swc/crates/swc_ecma_transforms_module/tests/path_node.rs

use std::path::{Path, PathBuf};

use indexmap::IndexMap;
use swc_common::FileName;
use swc_ecma_loader::resolvers::{node::NodeModulesResolver, tsc::TsConfigResolver};
use swc_ecma_parser::Syntax;
use swc_ecma_transforms_module::{
    path::{ImportResolver, NodeImportResolver},
    rewriter::import_rewriter,
};
use swc_ecma_transforms_testing::test_fixture;
use testing::run_test2;

type TestProvider = NodeImportResolver<NodeModulesResolver>;

#[test]
fn node_modules() {
    let provider = TestProvider::default();

    run_test2(false, |cm, _| {
        let fm = cm.new_source_file(FileName::Real("foo".into()), "".into());

        let resolved = provider
            .resolve_import(&fm.name, "core-js")
            .expect("should success");

        assert_eq!(&*resolved, "core-js");

        Ok(())
    })
    .unwrap();
}

type JscPathsProvider = NodeImportResolver<TsConfigResolver<NodeModulesResolver>>;

fn paths_resolver(
    base_url: impl AsRef<Path>,
    rules: Vec<(String, Vec<String>)>,
) -> JscPathsProvider {
    NodeImportResolver::new(TsConfigResolver::new(
        NodeModulesResolver::new(swc_ecma_loader::TargetEnv::Node, Default::default(), true),
        base_url.as_ref().to_path_buf(),
        rules,
    ))
}

#[testing::fixture("tests/paths/**/input")]
fn fixture(input_dir: PathBuf) {
    let output_dir = input_dir.parent().unwrap().join("output");

    let index_path = input_dir.join("index.ts");

    test_fixture(
        Syntax::default(),
        &|_| {
            let paths_json_path = input_dir.join("paths.json");
            let paths_json = std::fs::read_to_string(&paths_json_path).unwrap();
            let paths = serde_json::from_str::<IndexMap<String, Vec<String>>>(&paths_json).unwrap();

            let rules = paths.into_iter().collect();

            let resolver = paths_resolver(&input_dir, rules);

            import_rewriter(FileName::Real(index_path.clone()), resolver)
        },
        &index_path,
        &output_dir.join("index.ts"),
    );
}