From 6d69906159e04edf756c0deeb96e670490e50b91 Mon Sep 17 00:00:00 2001
From: Nikolay Volf <nikvolf@gmail.com>
Date: Wed, 27 Jan 2016 21:31:14 +0400
Subject: [PATCH] working blockhain sequence generator

---
 src/blockchain.rs    |  6 +++---
 src/tests/helpers.rs | 23 +++++++++++++++++++++--
 2 files changed, 24 insertions(+), 5 deletions(-)

diff --git a/src/blockchain.rs b/src/blockchain.rs
index f0e2ff62f..bdd1ba9a2 100644
--- a/src/blockchain.rs
+++ b/src/blockchain.rs
@@ -765,8 +765,8 @@ mod tests {
 	}
 
 	#[test]
-	fn can_consist_of_random_blocks() {
-		let bc = generate_dummy_blockchain(100);
-		assert_eq!(bc.best_block_hash(), 0);
+	fn can_contain_arbitrary_block_sequence() {
+		let bc = generate_dummy_blockchain(50);
+		assert_eq!(bc.best_block_number(), 49);
 	}
 }
diff --git a/src/tests/helpers.rs b/src/tests/helpers.rs
index a522d24fe..ad27f75ed 100644
--- a/src/tests/helpers.rs
+++ b/src/tests/helpers.rs
@@ -45,6 +45,18 @@ pub fn create_test_block(header: &Header) -> Bytes {
 	rlp.out()
 }
 
+fn create_unverifiable_block(order: usize, parent_hash: H256) -> Bytes {
+	let mut header = Header::new();
+	header.gas_limit = x!(0);
+	header.difficulty = x!(order * 100);
+	header.timestamp = (order * 10) as u64;
+	header.number = order as u64;
+	header.parent_hash = parent_hash;
+	header.state_root = H256::from_str("0000000000000000000000000000000000000000000000000000000000000000").unwrap();
+
+	create_test_block(&header)
+}
+
 pub fn generate_dummy_client(block_number: usize) -> Arc<Client> {
 	let dir = RandomTempPath::new();
 
@@ -82,7 +94,14 @@ pub fn generate_dummy_client(block_number: usize) -> Arc<Client> {
 
 pub fn generate_dummy_blockchain(block_number: usize) -> BlockChain {
 	let temp = RandomTempPath::new();
-	let genesis = "fffffff".from_hex().unwrap();
-	let bc = BlockChain::new(&genesis, temp.as_path());
+	let bc = BlockChain::new(
+		&create_unverifiable_block(
+			0,
+			H256::from_str("0000000000000000000000000000000000000000000000000000000000000000").unwrap()),
+		temp.as_path());
+
+	for block_order in 1..block_number {
+		bc.insert_block(&create_unverifiable_block(block_order, bc.best_block_hash()));
+	}
 	bc
 }
\ No newline at end of file