bundler.test.ts66 lines · main

1	import { test } from 'node:test';
2	import { strict as assert } from 'node:assert';
3	import { mkdir, mkdtemp, rm, writeFile } from 'node:fs/promises';
4	import { tmpdir } from 'node:os';
5	import { join } from 'node:path';
6	import { loadProjectSchema } from './bundler.js';
7
8	/**
9	* Write a throwaway project and run `fn` against it.
10	*
11	* `moduleType` controls the project's package.json `type` field, which is what
12	* decides whether the loader's tsx import treats `briven/schema.ts` as
13	* CommonJS or ESM — the exact axis the CJS/ESM interop unwrap exists for.
14	*/
15	async function withProject(
16	source: string,
17	moduleType: 'commonjs' | 'module',
18	fn: (cwd: string) => Promise<void>,
19	): Promise<void> {
20	const dir = await mkdtemp(join(tmpdir(), 'briven-bundler-'));
21	try {
22	await writeFile(
23	join(dir, 'package.json'),
24	JSON.stringify({ name: 'tmp', type: moduleType }),
25	'utf8',
26	);
27	await mkdir(join(dir, 'briven'), { recursive: true });
28	await writeFile(join(dir, 'briven', 'schema.ts'), source, 'utf8');
29	await fn(dir);
30	} finally {
31	await rm(dir, { recursive: true, force: true });
32	}
33	}
34
35	test('loadProjectSchema returns null when schema.ts is missing', async () => {
36	const dir = await mkdtemp(join(tmpdir(), 'briven-bundler-'));
37	try {
38	assert.equal(await loadProjectSchema(dir), null);
39	} finally {
40	await rm(dir, { recursive: true, force: true });
41	}
42	});
43
44	test('loadProjectSchema accepts a plain ESM default export', async () => {
45	await withProject('export default { version: 1, tables: {} };\n', 'module', async (cwd) => {
46	const schema = await loadProjectSchema(cwd);
47	assert.equal(schema?.version, 1);
48	});
49	});
50
51	test('loadProjectSchema unwraps the CJS/ESM double-default shape', async () => {
52	// Bug repro: in a CommonJS project, `export default schema({...})` is
53	// interop-double-wrapped to `mod.default.default`, so the loader used to
54	// reject a perfectly valid schema with "is not a valid briven schema".
55	await withProject('export default { version: 1, tables: {} };\n', 'commonjs', async (cwd) => {
56	const schema = await loadProjectSchema(cwd);
57	assert.equal(schema?.version, 1);
58	assert.deepEqual(schema?.tables, {});
59	});
60	});
61
62	test('loadProjectSchema rejects a non-schema default export', async () => {
63	await withProject('export default { version: 2, tables: {} };\n', 'commonjs', async (cwd) => {
64	await assert.rejects(loadProjectSchema(cwd), /not a valid briven schema/);
65	});
66	});