Revert "Restructure {reasoning_gym, tests}/{core, exercises, curricula}"

This reverts commit 10dbb374b0.

tests/test_simple_equations.py

@@ -0,0 +1,130 @@
+"""Tests for simple equation task generation"""
+
+import pytest
+
+from reasoning_gym.algebra.simple_equations import SimpleEquationsConfig, SimpleEquationsDataset
+
+
+def test_simple_equations_config_validation():
+    """Test that invalid configs raise appropriate errors"""
+    with pytest.raises(AssertionError):
+        config = SimpleEquationsConfig(min_terms=0)  # Too few terms
+        config.validate()
+
+    with pytest.raises(AssertionError):
+        config = SimpleEquationsConfig(min_terms=5, max_terms=3)  # max < min terms
+        config.validate()
+
+    with pytest.raises(AssertionError):
+        config = SimpleEquationsConfig(min_value=0)  # Too small value
+        config.validate()
+
+    with pytest.raises(AssertionError):
+        config = SimpleEquationsConfig(min_value=100, max_value=50)  # max < min value
+        config.validate()
+
+    with pytest.raises(AssertionError):
+        config = SimpleEquationsConfig(operators=())  # Empty operators
+        config.validate()
+
+    with pytest.raises(AssertionError):
+        config = SimpleEquationsConfig(operators=("+", "^"))  # Invalid operator
+        config.validate()
+
+
+def test_simple_equations_dataset_deterministic():
+    """Test that dataset generates same items with same seed"""
+    config = SimpleEquationsConfig(seed=42, size=10)
+    dataset1 = SimpleEquationsDataset(config)
+    dataset2 = SimpleEquationsDataset(config)
+
+    for i in range(len(dataset1)):
+        assert dataset1[i] == dataset2[i]
+
+
+def test_simple_equations_dataset_items():
+    """Test basic properties of generated items"""
+    config = SimpleEquationsConfig(min_terms=2, max_terms=4, min_value=1, max_value=100, size=10, seed=42)
+    dataset = SimpleEquationsDataset(config)
+
+    for i in range(len(dataset)):
+        item = dataset[i]
+        # Check item structure
+        assert isinstance(item, dict)
+        assert "question" in item
+        assert "answer" in item
+        assert "metadata" in item
+
+        # Check metadata
+        assert "equation" in item["metadata"]
+        assert "variable" in item["metadata"]
+
+        # Verify answer is numeric (allowing negative numbers)
+        answer = item["answer"]
+        assert answer.replace("-", "").isdigit()
+
+        # Verify equation format
+        equation = item["metadata"]["equation"]
+        assert "=" in equation
+        assert item["metadata"]["variable"] in equation
+
+
+def test_simple_equations_dataset_iteration():
+    """Test that iteration respects dataset size"""
+    config = SimpleEquationsConfig(size=5, seed=42)
+    dataset = SimpleEquationsDataset(config)
+
+    items = list(dataset)
+    assert len(items) == config.size
+
+    # Test multiple iterations yield same items
+    assert items == list(dataset)
+
+
+def test_simple_equations_solution_verification():
+    """Test that generated equations have correct solutions"""
+    config = SimpleEquationsConfig(
+        min_terms=2,
+        max_terms=3,
+        min_value=1,
+        max_value=10,  # Small values for predictable results
+        operators=("+", "-"),  # Simple operators for easy verification
+        size=10,
+        seed=42,
+    )
+    dataset = SimpleEquationsDataset(config)
+
+    for item in dataset:
+        # Extract equation parts
+        equation = item["metadata"]["equation"]
+        variable = item["metadata"]["variable"]
+        solution = int(item["answer"])
+
+        # Verify solution by substitution
+        equation_parts = equation.split("=")
+        left_side = equation_parts[0].strip()
+        right_side = int(equation_parts[1].strip())
+
+        # Replace variable with solution
+        evaluated = eval(left_side.replace(variable, str(solution)))
+        assert evaluated == right_side
+
+
+def test_simple_equations_operators():
+    """Test equation generation with different operator combinations"""
+    for operators in [
+        ("+",),
+        ("+", "-"),
+        ("*",),
+        ("+", "*"),
+        ("+", "-", "*"),
+    ]:
+        config = SimpleEquationsConfig(operators=operators, size=5, seed=42)
+        dataset = SimpleEquationsDataset(config)
+
+        for item in dataset:
+            equation = item["metadata"]["equation"]
+            # Verify only allowed operators are used
+            for op in "+-*":
+                if op in equation:
+                    assert op in operators, str(equation)