Add IdentitySerializer unit test

Author: Balaji Veeramani

src/sagemaker/serializers.py

@@ -228,4 +228,4 @@ def serialize(self, data):
         """
         buffer = io.BytesIO()
         scipy.sparse.save_npz(buffer, data)
-        return buffer.getvalue()
+        return buffer.getvalue()

tests/unit/sagemaker/test_serializers.py

@@ -24,6 +24,7 @@
     CSVSerializer,
     NumpySerializer,
     JSONSerializer,
+    IdentitySerializer,
     SparseMatrixSerializer,
 )
 from tests.unit import DATA_DIR
@@ -235,6 +236,15 @@ def test_json_serializer_csv_buffer(json_serializer):
         assert result == validation_value
 
 
+@pytest.fixture
+def identity_serializer():
+    return IdentitySerializer()
+
+
+def test_identity_serializer(identity_serializer):
+    assert identity_serializer.serialize(b"{}") == b"{}"
+
+
 @pytest.fixture
 def sparse_matrix_serializer():
     return SparseMatrixSerializer()