implemented rpc eth_estimateGas method, added tests for rpc eth_call and eth_estimateGas

ethcore/src/client/mod.rs

@@ -25,6 +25,7 @@ pub use self::client::*;
 pub use self::config::{ClientConfig, BlockQueueConfig, BlockChainConfig};
 pub use self::ids::{BlockId, TransactionId};
 pub use self::test_client::{TestBlockChainClient, EachBlockWith};
+pub use executive::Executed;
 
 use std::collections::HashSet;
 use util::bytes::Bytes;
@@ -38,7 +39,6 @@ use transaction::{LocalizedTransaction, SignedTransaction};
 use log_entry::LocalizedLogEntry;
 use filter::Filter;
 use error::{ImportResult, Error};
-use executive::Executed;
 
 /// Blockchain database client. Owns and manages a blockchain and a block queue.
 pub trait BlockChainClient : Sync + Send {

ethcore/src/client/test_client.rs

@@ -50,6 +50,8 @@ pub struct TestBlockChainClient {
 	pub storage: RwLock<HashMap<(Address, H256), H256>>,
 	/// Code.
 	pub code: RwLock<HashMap<Address, Bytes>>,
+	/// Execution result.
+	pub execution_result: RwLock<Option<Executed>>,
 }
 
 #[derive(Clone)]
@@ -84,12 +86,18 @@ impl TestBlockChainClient {
 			balances: RwLock::new(HashMap::new()),
 			storage: RwLock::new(HashMap::new()),
 			code: RwLock::new(HashMap::new()),
+			execution_result: RwLock::new(None),
 		};
 		client.add_blocks(1, EachBlockWith::Nothing); // add genesis block
 		client.genesis_hash = client.last_hash.read().unwrap().clone();
 		client
 	}
 
+	/// Set the execution result.
+	pub fn set_execution_result(&self, result: Executed) {
+		*self.execution_result.write().unwrap() = Some(result);
+	}
+
 	/// Set the balance of account `address` to `balance`.
 	pub fn set_balance(&self, address: Address, balance: U256) {
 		self.balances.write().unwrap().insert(address, balance);
@@ -185,7 +193,7 @@ impl TestBlockChainClient {
 
 impl BlockChainClient for TestBlockChainClient {
 	fn call(&self, _t: &SignedTransaction) -> Result<Executed, Error> {
-		unimplemented!()
+		Ok(self.execution_result.read().unwrap().clone().unwrap())
 	}
 
 	fn block_total_difficulty(&self, _id: BlockId) -> Option<U256> {

ethcore/src/executive.rs

@@ -37,7 +37,7 @@ pub fn contract_address(address: &Address, nonce: &U256) -> Address {
 }
 
 /// Transaction execution receipt.
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Clone)]
 pub struct Executed {
 	/// Gas paid up front for execution of transaction.
 	pub gas: U256,