Increase detail of cached hashing testing

eth2/utils/cached_tree_hash/tests/tests.rs

@@ -29,13 +29,34 @@ where
         // Create a new hasher from the "modified" struct.
         let modified_hasher = CachedTreeHasher::new(modified).unwrap();
 
-        // Test that the modified hasher has the same number of chunks as a newly built hasher.
         assert_eq!(
             hasher.cache.chunk_modified.len(),
             modified_hasher.cache.chunk_modified.len(),
             "Number of chunks is different"
         );
 
+        assert_eq!(
+            hasher.cache.cache.len(),
+            modified_hasher.cache.cache.len(),
+            "Number of bytes is different"
+        );
+
+        assert_eq!(
+            hasher.cache.cache, modified_hasher.cache.cache,
+            "Bytes are different"
+        );
+
+        assert_eq!(
+            hasher.cache.schemas.len(),
+            modified_hasher.cache.schemas.len(),
+            "Number of schemas is different"
+        );
+
+        assert_eq!(
+            hasher.cache.schemas, modified_hasher.cache.schemas,
+            "Schemas are different"
+        );
+
         // Test the root generated by the updated hasher matches a non-cached tree hash root.
         let standard_root = modified.tree_hash_root();
         let cached_root = hasher