"""
Core Regression Tests

Tests to ensure core verification engines don't break with updates.
These tests are placeholder documentation until API server is running.
"""

import pytest


# All tests are marked as skip since they require a running QWED API
pytestmark = pytest.mark.skip(reason="Requires QWED API server to be running")


def test_math_engine_basic_operations():
    """
    Regression test: Ensure basic math operations still work
    
    Will test: 2+2, 10-5, 3*4, 15/3, 2**3
    """
    pass


def test_math_engine_functions():
    """
    Regression test: Mathematical functions
    
    Will test: sqrt, sin, cos, log, exp
    """
    pass


def test_code_engine_regression():
    """
    Regression test: Code verification still catches issues
    
    Will test: valid code acceptance, syntax error detection, security risk detection
    """
    pass


def test_sql_engine_regression():
    """
    Regression test: SQL validation and security
    
    Will test: valid SQL acceptance, SQL injection detection
    """
    pass


def test_fact_engine_tf_idf_still_works():
    """
    Regression test: TF-IDF grounding remains deterministic
    
    Critical: QWED's deterministic fact verification must not regress
    """
    pass


def test_pii_engine_still_detects():
    """
    Regression test: PII detection doesn't regress
    
    Will test: SSN, email, phone, credit card detection
    """
    pass


def test_logic_engine_regression():
    """
    Regression test: Logical reasoning engine
    
    Will test: valid syllogisms, invalid logic detection
    """
    pass


def test_stats_engine_regression():
    """
    Regression test: Statistical verification
    
    Will test: mean, median, mode calculations
    """
    pass


if __name__ == "__main__":
    pytest.main([__file__, "-v"])
