OpenApiInteractionValidator does not find any errors in trivial error cases

OpenApiInteractionValidator seems to be ignoring almost all request errors. Seems like I am missing some configuration option or the tool is really extremely limited. I have checked my spec against several validators (it is correct) and editors (contents are properly understood).

Here is my code:

OpenApiInteractionValidator validator = OpenApiInteractionValidator.createFor(/** my quite complex spec */)
            .withLevelResolver(LevelResolver.create().withDefaultLevel(ValidationReport.Level.ERROR).build())
            .build();

ValidationReport report = validator.validateRequest(SimpleRequest.Builder
    .post("/some-endpoint-from-spec")
    .withBody("{}")
    .build()
);

assertThat(report.hasErrors())
   .describedAs("Errors from the report: %s", report.getMessages())
   .isFalse();
log.info("Messages from the report: {}", report.getMessages());

JSON body is required for the my endpoint and the JSON object must contain several properties. OpenApiInteractionValidator considers correct following cases:

• empty object body {}
• object body with invalid property
• invalid JSON

The only errors it has detected:

• invalid path
• empty body

No message is produced in report, so this is not a case of errors being ignored.

Is the tool really that limited or am I missing something essential in configuration?

After some debugging.

It seems the library does not reject and cannot verify requests without content type. After adding content type the library correctly spots all kind of errors.