[beta] Fixing RPC Filter conversion to EthFilter (#2501)

* Fixing RPC Filter conversion to EthFilter

Conflicts:
	rpc/src/v1/impls/eth.rs
	rpc/src/v1/types/filter.rs

* Removing limit

* Fixing rpc tests

ethcore/src/types/filter.rs

@@ -25,7 +25,7 @@ use std::mem;
 use std::collections::VecDeque;
 
 /// Blockchain Filter.
-#[derive(Binary)]
+#[derive(Binary, Debug, PartialEq)]
 pub struct Filter {
 	/// Blockchain will be searched from this block.
 	pub from_block: BlockID,

rpc/src/v1/tests/eth.rs

@@ -60,6 +60,7 @@ fn miner_service(spec: &Spec, accounts: Arc<AccountProvider>) -> Arc<Miner> {
 			tx_queue_size: 1024,
 			tx_queue_strategy: PrioritizationStrategy::GasPriceOnly,
 			tx_gas_limit: !U256::zero(),
+			tx_queue_strategy: PrioritizationStrategy::GasPriceOnly,
 			pending_set: PendingSet::SealingOrElseQueue,
 			reseal_min_period: Duration::from_secs(0),
 			work_queue_size: 50,

rpc/src/v1/types/filter.rs

@@ -83,9 +83,15 @@ impl Into<EthFilter> for Filter {
 					VariadicValue::Null => None,
 					VariadicValue::Single(t) => Some(vec![t.into()]),
 					VariadicValue::Multiple(t) => Some(t.into_iter().map(Into::into).collect())
-				}).filter_map(|m| m).collect()).into_iter();
-				vec![iter.next(), iter.next(), iter.next(), iter.next()]
-			}
+				}).collect()).into_iter();
+
+				vec![
+					iter.next().unwrap_or(None),
+					iter.next().unwrap_or(None),
+					iter.next().unwrap_or(None),
+					iter.next().unwrap_or(None)
+				]
+			},
 		}
 	}
 }
@@ -97,6 +103,8 @@ mod tests {
 	use util::hash::*;
 	use super::*;
 	use v1::types::BlockNumber;
+	use ethcore::filter::Filter as EthFilter;
+	use ethcore::client::BlockID;
 
 	#[test]
 	fn topic_deserialization() {
@@ -123,4 +131,31 @@ mod tests {
 			topics: None
 		});
 	}
+
+	#[test]
+	fn filter_conversion() {
+		let filter = Filter {
+			from_block: Some(BlockNumber::Earliest),
+			to_block: Some(BlockNumber::Latest),
+			address: Some(VariadicValue::Multiple(vec![])),
+			topics: Some(vec![
+				VariadicValue::Null,
+				VariadicValue::Single("000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b".into()),
+				VariadicValue::Null,
+			]),
+		};
+
+		let eth_filter: EthFilter = filter.into();
+		assert_eq!(eth_filter, EthFilter {
+			from_block: BlockID::Earliest,
+			to_block: BlockID::Latest,
+			address: Some(vec![]),
+			topics: vec![
+				None,
+				Some(vec!["000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b".into()]),
+				None,
+				None,
+			],
+		});
+	}
 }