`bun test` with Astro `experimental_AstroContainer` incompatible with Node

What version of Bun is running?

1.1.27+267afa293

What platform is your computer?

Darwin 23.6.0 x86_64 i38 OR Linux 6.1.43 x86_64 unknown

What steps can reproduce the bug?

Test file


import { experimental_AstroContainer as AstroContainer } from "astro/container";
import { expect, test } from "vitest"; // same result with `bun:test`
import Index from "./index.astro";

const runner = typeof Bun === "undefined" ? "Node" : "Bun";

test(Running with ${runner}, async () => { const container = await AstroContainer.create(); const result = await container.renderToString(Index);

expect(result).toContain("Bun Test?"); });


2. Run
```log
➜ bunx vitest run

 RUN  v2.1.0 /project/workspace

 ✓ src/pages/index.test.ts (1)
   ✓ Running with Node

 Test Files  1 passed (1)
      Tests  1 passed (1)
   Start at  23:28:02
   Duration  1.41s (transform 635ms, setup 0ms, collect 1.14s, tests 59ms, environment 0ms, prepare 58ms)

➜ bun test       
bun test v1.1.27 (267afa29)

src/pages/index.test.ts:
 6 | 
 7 | test(`Running with ${runner}`, async () => {
 8 |   const container = await AstroContainer.create();
 9 |   const result = await container.renderToString(Index);
10 | 
11 |   expect(result).toContain("Bun Test?");
                      ^
error: expect(received).toContain(expected)

Expected to contain: "Bun Test?"
Received: "<!DOCTYPE html></project/workspace/src/pages/index.astro server:root=\"true\"><//project/workspace/src/pages/index.astro>"

      at /project/workspace/src/pages/index.test.ts:11:18
✗ Running with Bun [13.93ms]

 0 pass
 1 fail
 1 expect() calls
Ran 1 tests across 1 files. [345.00ms]

What is the expected behavior?

bun test to work at least when importing bun:test.

What do you see instead?

See above.

Additional information

Codesandbox: https://codesandbox.io/p/devbox/bun-test-astro-container-bug-g4hgsp?file=%2Fsrc%2Fpages%2Findex.test.ts

oven-sh / bun