Run deserialize_blockheader on every test vector

zebra-chain/src/block/tests/vectors.rs

@@ -50,11 +50,22 @@ fn blockheaderhash_from_blockheader() {
 
 #[test]
 fn deserialize_blockheader() {
-    // https://explorer.zcha.in/blocks/415000
-    let _header = zebra_test::vectors::HEADER_MAINNET_415000_BYTES
+    zebra_test::init();
+
+    // Includes the 32-byte nonce and 3-byte equihash length field.
+    const BLOCK_HEADER_LENGTH: usize = crate::work::equihash::Solution::INPUT_LENGTH
+        + 32
+        + 3
+        + crate::work::equihash::SOLUTION_SIZE;
+
+    for block in zebra_test::vectors::BLOCKS.iter() {
+        let header_bytes = &block[..BLOCK_HEADER_LENGTH];
+
+        let _header = header_bytes
             .zcash_deserialize_into::<Header>()
             .expect("blockheader test vector should deserialize");
     }
+}
 
 #[test]
 fn deserialize_block() {