add bitwise arithmetic

tests/test_bitwise_arithmetic.py

@@ -0,0 +1,54 @@
+import pytest
+
+from reasoning_gym.arithmetic.bitwise_arithmetic import BitwiseArithmeticConfig, BitwiseArithmeticDataset
+
+
+def test_bitwise_arithmetic():
+    """Test basic properties and solution of generated items"""
+
+    # Easy
+    config = BitwiseArithmeticConfig(
+        seed=42,
+        size=2000,
+        difficulty=1,
+    )
+    dataset = BitwiseArithmeticDataset(config)
+
+    for item in dataset:
+        assert isinstance(item, dict)
+        assert "question" in item
+        assert "answer" in item
+        assert "metadata" in item
+
+        # Test the scoring
+        assert dataset.score_answer(answer=item["answer"], entry=item) == 1.0
+        assert dataset.score_answer(answer=None, entry=item) == 0.0
+        assert dataset.score_answer(answer="kitty cat", entry=item) == 0.01
+
+    config = BitwiseArithmeticConfig(
+        seed=42,
+        size=100,
+        difficulty=5,
+    )
+    dataset = BitwiseArithmeticDataset(config)
+
+    for item in dataset:
+        assert isinstance(item, dict)
+        assert "question" in item
+        assert "answer" in item
+        assert "metadata" in item
+        assert dataset.score_answer(answer=item["answer"], entry=item) == 1.0
+
+    config = BitwiseArithmeticConfig(
+        seed=42,
+        size=100,
+        difficulty=10,
+    )
+    dataset = BitwiseArithmeticDataset(config)
+
+    for item in dataset:
+        assert isinstance(item, dict)
+        assert "question" in item
+        assert "answer" in item
+        assert "metadata" in item
+        assert dataset.score_answer(answer=item["answer"], entry=item) == 1.0