added implementation of simple integration dataset

tests/test_simple_integration.py

@@ -0,0 +1,85 @@
+import random
+from fractions import Fraction
+
+import pytest
+import sympy
+from sympy.parsing.sympy_parser import parse_expr
+
+from reasoning_gym.algebra.simple_integration import SimpleIntegrationConfig, SimpleIntegrationDataset
+
+
+def test_simple_integration_config_validation():
+    """Test that invalid configs raise appropriate errors"""
+    with pytest.raises(AssertionError):
+        config = SimpleIntegrationConfig(min_bounds=0)
+        config.validate()
+
+    with pytest.raises(AssertionError):
+        config = SimpleIntegrationConfig(max_bounds=5, min_bounds=10)
+        config.validate()
+
+    with pytest.raises(AssertionError):
+        config = SimpleIntegrationConfig(min_terms=-1)
+        config.validate()
+
+    with pytest.raises(AssertionError):
+        config = SimpleIntegrationConfig(max_terms=2, min_terms=5)
+        config.validate()
+
+    with pytest.raises(AssertionError):
+        config = SimpleIntegrationConfig(min_degree=-11)
+        config.validate()
+
+    with pytest.raises(AssertionError):
+        config = SimpleIntegrationConfig(max_degree=3, min_degree=5)
+        config.validate()
+
+    with pytest.raises(AssertionError):
+        config = SimpleIntegrationConfig(operators=("+", "-", "*"))
+        config.validate()
+
+
+def test_simple_integration_dataset_deterministic():
+    """Test that dataset generates same items with same seed"""
+    config = SimpleIntegrationConfig(seed=42, size=10)
+    dataset1 = SimpleIntegrationDataset(config)
+    dataset2 = SimpleIntegrationDataset(config)
+
+    for i in range(len(dataset1)):
+        assert dataset1[i] == dataset2[i]
+
+
+def test_simple_integration_dataset_items():
+    """Test that dataset items are valid"""
+    config = SimpleIntegrationConfig(seed=42, size=10)
+    dataset = SimpleIntegrationDataset(config)
+
+    for i in range(len(dataset)):
+        item = dataset[i]
+        assert isinstance(item, dict)
+        assert "question" in item
+        assert "answer" in item
+        assert "metadata" in item
+
+        assert "integrand" in item["metadata"]
+        assert "variable" in item["metadata"]
+        assert "antiderivative" in item["metadata"]
+
+        # Verify answer is a mathematical expression
+        answer = item["answer"]
+        answer = answer.replace(" + C", "")
+        assert isinstance(parse_expr(answer), sympy.Expr)
+
+
+def test_simple_integration_solution_verification():
+    """Test for solution verification of each answer"""
+    config = SimpleIntegrationConfig(seed=42, size=10)
+    dataset = SimpleIntegrationDataset(config)
+
+    for item in dataset:
+        integrand = parse_expr(item["metadata"]["integrand"])
+        variable = sympy.Symbol(item["metadata"]["variable"])
+        answer = parse_expr(item["answer"].replace(" + C", ""))
+
+        # Verify that the derivative of the answer equals the integrand
+        assert sympy.simplify(sympy.diff(answer, variable) - integrand) == 0