automated test to verify typescript compiler builds of resulting TS file

[zewa666]

with the latest release and combination with a newer TypeScript version, there was a new issue introduced (see PR #17). It would be great if we could add an integration test to make sure this type of issues is getting caught.

Besides that, changing return types of functions is considered a breaking-change so the latest release really should have been bumped with 0.2.0 due to non RC policy with SemVer instead of a major bump

[pjmolina]

Thanks for reporting @zewa666 & @stifflerus

Tried to reproduce with tsc 2.7.1 and 2.8.3 and I was not able to reproduce it yet.
We need to create a repro-test to make the problem evident.

Could provide a sample of:

1. how you are importing the parser
2. the tsconfig.json settings you are using

[pjmolina]

Error unnoticed introduced during PR #8 (cc @yokljo)
Fixed at PR #20
Published as npm module version: 0.2.0
Keeping this issue open till adding a repro-test.

[stifflerus]

The bug is present when the typescript compiler is invoked with the --declaration option. This makes typescript generate .d.ts files.

I added this option to the compile:sample npm script, and found an additional export that was missed in PR #20.

However, now the build fails because the declaration files do not pass lint:samples. It believe it would be appropriate to exclude these from tslint.

tslint output/*.ts matches the declaration files also (*.d.ts)
The solution I came up with is tslint `find output -not -iname *.d.ts -iname *.ts` .
There is probably a more elegant way of doing that and I am open to suggestions.

[stifflerus]

Opened PR #21

[zewa666]

Good idea @stifflerus, although in the current form the linter isn't automatically started, unless the developer thinks about it. I'd recommend adding Husky with a prepush/precommit hook that will help contributors as well to check for linting issues.

@pjmolina can you flag the 0.14.0 version as deprecated? That should make it easier for people having auto-patch-upgrades enabled, to detect the breaking change easier, with a notice to upgrade to v.0.2.x

[pjmolina]

Fixed with PR #21 tsc --declaration did the trick to expose the issue.
Marked v. 0.1.14 as deprecated.
Published as v. 0.2.1
Thank you @zewa666 & @stifflerus

[trusktr]

I've opened a request to fix issues like these in TypeScript by bringing declaration files to parity with language features. microsoft/TypeScript#35822