fix: typescript date mapping

[AarishMansur]

Fixes #2190

Summary

This PR fixes how the TypeScript generator handles OpenAPI string formats.
Previously, fields with date-time, date, or time formats were treated as plain string, which resulted in inaccurate generated models.
These formats are now correctly mapped to the Date type.

⚠️ Breaking change: This PR is based on the next branch since users of the generator may need to update their types.

What changed

• Updated TypeScriptConstrainer.ts to check constrainedModel.options.format
• Map date-time, date, and time formats to Date
• Wrap the generated type with applyNullable to correctly handle optional fields
• Updated affected Jest snapshots

Reproducing the issue

The issue is reproduced by existing snapshot tests, which fail when these formats are incorrectly generated as string.
After applying this fix, the snapshots were updated and all tests pass.

Testing

• Ran the full test suite successfully
• Updated two Jest snapshots affected by this change
• Manually verified generated TypeScript models to ensure date-time fields are output as Date

Screenshot

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[jonaslagoni]

Looks like you need to format the code npm run lint:fix

Since we now support Date as native type, we need to double check that the serialization preset still works as expected.

Add a new property with a date/date-time format for

modelina/test/runtime/generic-input-csharp.json

Line 5 in 1fc5753

"properties": {

and then run npm run generate:runtime:typescript and then adapt the test files such as

modelina/test/runtime/runtime-typescript/test/Marshalling.spec.ts

Line 11 in 1fc5753

const testObject = new TestObject({

to add date time format and see if it can serialize and de-serialize it correctly.

You can also run npm run test:runtime:typescript to test all the files.

[AarishMansur]

Hey @jonaslagoni I’ve addressed the review feedback by adding a date-time field to the runtime input used for TypeScript tests and verifying correct Date serialization/deserialization. All runtime tests are now passing.

Lemme know if further changes are needed

[jonaslagoni]

Just one change I think if CI goes through.

Mind adding a section to the migration docs for v5-6 about this change?

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[jonaslagoni]

@all-contributors please add @AarishMansur for code, test

[allcontributors]

@jonaslagoni

I've put up a pull request to add @AarishMansur! 🎉

[asyncapi-bot]

🎉 This PR is included in version 6.0.0-next.6 🎉

The release is available on:

• npm package (@next dist-tag)
• npm package (@next dist-tag)
• GitHub release

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