bun.sh/test/bundler/bundler_compile_splitting.test.ts

import { describe } from "bun:test";
import { itBundled } from "./expectBundled";

describe("bundler", () => {
  describe("compile with splitting", () => {
    itBundled("compile/splitting/RelativePathsAcrossChunks", {
      compile: true,
      splitting: true,
      backend: "cli",
      files: {
        "/src/app/entry.ts": /* js */ `
          console.log('app entry');
          import('../components/header').then(m => m.render());
        `,
        "/src/components/header.ts": /* js */ `
          export async function render() {
            console.log('header rendering');
            const nav = await import('./nav/menu');
            nav.show();
          }
        `,
        "/src/components/nav/menu.ts": /* js */ `
          export async function show() {
            console.log('menu showing');
            const items = await import('./items');
            console.log('items:', items.list);
          }
        `,
        "/src/components/nav/items.ts": /* js */ `
          export const list = ['home', 'about', 'contact'].join(',');
        `,
      },
      entryPoints: ["/src/app/entry.ts"],
      outdir: "/build",
      run: {
        stdout: "app entry\nheader rendering\nmenu showing\nitems: home,about,contact",
      },
    });

    for (const minify of [false, true]) {
      itBundled(`compile/splitting/ImportMetaInSplitChunk${minify ? "+minify" : ""}`, {
        compile: true,
        splitting: true,
        bytecode: true,
        format: "esm",
        ...(minify ? { minifySyntax: true, minifyIdentifiers: true, minifyWhitespace: true } : {}),
        files: {
          "/entry.ts": /* js */ `
            const mod = await import("./worker.ts");
            mod.run();
          `,
          "/worker.ts": /* js */ `
            export function run() {
              console.log(typeof import.meta.url === "string" ? "ok" : "fail");
              console.log(typeof import.meta.dir === "string" ? "ok" : "fail");
            }
          `,
        },
        run: {
          stdout: "ok\nok",
        },
      });
    }
  });
});