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import unittest
import numpy as np
import sympy as sp
import os
import sys
# Add path for Expression class
sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), '../classes')))
from expression import Expression
from dataset import RegressionDataset
import pickle
class TestExpression(unittest.TestCase):
def setUp(self):
# Generate synthetic dataset
reg = RegressionDataset('./data/evaluate/srsd-feynman_easy/train', 'feynman-i.12.1.txt', delimiter=' ')
self.X, self.y = reg.get_numpy()
def test_complex_expression(self):
# Define the complex expression
goal_expression = "C*(x_1 * x_2 + C)"
try:
expr_goal = Expression(goal_expression)
r2 = expr_goal.fit_constants(self.X, self.y)
resolved_expr = expr_goal.resolved_expression()
best_constants = expr_goal.best_constants
# Assert R^2 is reasonable (close to 1 for a good fit)
self.assertGreater(r2, 0.9, f"R^2 is too low: {r2}")
# Print results for debugging
print(f"Fitted Constants: {best_constants}")
print(f"Resolved Expression (SymPy): {resolved_expr}")
print(f"R^2: {r2:.4f}")
except Exception as e:
self.fail(f"Error processing goal expression '{goal_expression}': {e}")
if __name__ == "__main__":
unittest.main() |