.scss\
         \n2 | a {b: string.unique-id(c)}\
         \n  |       ^^^^^^^^^^^^^^^^^^^ invocation\
         \n  \'\
         \n  ,--> sass:string\
         \n1 | @function unique-id() {\
         \n  |           =========== declaration\
         \n  \'\
         \n  input.scss 2:7  root stylesheet",
        );
    }
}
#[test]
fn is_identifier() {
    assert_eq!(
        runner().ok(
            "@use \"sass:selector\";\
             \n@use \"sass:string\";\
             \n// Every call to unique-id() should return a valid CSS identifier. We can\'t test\
             \n// this directly, so we make sure it can parse as a class selector with\
             \n// selector-parse().\
             \n@for $i from 1 to 1000 {\
             \n  $_: selector.parse(\".#{string.unique-id()}\");\
             \n}\n"
        ),
        ""
    );
}
#[test]
fn is_unique() {
    assert_eq!(
        runner().ok(
            "@use \"sass:map\";\
             \n@use \"sass:string\";\
             \n// As the name suggests, every call to unique-id() should return a different\
             \n// value.\
             \n$ids: ();\
             \n@for $i from 1 to 1000 {\
             \n  $id: string.unique-id();\
             \n  @if map.has-key($ids, $id) {\
             \n    @error \"#{$id} generated more than once\";\
             \n  }\n\
             \n  $ids: map.merge($ids, ($id: null));\
             \n}\n"
        ),
        ""
    );
}