Allowed running automated and manual tests written in TS

[oleq]

Suggested merge commit message (convention)

Feature (tests): Allowed running automated and manual tests written in TS. Closes ckeditor/ckeditor5#11888.

[coveralls]

Coverage increased (+0.01%) to 88.626% when pulling 5915dbf on ck/11888-tests-in-ts into 0234336 on ck/11717-ts-in-manual-tests.

[pomek]

While I didn't have any issues running manual tests, I could not figure out how to enable automated tests.

Please, take a look at the attached errors:

ERROR in ./packages/ckeditor5-utils/tests/dom/iswindow.ts
Module build failed (from ./node_modules/ts-loader/index.js):
Error: TypeScript emitted no output for /Users/pomek/Projects/ckeditor/ckeditor5/packages/ckeditor5-utils/tests/dom/iswindow.ts.
    at makeSourceMapAndFinish (/Users/pomek/Projects/ckeditor/ckeditor5/node_modules/ts-loader/dist/index.js:52:18)
    at successLoader (/Users/pomek/Projects/ckeditor/ckeditor5/node_modules/ts-loader/dist/index.js:39:5)
    at Object.loader (/Users/pomek/Projects/ckeditor/ckeditor5/node_modules/ts-loader/dist/index.js:22:5)
 @ ./build/.automated-tests/entry-point.js 2:0-97

ERROR in /Users/pomek/Projects/ckeditor/ckeditor5/packages/ckeditor5-utils/tests/dom/iswindow.ts
14:2-8
[tsl] ERROR in /Users/pomek/Projects/ckeditor/ckeditor5/packages/ckeditor5-utils/tests/dom/iswindow.ts(14,3)
      TS2304: Cannot find name 'expect'.

ERROR in /Users/pomek/Projects/ckeditor/ckeditor5/packages/ckeditor5-utils/tests/dom/iswindow.ts
15:2-8
[tsl] ERROR in /Users/pomek/Projects/ckeditor/ckeditor5/packages/ckeditor5-utils/tests/dom/iswindow.ts(15,3)
      TS2304: Cannot find name 'expect'.

ERROR in /Users/pomek/Projects/ckeditor/ckeditor5/packages/ckeditor5-utils/tests/dom/iswindow.ts
16:2-8
[tsl] ERROR in /Users/pomek/Projects/ckeditor/ckeditor5/packages/ckeditor5-utils/tests/dom/iswindow.ts(16,3)
      TS2304: Cannot find name 'expect'.

ERROR in /Users/pomek/Projects/ckeditor/ckeditor5/packages/ckeditor5-utils/tests/dom/iswindow.ts
17:2-8
[tsl] ERROR in /Users/pomek/Projects/ckeditor/ckeditor5/packages/ckeditor5-utils/tests/dom/iswindow.ts(17,3)
      TS2304: Cannot find name 'expect'.

ERROR in /Users/pomek/Projects/ckeditor/ckeditor5/packages/ckeditor5-utils/tests/dom/iswindow.ts
18:2-8
[tsl] ERROR in /Users/pomek/Projects/ckeditor/ckeditor5/packages/ckeditor5-utils/tests/dom/iswindow.ts(18,3)
      TS2304: Cannot find name 'expect'.

ERROR in /Users/pomek/Projects/ckeditor/ckeditor5/packages/ckeditor5-utils/tests/dom/iswindow.ts
19:2-8
[tsl] ERROR in /Users/pomek/Projects/ckeditor/ckeditor5/packages/ckeditor5-utils/tests/dom/iswindow.ts(19,3)
      TS2304: Cannot find name 'expect'.

ERROR in /Users/pomek/Projects/ckeditor/ckeditor5/packages/ckeditor5-utils/tests/dom/iswindow.ts
29:2-8
[tsl] ERROR in /Users/pomek/Projects/ckeditor/ckeditor5/packages/ckeditor5-utils/tests/dom/iswindow.ts(29,3)
      TS2304: Cannot find name 'expect'.

I've tried to import @types/mocha in the generated entry-point file and directly in the test. Unfortunately, with no luck. Updating the tsconfig.json file with types: [ ... ] didn't help too.

Would you like to share any tips that might resolve my issues?

[pomek]

In CKEditor 5 I was using the #ck/epic/11708-migrate-typescript-mvp branch.

[oleq]

Just to be clear, you just renamed the automated test iswindow.js to iswindow.ts? 

If so, this is OK that mocha does not work yet. In this PR I wanted to unblock further work but I didn't spend time on the framework (mocha, sinon, etc.). We'll cover this in the future but for now it is enough that the runner considers .ts files.

[pomek]

When compiling a manual test, tsc prints unrelated errors. It should not process automated tests.

[oleq]

🤔 This PR enables things on the webpack level. Bringing TS support for chai (and sinon, and... other libs) is another thing. But maybe you're right, maybe this PR got too broad at some wildcard.

[pomek]

Closing in favor of #886.