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chore(e2e-test): add regression test for dynamic import() MONGOSH-1062 #2458

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Merged
merged 6 commits into from
Aug 4, 2025
+26 −2
Merged

chore(e2e-test): add regression test for dynamic import() MONGOSH-1062 #2458

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64e90fc
chore(e2e-test): add regression test for dynamic import() MONGOSH-1062
addaleax May 22, 2025
f9d2960
fixup: `git add -f` so that node_modules changes are applied as well
addaleax May 28, 2025
eb369f0
Merge branch 'main' into 1062-dev
addaleax Jun 10, 2025
908e8d5
Merge branch 'main' into 1062-dev
addaleax Jun 16, 2025
4f546c5
fixup: review comment
addaleax Aug 4, 2025
41edd42
Merge branch 'main' into 1062-dev
addaleax Aug 4, 2025
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23 changes: 21 additions & 2 deletions packages/e2e-tests/test/e2e.spec.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -1170,22 +1170,40 @@ describe('e2e', function () {
env: {
...process.env,
NODE_PATH: path.resolve(__dirname, 'fixtures', 'node-path'),
NODE_OPTIONS: '--expose-gc',
},
});
await shell.waitForPrompt();
shell.assertNoErrors();
});

it('require() searches the current working directory according to Node.js rules', async function () {
let result;
it('require() and import() search the current working directory according to Node.js rules', async function () {
let result: string;
result = await shell.executeLine('require("a")');
expect(result).to.match(/Error: Cannot find module 'a'/);
result = await shell.executeLine('require("./a")');
expect(result).to.match(/^A$/m);
result = await shell.executeLine('require("b")');
expect(result).to.match(/^B$/m);
result = await shell.executeLine('require("b-esm").value');
expect(result).to.match(/^B-ESM$/m);
result = await shell.executeLine('require("c")');
expect(result).to.match(/^C$/m);
result = await shell.executeLine('import("b").then(m => m.default)');
expect(result).to.match(/^B$/m);
result = await shell.executeLine('import("b-esm").then(m => m.value)');
expect(result).to.match(/^B-ESM$/m);
});

// Regression test for https://github.com/nodejs/node/issues/38695
it('import() works when interleaved with GC', async function () {
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what is the relationship between the garbage collector and import that would cause issues?

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@gagik Sorry, completely missed this comment! The original ticket is nodejs/node#38695, I'll link it here in the comments as well – basically, Node.js internals had a memory management bug where a C++ object describing modules could get deleted during garbage collection while the "public" JS module instance was still alive, and then accessing that C++ object from JS would crash

Suggested change
it('import() works when interleaved with GC', async function () {
// Regression test for https://github.com/nodejs/node/issues/38695
it('import() works when interleaved with GC', async function () {

Obviously this is really more of a Node.js issue and one could argue that we don't need a specific regression test here in mongosh, but I'd feel more comfortable having it in place for when we start having a "proper" ESM story in mongosh (i.e. mongosh scripts with import/export).

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thank you! the link in comments is helpful.

await shell.executeLine('importESM = () => import("b-esm")');
expect(await shell.executeLine('globalThis.gc(); "ran gc"')).to.include(
'ran gc'
);
const result = await shell.executeLine('importESM().then(m => m.value)');
expect(result).to.match(/^B-ESM$/m);
shell.assertNoErrors();
});

it('Can use Node.js APIs without any extra effort', async function () {
Expand All @@ -1194,6 +1212,7 @@ describe('e2e', function () {
`fs.readFileSync(${JSON.stringify(__filename)}, 'utf8')`
);
expect(result).to.include('Too lazy to write a fixture');
shell.assertNoErrors();
});
});

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1 change: 1 addition & 0 deletions packages/e2e-tests/test/fixtures/require-base/node_modules/b-esm/index.mjs
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4 changes: 4 additions & 0 deletions packages/e2e-tests/test/fixtures/require-base/node_modules/b-esm/package.json
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