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OpenAPI 3.0 spec pattern constant validation

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
42/100
Issue type
Bug
Clarity
Clearly specified
Activity status
Stale
Tech stack
python

Research direction

No file or test is named in the issue. Start by reproducing the validator behavior with the two pattern examples, then locate the OpenAPI 3.0 pattern validation entry point. Done means slash-delimited ECMA 262 patterns are accepted while the undelimited form is rejected.

Written by the indexing model from the issue text.

Description

Description

According to the OpenAPI 3.0 specification for the pattern attribute of a schema object, the pattern provided should comply with ECMA 262 regular expression syntax. The syntax defined in that specification defines regular expression literals as being preceded and trailed by a '/' character, as they are in Javascript/ECMAscript.

Expected behaviour

Pattern specified in a specification as:

pattern: /regular expression/

should be valid, patterns specified without the leading and trailing '/' characters should not.

Actual Behavior

Both

pattern: /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/

and

pattern: ^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$

are valid pattern constants according to the validator. The second should not be valid, unless I'm misreading the two specification documents linked above.

This is a follow up on Connexion issue number 871.

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