+
+pub struct MockChainListener {
+ expected_blocks_connected: VecDeque<BlockHeaderData>,
+ expected_blocks_disconnected: VecDeque<BlockHeaderData>,
+}
+
+impl MockChainListener {
+ pub fn new() -> Self {
+ Self {
+ expected_blocks_connected: VecDeque::new(),
+ expected_blocks_disconnected: VecDeque::new(),
+ }
+ }
+
+ pub fn expect_block_connected(mut self, block: BlockHeaderData) -> Self {
+ self.expected_blocks_connected.push_back(block);
+ self
+ }
+
+ pub fn expect_block_disconnected(mut self, block: BlockHeaderData) -> Self {
+ self.expected_blocks_disconnected.push_back(block);
+ self
+ }
+}
+
+impl ChainListener for MockChainListener {
+ fn block_connected(&mut self, block: &Block, height: u32) {
+ match self.expected_blocks_connected.pop_front() {
+ None => {
+ panic!("Unexpected block connected: {:?}", block.block_hash());
+ },
+ Some(expected_block) => {
+ assert_eq!(block.block_hash(), expected_block.header.block_hash());
+ assert_eq!(height, expected_block.height);
+ },
+ }
+ }
+
+ fn block_disconnected(&mut self, header: &BlockHeader, height: u32) {
+ match self.expected_blocks_disconnected.pop_front() {
+ None => {
+ panic!("Unexpected block disconnected: {:?}", header.block_hash());
+ },
+ Some(expected_block) => {
+ assert_eq!(header.block_hash(), expected_block.header.block_hash());
+ assert_eq!(height, expected_block.height);
+ },
+ }
+ }
+}
+
+impl Drop for MockChainListener {
+ fn drop(&mut self) {
+ if std::thread::panicking() {
+ return;
+ }
+ if !self.expected_blocks_connected.is_empty() {
+ panic!("Expected blocks connected: {:?}", self.expected_blocks_connected);
+ }
+ if !self.expected_blocks_disconnected.is_empty() {
+ panic!("Expected blocks disconnected: {:?}", self.expected_blocks_disconnected);
+ }
+ }
+}