when I execute the Test org.eclipse.yasson.documented.DocumentationExampleTest#testDateNumberFormats1 on my local system, it fails because the BigDecimal gets serialized to 123,46 instead of 123.46 containing a comma instead of a dot as decimal divider.

This might be caused by the default localization settings (german) of my local system in combination with the used test class adding a Numberformat to the field @JsonbNumberFormat("#0.00"), but I would expect the test still not to fail depending on my local settings.

I think it is a bug as the JSON specification only allows the dot . as decimal dot and not the comma , referencing to the number section https://tools.ietf.org/html/rfc7159#section-6
So the BigDecimal 123.46 should never, even not with my german local settings get serialized to 123,46 as this results in invalid JSON.

Full JUnit output of the test org.eclipse.yasson.documented.DocumentationExampleTest#testDateNumberFormats1

org.junit.ComparisonFailure: 
Expected :{"birthDate":"07.08.1999","name":"Jason Bourne","salary":"123.46"}
Actual   :{"birthDate":"07.08.1999","name":"Jason Bourne","salary":"123,46"}