Added test for null registry to basecodec

eth_abi/codec.py

@@ -32,7 +32,7 @@ class BaseABICodecEncoder():
     def __init__(self, registry):
         if registry is None:
             raise ValueError("`registry` may not be None")
-        
+
         self._registry = registry
 
     def encode_single(self, typ: TypeStr, arg: Any) -> bytes:

tests/test_codec/test_base_abi_codec_encoder.py

@@ -1,4 +1,10 @@
+import pytest
+
 from eth_abi.codec import (
     BaseABICodecEncoder,
 )
 
+
+def test_init_raises_error_for_null_registry():
+    with pytest.raises(ValueError):
+        BaseABICodecEncoder(None)