| 1 | """
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| 2 | Persistence and integrity verification tests for Flex-O entities.
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| 3 | Ensures fingerprints survive JSON export/import and detect tampering.
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| 4 | """
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| 5 | import json
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| 6 | import pytest
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| 7 |
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| 8 | from flexoentity import EntityState, EntityType, Domain
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| 9 |
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| 10 | @pytest.fixture
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| 11 | def approved_question():
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| 12 | """Provide a fully approved and published SingleChoiceQuestion for persistence tests."""
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| 13 | q = SingleChoiceQuestion(
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| 14 | domain=Domain(domain="GEN", entity_type=EntityType.DOMAIN, state=EntityState.DRAFT),
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| 15 | entity_type=None, # SingleChoiceQuestion sets this internally to EntityType.ITEM
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| 16 | state=EntityState.DRAFT,
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| 17 | text="What is Ohm’s law?",
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| 18 | options=[
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| 19 | AnswerOption(id="OP1", text="U = R × I", points=1),
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| 20 | AnswerOption(id="OP2", text="U = I / R", points=0),
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| 21 | AnswerOption(id="OP3", text="R = U × I", points=0),
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| 22 | ],
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| 23 | )
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| 24 | q.approve()
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| 25 | q.sign()
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| 26 | q.publish()
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| 27 | return q
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| 28 |
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| 29 |
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| 30 | @pytest.mark.skip(reason="FlexOIDs regenerated on import; enable once JSON format is stable")
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| 31 | def test_json_roundtrip_preserves_integrity(approved_question):
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| 32 | """
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| 33 | Export to JSON and reload — ensure fingerprints and signatures remain valid.
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| 34 | """
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| 35 | json_str = approved_question.to_json()
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| 36 | print("JSON", json_str)
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| 37 | loaded = SingleChoiceQuestion.from_json(json_str)
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| 38 |
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| 39 | print("Approved", approved_question.text_seed)
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| 40 | print("Loaded", loaded.text_seed)
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| 41 | # Fingerprint and state should match — integrity must pass
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| 42 | assert SingleChoiceQuestion.verify_integrity(loaded)
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| 43 |
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| 44 | # Metadata should be preserved exactly
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| 45 | assert approved_question.fingerprint == loaded.fingerprint
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| 46 | assert approved_question.flexo_id == loaded.flexo_id
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| 47 | assert loaded.state == approved_question.state
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| 48 |
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| 49 | @pytest.mark.skip(reason="FlexOIDs regenerated on import; tampering detection not yet implemented")
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| 50 | def test_json_tampering_detection(approved_question):
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| 51 | """Tampering with content should invalidate fingerprint verification."""
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| 52 | json_str = approved_question.to_json()
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| 53 | tampered = json.loads(json_str)
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| 54 | tampered["text"] = "Tampered content injection"
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| 55 | tampered_json = json.dumps(tampered)
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| 56 |
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| 57 | loaded = SingleChoiceQuestion.from_json(tampered_json)
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| 58 | assert not SingleChoiceQuestion.verify_integrity(loaded)
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| 59 |
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| 60 | @pytest.mark.skip(reason="FlexOIDs regenerated on import; corruption detection not yet applicable")
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| 61 | def test_json_file_corruption(approved_question, tmp_path):
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| 62 | """Simulate file corruption — integrity check must fail."""
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| 63 | file = tmp_path / "question.json"
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| 64 | json_str = approved_question.to_json()
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| 65 | file.write_text(json_str)
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| 66 |
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| 67 | # Corrupt the file (simulate accidental byte modification)
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| 68 | corrupted = json_str.replace("Ohm’s", "Omm’s")
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| 69 | file.write_text(corrupted)
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| 70 |
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| 71 | loaded = SingleChoiceQuestion.from_json(file.read_text())
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| 72 | assert not SingleChoiceQuestion.verify_integrity(loaded)
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