Error position is incorrect when tests fail about blueprint HOT 4 OPEN

After a long string of investigation, I found the underlying issue: it's the fact that jest installs source-map-support when running tests, but the compile function from blueprint registers ts-node (to import .ts files), which installs source-map-support of its own, and they seem to be conflicting with each other, messing with the source maps.

One way to fix it as I see it (there could be others) is to turn off the source-map-support of ts-node, and there's a pending issue for that: TypeStrong/ts-node#796

I might submit a PR to ts-node to fix it, which will in turn allow to fix this.

from blueprint.

Thanks. Is there any workaround for now?

from blueprint.

There kind of is, but it's really more of a hack than anything else, and might (probably will) mess with your source maps elsewhere. However if it's only tests that matter, you can open node_modules/ts-node/dist/index.js and comment out the line that installs source map support (ctrl+f sourcemap should do the trick), but once again, this is a major hack and is very likely to mess with your source maps in things other than tests (deploy scripts etc.)

from blueprint.

Thanks, it worked.

from blueprint.