Snapshot Testing Failing

[automartin5000]

I'm trying a simple snapshot test on a project type that extends the JSII project type and it's failing.

Test:

const snapshot = Testing.synth(project);
test("project snapshot", () => {
  expect(snapshot).toMatchSnapshot();
});

Error:

Trying to capture a snapshot of a project outside of tmpdir, which implies this test might corrupt an existing project

I read through these docs, but didn't see anything to immediately explain it. I also tried looking at projen's own tests, but didn't see any project options that looked unique other than clobber.

I figure it might have something to do with needing to set a temp snapshot directory? But can't figure out how to do that.

[automartin5000]

Figured it out. I did in fact need to pass it an outdir. I'm a bit surprised this isn't baked into the Testing class?

const tmpdir = fs.mkdtempSync(path.join(os.tmpdir(), 'my-test'));
const project = new Project({ outdir: tmpdir });

[mrgrain]

Yes, it should be 👀

Although I didn't even know about this class. 🤣

[mrgrain]

This is a bug. Revert PR: #3334