Test: add unit tests for leaf_commitment and pair_root functions

test_attestation.py

@@ -0,0 +1,20 @@
+import unittest
+from attestation_tool import leaf_commitment, pair_root
+
+class TestAttestationFunctions(unittest.TestCase):
+
+    def test_leaf_commitment(self):
+        # Example values for testing
+        chain_id = 1
+        address = "0xYourContractAddress"
+        slot = 123456
+        block_number = 1000
+        value = bytes.fromhex("0x" + "00" * 32)  # Example empty value
+        leaf = leaf_commitment(chain_id, address, slot, block_number, value)
+        self.assertEqual(len(leaf), 32)
+
+    def test_pair_root(self):
+        leaf_a = bytes.fromhex("0x" + "00" * 32)
+        leaf_b = bytes.fromhex("0x" + "01" * 32)
+        root = pair_root(leaf_a, leaf_b)
+        self.assertEqual(len(root), 66)  # Hex string of 32 bytes + 32 bytes