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Tests for Safety Validator
"""
import pytest
from database.safety_validator import SafetyValidator
class TestSafetyValidator:
"""Test cases for SQL safety validation"""
def setup_method(self):
"""Set up test fixtures"""
self.validator = SafetyValidator()
def test_valid_select_query(self):
"""Test that valid SELECT queries pass validation"""
query = "SELECT * FROM cars WHERE make = 'BMW'"
is_valid, error = self.validator.validate_query(query)
assert is_valid is True
assert error == ""
def test_delete_query_blocked(self):
"""Test that DELETE queries are blocked"""
query = "DELETE FROM cars WHERE id = 1"
is_valid, error = self.validator.validate_query(query)
assert is_valid is False
assert "DELETE" in error
def test_drop_query_blocked(self):
"""Test that DROP queries are blocked"""
query = "DROP TABLE cars"
is_valid, error = self.validator.validate_query(query)
assert is_valid is False
assert "DROP" in error
def test_update_query_blocked(self):
"""Test that UPDATE queries are blocked"""
query = "UPDATE cars SET price = 0"
is_valid, error = self.validator.validate_query(query)
assert is_valid is False
assert "UPDATE" in error
def test_insert_query_blocked(self):
"""Test that INSERT queries are blocked"""
query = "INSERT INTO cars VALUES (1, 'test')"
is_valid, error = self.validator.validate_query(query)
assert is_valid is False
assert "INSERT" in error
def test_truncate_query_blocked(self):
"""Test that TRUNCATE queries are blocked"""
query = "TRUNCATE TABLE cars"
is_valid, error = self.validator.validate_query(query)
assert is_valid is False
assert "TRUNCATE" in error
def test_alter_query_blocked(self):
"""Test that ALTER queries are blocked"""
query = "ALTER TABLE cars ADD COLUMN test VARCHAR(50)"
is_valid, error = self.validator.validate_query(query)
assert is_valid is False
assert "ALTER" in error
def test_empty_query(self):
"""Test that empty queries are rejected"""
query = ""
is_valid, error = self.validator.validate_query(query)
assert is_valid is False
assert "Empty query" in error
def test_non_select_query(self):
"""Test that non-SELECT queries are rejected"""
query = "SHOW TABLES"
is_valid, error = self.validator.validate_query(query)
assert is_valid is False
assert "Only SELECT" in error
def test_sql_injection_attempt(self):
"""Test that SQL injection patterns are detected"""
query = "SELECT * FROM cars; DELETE FROM cars"
is_valid, error = self.validator.validate_query(query)
assert is_valid is False
def test_complex_select_query(self):
"""Test that complex SELECT queries pass"""
query = """
SELECT make, model, AVG(sellingprice) as avg_price
FROM cars
WHERE year > 2010
GROUP BY make, model
ORDER BY avg_price DESC
LIMIT 10
"""
is_valid, error = self.validator.validate_query(query)
assert is_valid is True
assert error == ""
def test_case_insensitive_blocking(self):
"""Test that dangerous keywords are blocked regardless of case"""
queries = [
"delete from cars",
"DELETE FROM cars",
"DeLeTe FrOm cars"
]
for query in queries:
is_valid, error = self.validator.validate_query(query)
assert is_valid is False
assert "DELETE" in error.upper()
if __name__ == "__main__":
pytest.main([__file__, "-v"])
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