bun.sh/test/bake/dev/bundle.test.ts

// Bundle tests are tests concerning bundling bugs that only occur in DevServer.
import { devTest, minimalFramework, Step } from "../dev-server-harness";

devTest("import identifier doesnt get renamed", {
  framework: minimalFramework,
  files: {
    "db.ts": `export const abc = "123";`,
    "routes/index.ts": `
      import { abc } from '../db';
      export default function (req, meta) {
        let v1 = "";
        const v2 = v1
          ? abc.toFixed(2)
          : abc.toString();
        return new Response('Hello, ' + v2 + '!');
      }
    `,
  },
  async test(dev) {
    await dev.fetch("/").expect("Hello, 123!");
    await dev.write("db.ts", `export const abc = "456";`);
    await dev.fetch("/").expect("Hello, 456!");
    await dev.patch("routes/index.ts", {
      find: "Hello",
      replace: "Bun",
    });
    await dev.fetch("/").expect("Bun, 456!");
  },
});
devTest("symbol collision with import identifier", {
  framework: minimalFramework,
  files: {
    "db.ts": `export const abc = "123";`,
    "routes/index.ts": `
      let import_db = 987;
      import { abc } from '../db';
      export default function (req, meta) {
        let v1 = "";
        const v2 = v1
          ? abc.toFixed(2)
          : abc.toString();
        return new Response('Hello, ' + v2 + ', ' + import_db + '!');
      }
    `,
  },
  async test(dev) {
    await dev.fetch("/").expect("Hello, 123, 987!");
    await dev.write("db.ts", `export const abc = "456";`);
    await dev.fetch("/").expect("Hello, 456, 987!");
  },
});