[jkowalleck]

Function is_valid_syntax issues a warning if an unexpected error occurred

[jkowalleck]

@copilot add a new file that tests that the new warning is thorw.

[Copilot]

@copilot add a new file that tests that the new warning is thorw.

Added tests/test_is_valid_syntax_warning.py in commit $(git -C /home/runner/work/rfc3987-syntax2/rfc3987-syntax2 rev-parse --short HEAD). It patches parse to raise a plain LarkError and asserts that is_valid_syntax emits a RuntimeWarning and returns False, covering all three valid term values (iri, iri_reference, absolute_iri).

@copilot add a new file that tests that the new warning is thorw.

Added tests/test_is_valid_syntax_warning.py in commit 0a3e845. It patches parse to raise a plain LarkError and asserts that is_valid_syntax emits a RuntimeWarning matching "Unexpected LarkError" and returns False, covering all three valid term values (iri, iri_reference, absolute_iri).

[Copilot]

Pull request overview

This PR adds a warning path to the RFC3987 syntax validation helpers so consumers can distinguish between “invalid syntax” and “unexpected internal Lark error” scenarios.

Changes:

• Update is_valid_syntax() to return False for UnexpectedInput without warning, and warn+return False for other LarkError subclasses.
• Add a regression test ensuring a RuntimeWarning is emitted for non-UnexpectedInput LarkErrors.
• Document the behavior change in the Unreleased changelog.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
tests/test_is_valid_syntax_warning.py	Adds test coverage for warning behavior on unexpected LarkError.
src/rfc3987_syntax2/syntax_helpers.py	Implements warning behavior for unexpected Lark errors; adjusts validator exception handling.
CHANGELOG.md	Notes the new warning behavior for is_valid_syntax().

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[jkowalleck]

released via https://github.com/jkowalleck/rfc3987-syntax2/releases/tag/v1.3.0