Feat(consensus) Add test for account (alloy-rs#801)

* Update account.rs

* nits

crates/consensus/src/account.rs

@@ -28,3 +28,51 @@ impl Account {
         keccak256(buf)
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use alloy_primitives::{hex, U256};
+    use alloy_rlp::Decodable;
+
+    #[test]
+    fn test_account_encoding() {
+        let account = Account {
+            nonce: 1,
+            balance: U256::from(1000),
+            storage_root: B256::from_slice(&hex!(
+                "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+            )),
+            code_hash: keccak256(hex!("5a465a905090036002900360015500")),
+        };
+
+        let mut encoded = vec![];
+        account.encode(&mut encoded);
+
+        let decoded = Account::decode(&mut &encoded[..]).unwrap();
+        assert_eq!(account, decoded);
+    }
+
+    #[test]
+    fn test_trie_hash_slow() {
+        let account = Account {
+            nonce: 1,
+            balance: U256::from(1000),
+            storage_root: B256::from_slice(&hex!(
+                "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+            )),
+            code_hash: keccak256(hex!("5a465a905090036002900360015500")),
+        };
+
+        let expected_hash = keccak256(account.encode_to_vec());
+        let actual_hash = account.trie_hash_slow();
+        assert_eq!(expected_hash, actual_hash);
+    }
+    impl Account {
+        fn encode_to_vec(&self) -> Vec<u8> {
+            let mut out = vec![];
+            self.encode(&mut out);
+            out
+        }
+    }
+}