[Gonza10V]

Motivation

• Ensure SBOL3 export functionality continues to work for common LOICA constructs and detect regressions in generation/serialization of SBOL documents.
• Validate end-to-end export for a representative set of genetic networks including Source, Hill1 (buffer and NOT), Receiver, Hill2 (NOR), and a 3-node repressilator.

Description

• Added a new test module tests/test_sbol_export.py that builds networks from Regulator, Reporter, Supplement, Source, Hill1, Hill2, and Receiver and exercises GeneticNetwork.to_sbol().
• Introduced test helpers: an autouse fixture to set an SBOL namespace with sbol3.set_namespace, dna_part() to create DNA Components, convenience constructors regulator(), reporter(), and supplement(), and assert_exports_to_sbol() to validate the produced sbol3.Document and serialized output file.
• Added tests for an empty network, a source, Hill1 buffer, Hill1 NOT, receiver (chemical input), Hill2 NOR, and a repressilator network that assert the document is produced, contains a top-level geneticnetwork, and can be written to sorted N-Triples.
• Tests rely on the existing loica API and sbol3 for serialization and inspect the document object counts as a basic sanity check.

Testing

• Ran python -m py_compile tests/test_sbol_export.py to validate the test file compiles successfully (passed).
• Ran pytest -q to execute the new tests and existing suite, resulting in all tests passing (7 passed).

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Codex Task