oxc/crates/oxc_minifier/tests/mod.rs

mod closure;
mod esbuild;
mod oxc;
mod tdewolff;
mod terser;

use oxc_allocator::Allocator;
use oxc_codegen::{Codegen, CodegenOptions};
use oxc_minifier::{CompressOptions, Minifier, MinifierOptions};
use oxc_parser::Parser;
use oxc_span::SourceType;

pub(crate) fn minify(
    source_text: &str,
    source_type: SourceType,
    options: MinifierOptions,
) -> String {
    let allocator = Allocator::default();
    let program = Parser::new(&allocator, source_text, source_type).parse().program;
    let program = allocator.alloc(program);
    Minifier::new(options).build(&allocator, program);
    Codegen::<true>::new(source_text.len(), CodegenOptions).build(program)
}

pub(crate) fn test(source_text: &str, expected: &str) {
    let options = MinifierOptions { mangle: false, ..MinifierOptions::default() };
    test_with_options(source_text, expected, options);
}

pub(crate) fn test_with_options(source_text: &str, expected: &str, options: MinifierOptions) {
    let source_type = SourceType::default();
    let minified = minify(source_text, source_type, options);
    assert_eq!(expected, minified, "for source {source_text}");
}

pub(crate) fn test_same(source_text: &str) {
    test(source_text, source_text);
}

pub(crate) fn test_reparse(source_text: &str) {
    let source_type = SourceType::default();
    let options = MinifierOptions { mangle: false, ..MinifierOptions::default() };
    let minified = minify(source_text, source_type, options);
    let minified2 = minify(&minified, source_type, options);
    assert_eq!(minified, minified2, "for source {source_text}");
}

pub(crate) fn test_without_compress_booleans(source_text: &str, expected: &str) {
    let source_type = SourceType::default();
    let compress_options = CompressOptions { booleans: false, ..CompressOptions::default() };
    let options = MinifierOptions { mangle: false, compress: compress_options };
    let minified = minify(source_text, source_type, options);
    assert_eq!(expected, minified, "for source {source_text}");
}

pub(crate) fn test_snapshot<S>(name: &str, sources: S)
where
    S: IntoIterator<Item = &'static str>,
{
    let source_type = SourceType::default();
    let options = MinifierOptions { mangle: false, ..MinifierOptions::default() };
    let snapshot: String = sources
        .into_iter()
        .map(|source| {
            let minified = minify(source, source_type, options);
            format!(
                "==================================== SOURCE ====================================
{source}

=================================== MINIFIED ===================================
{minified}

"
            )
        })
        .fold(String::new(), |mut acc, snapshot| {
            acc.push_str(snapshot.as_str());
            acc
        });
    insta::with_settings!({ prepend_module_to_snapshot => false }, {

        insta::assert_snapshot!(name, snapshot);
    });
}