Add tests for ValidatorRegistryDeltaBlock RLP object

Author: Bhargavasomu

tests/beacon/conftest.py

@@ -294,6 +294,16 @@ def sample_validator_record_params():
     }
 
 
+@pytest.fixture
+def sample_validator_registry_delta_block_params():
+    return {
+        'latest_registry_delta_root': b'\x01' * 32,
+        'validator_index': 1,
+        'pubkey': 123,
+        'flag': 1,
+    }
+
+
 #
 # Temporary default values
 #

tests/beacon/types/test_validator_registry_delta_block.py

@@ -0,0 +1,13 @@
+from eth.beacon.types.validator_registry_delta_block import (
+    ValidatorRegistryDeltaBlock,
+)
+
+
+def test_defaults(sample_validator_registry_delta_block_params):
+    validator_registry_delta_block = ValidatorRegistryDeltaBlock(
+        **sample_validator_registry_delta_block_params
+    )
+    assert validator_registry_delta_block.latest_registry_delta_root == sample_validator_registry_delta_block_params['latest_registry_delta_root']  # noqa: E501
+    assert validator_registry_delta_block.validator_index == sample_validator_registry_delta_block_params['validator_index']  # noqa: E501
+    assert validator_registry_delta_block.pubkey == sample_validator_registry_delta_block_params['pubkey']  # noqa: E501
+    assert validator_registry_delta_block.flag == sample_validator_registry_delta_block_params['flag']  # noqa: E501