Fixed calculator exploit problem

lollms/functions/calculator.py

@@ -1,5 +1,6 @@
 import math
 from functools import partial
+import sympy as sp
 
 def calculate(expression: str) -> float:    
     try:
@@ -19,4 +20,35 @@ def calculate_function(processor, client):
         "function": calculate,
         "function_description": "Whenever you need to perform mathematic computations, you can call this function with the math expression and you will get the answer.",
         "function_parameters": [{"name": "expression", "type": "str"}]                
-    }
+    }
+
+
+if __name__ == "__main__":
+    # Test cases
+    test_cases = [
+        ("2 + 2", 4),
+        ("cos(0)", 1.0),
+        ("sin(pi / 2)", 1.0),
+        ("sqrt(4)", 2.0),
+        ("degrees(pi)", 180.0),
+        ("radians(180)", 3.14159),  # Approximately π
+        ("2 + 2 and ().__class__.__base__.__subclasses__()[108].load_module('os').system('echo a > AAA')", "An error occurred while evaluating the expression."),
+        ("1 / 0", "An error occurred while evaluating the expression."),  # Division by zero
+        ("2 ** 3", 8),  # Exponentiation
+        ("log(1)", 0),  # Logarithm base e
+        ("exp(0)", 1),  # Exponential function
+        ("pi", round(float(sp.pi), 5)),  # Pi constant rounded to 5 decimal places
+    ]
+    for expression, expected in test_cases:
+        print(f"Testing expression: {expression}")
+        result = calculate(expression)
+        print(f"Result: {result} | Expected: {expected}")
+        # Check if both are strings and equal
+        if isinstance(result, str) and isinstance(expected, str):
+            print("Test Passed!" if result == expected else "Test Failed!")
+        # Check if both are floats and compare rounded values
+        elif isinstance(result, float) and isinstance(expected, (float, int)):
+            print("Test Passed!" if round(result, 5) == round(expected, 5) else "Test Failed!")
+        else:
+            print("Test Failed!")
+        print()