Test coinbase is first for all block test vectors

zebra-consensus/src/block/tests.rs

@@ -129,6 +129,22 @@ async fn check_transcripts() -> Result<(), Report> {
     Ok(())
 }
 
+#[test]
+fn coinbase_is_first_for_historical_blocks() -> Result<(), Report> {
+    let block_iter = zebra_test::vectors::BLOCKS.iter();
+
+    for block in block_iter {
+        let block = block
+            .zcash_deserialize_into::<Block>()
+            .expect("block is structurally valid");
+
+        check::coinbase_is_first(&block)
+            .expect("the coinbase in a historical block should be valid");
+    }
+
+    Ok(())
+}
+
 #[test]
 fn equihash_is_valid_for_historical_blocks() -> Result<(), Report> {
     let block_iter = zebra_test::vectors::BLOCKS.iter();