Merge pull request #966 from zilm13/test/signing-root

Added signing_root to ssz_static tests

specs/test_formats/ssz_static/core.md

@@ -13,6 +13,7 @@ type_name: string  -- string, object name, formatted as in spec. E.g. "BeaconBlo
 value: dynamic     -- the YAML-encoded value, of the type specified by type_name.
 serialized: bytes  -- string, SSZ-serialized data, hex encoded, with prefix 0x
 root: bytes32      -- string, hash-tree-root of the value, hex encoded, with prefix 0x
+signing_root: bytes32 -- string, signing-root of the value, hex encoded, with prefix 0x. Optional, present if type contains ``signature`` field
 ```
 
 ## Condition
@@ -20,4 +21,12 @@ root: bytes32      -- string, hash-tree-root of the value, hex encoded, with pre
 A test-runner can implement the following assertions:
 - Serialization: After parsing the `value`, SSZ-serialize it: the output should match `serialized`
 - Hash-tree-root: After parsing the `value`, Hash-tree-root it: the output should match `root`
+    - Optionally also check signing-root, if present.
 - Deserialization: SSZ-deserialize the `serialized` value, and see if it matches the parsed `value`
+
+## References
+
+
+**`serialized`**: [SSZ serialization](https://github.com/ethereum/eth2.0-specs/blob/dev/specs/simple-serialize.md#serialization)   
+**`root`** - [hash_tree_root](https://github.com/ethereum/eth2.0-specs/blob/dev/specs/simple-serialize.md#merkleization) function  
+**`signing_root`** - [signing_root](https://github.com/ethereum/eth2.0-specs/blob/dev/specs/simple-serialize.md#self-signed-containers) function

test_generators/ssz_static/README.md

@@ -2,3 +2,5 @@
 
 The purpose of this test-generator is to provide test-vectors for the most important applications of SSZ:
  the serialization and hashing of ETH 2.0 data types
+
+Test-format documentation can be found [here](../../specs/test_formats/ssz_static/README.md).

test_generators/ssz_static/main.py

@@ -2,7 +2,11 @@ from random import Random
 
 from eth2spec.debug import random_value, encode
 from eth2spec.phase0 import spec
-from eth2spec.utils.minimal_ssz import hash_tree_root, serialize
+from eth2spec.utils.minimal_ssz import (
+    hash_tree_root,
+    signing_root,
+    serialize,
+)
 from eth_utils import (
     to_tuple, to_dict
 )
@@ -21,6 +25,8 @@ def create_test_case(rng: Random, name: str, mode: random_value.RandomizationMod
     yield "value", encode.encode(value, typ)
     yield "serialized", '0x' + serialize(value).hex()
     yield "root", '0x' + hash_tree_root(value).hex()
+    if hasattr(value, "signature"):
+        yield "signing_root", '0x' + signing_root(value).hex()
 
 
 @to_tuple