test(chain): add block_id! utility macro

Co-authored-by: Wei Chen <wzc110@gmail.com>

crates/chain/tests/common/mod.rs

@@ -1,3 +1,13 @@
+#[allow(unused_macros)]
+macro_rules! block_id {
+    ($height:expr, $hash:literal) => {{
+        bdk_chain::BlockId {
+            height: $height,
+            hash: bitcoin::hashes::Hash::hash($hash.as_bytes()),
+        }
+    }};
+}
+
 #[allow(unused_macros)]
 macro_rules! h {
     ($index:literal) => {{