Vitest?

[snarkipus]

Not sure if there is any interest or not, but I gave Vitest a spin (I was curious after my jest challenges) and it's pretty performant. Since it uses the same API as Jest there was hardly anything to change beyond tweaking a few lines of config and adding the vitest config file. If anything, it's a bit cleaner from a dependency perspective .

LINK

[spoenemann]

I'm open to switching.

[msujew]

I'd also be quite interested in using Vitest instead of Jest for our tests. Would you like to contribute that change?

[snarkipus]

I'd be happy to - let me just double check that nothing broke with #686 and I'll get a PR together.

[snarkipus]

I didn't see anything that would break in that PR, so I submitted #690.

Note, I didn't even know it existed but it has a pretty sexy UI you can add as well.

[snarkipus]

@spoenemann @msujew

Not sure if there's any interest, but TypeChecking is available in Vitest now in v0.25.0. I've been using it without issue.

On the main repo, all tests except the following are successful - I'll check it out later unless you're already aware of it.

 FAIL  packages/langium/test/validation/grammar-validation.test.ts > Check grammar with primitives > No validation errors in grammar
AssertionError: Expected no issues, but found 2: expected 2 to deeply equal +0
 ❯ expectedFunction packages/langium/src/test/langium-test.ts:39:37
     37|         if (message && expect.length === 2) {
     38|             // With `jest-expect-message`
     39|             expect(actual, message).toEqual(expected);
       |                                     ^
     40|         } else {
     41|             expect(actual).toEqual(expected);
 ❯ Module.expectNoIssues packages/langium/src/test/langium-test.ts:387:5
 ❯ packages/langium/test/validation/grammar-validation.test.ts:133:9

  - Expected   "0"
  + Received   "2"
⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯[1/1]⎯
 Test Files  1 failed | 44 passed | 1 skipped (46)
      Tests  1 failed | 457 passed | 2 todo (460)
   Start at  15:17:39
   Duration  14.70s (transform 2.16s, setup 2ms, collect 42.38s, tests 28.45s)

EDIT (After a fresh pull): Maybe it's something unique to my environment.

⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯ Failed Tests 3 ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯
 FAIL  packages/langium/test/validation/grammar-validation.test.ts > checkReferenceToRuleButNotType > CrossReference validation
AssertionError: Found no issues: expected false to deeply equal true
 ❯ expectedFunction packages/langium/src/test/langium-test.ts:39:37
     37|         if (message && expect.length === 2) {
     38|             // With `jest-expect-message`
     39|             expect(actual, message).toEqual(expected);
       |                                     ^
     40|         } else {
     41|             expect(actual).toEqual(expected);
 ❯ expectIssue packages/langium/src/test/langium-test.ts:392:5
 ❯ Module.expectError packages/langium/src/test/langium-test.ts:400:5
 ❯ packages/langium/test/validation/grammar-validation.test.ts:45:9

  - Expected   "true"
  + Received   "false"

⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯[1/3]⎯
 FAIL  packages/langium/test/validation/grammar-validation.test.ts > checkReferenceToRuleButNotType > AtomType validation
AssertionError: Found no issues: expected false to deeply equal true
 ❯ expectedFunction packages/langium/src/test/langium-test.ts:39:37
     37|         if (message && expect.length === 2) {
     38|             // With `jest-expect-message`
     39|             expect(actual, message).toEqual(expected);
       |                                     ^
     40|         } else {
     41|             expect(actual).toEqual(expected);
 ❯ expectIssue packages/langium/src/test/langium-test.ts:392:5
 ❯ Module.expectError packages/langium/src/test/langium-test.ts:400:5
 ❯ packages/langium/test/validation/grammar-validation.test.ts:53:9

  - Expected   "true"
  + Received   "false"

⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯[2/3]⎯
 FAIL  packages/langium/test/validation/grammar-validation.test.ts > Check grammar with primitives > No validation errors in grammar
AssertionError: Expected no issues, but found 2: expected 2 to deeply equal +0
 ❯ expectedFunction packages/langium/src/test/langium-test.ts:39:37
     37|         if (message && expect.length === 2) {
     38|             // With `jest-expect-message`
     39|             expect(actual, message).toEqual(expected);
       |                                     ^
     40|         } else {
     41|             expect(actual).toEqual(expected);
 ❯ Module.expectNoIssues packages/langium/src/test/langium-test.ts:387:5
 ❯ packages/langium/test/validation/grammar-validation.test.ts:133:9

  - Expected   "0"
  + Received   "2"

⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯[3/3]⎯
 Test Files  1 failed | 44 passed | 1 skipped (46)
      Tests  3 failed | 455 passed | 2 todo (460)
   Start at  15:49:09
   Duration  14.19s (transform 3.11s, setup 3ms, collect 37.97s, tests 28.15s)