Add tests for validating proposer signature

Author: Bhargavasomu

tests/beacon/state_machines/test_validation.py

@@ -0,0 +1,41 @@
+from eth.beacon.state_machines.validation import (
+    validate_proposer_signature,
+)
+
+from eth.beacon.types.blocks import BaseBeaconBlock
+from eth.beacon.types.states import BeaconState
+
+from tests.beacon.helpers import mock_validator_record
+from tests.beacon.test_helpers import (
+    get_sample_shard_committees_at_slots,
+)
+
+
+def test_validate_proposer_signature(
+        beacon_chain_shard_number,
+        epoch_length,
+        sample_beacon_block_params,
+        sample_beacon_state_params,
+        sample_shard_committee_params):
+    block = BaseBeaconBlock(**sample_beacon_block_params)
+    state = BeaconState(**sample_beacon_state_params).copy(
+        validator_registry=[
+            mock_validator_record(
+                pubkey=0,
+                max_deposit=0,
+            )
+            for _ in range(10)
+        ],
+        shard_committees_at_slots=get_sample_shard_committees_at_slots(
+            num_slot=128,
+            num_shard_committee_per_slot=10,
+            sample_shard_committee_params=sample_shard_committee_params,
+        ),
+    )
+
+    validate_proposer_signature(
+        state,
+        block,
+        beacon_chain_shard_number,
+        epoch_length,
+    )