Add a JsonSerializationError class instead of raising SecurityError

app/models/concerns/blocks_json_serialization.rb

@@ -5,8 +5,10 @@
 module BlocksJsonSerialization
   extend ActiveSupport::Concern
 
-  def to_json(*args)
-    raise SecurityError,
+  JsonSerializationError = Class.new(StandardError)
+
+  def to_json(*)
+    raise JsonSerializationError,
       "JSON serialization has been disabled on #{self.class.name}"
   end
 

spec/models/concerns/blocks_json_serialization_spec.rb

@@ -7,11 +7,11 @@ describe BlocksJsonSerialization do
 
   it 'blocks as_json' do
     expect { DummyModel.new.to_json }
-      .to raise_error(SecurityError, "JSON serialization has been disabled on DummyModel")
+      .to raise_error(described_class::JsonSerializationError, /DummyModel/)
   end
 
   it 'blocks to_json' do
     expect { DummyModel.new.to_json }
-      .to raise_error(SecurityError, "JSON serialization has been disabled on DummyModel")
+      .to raise_error(described_class::JsonSerializationError, /DummyModel/)
   end
 end