Github user MikeThomsen commented on a diff in the pull request: https://github.com/apache/nifi/pull/2672#discussion_r188126334 --- Diff: nifi-mock/src/main/java/org/apache/nifi/util/MockPropertyValue.java --- @@ -202,6 +203,9 @@ public PropertyValue evaluateAttributeExpressions(final AttributeValueDecorator @Override public PropertyValue evaluateAttributeExpressions(final FlowFile flowFile) throws ProcessException { + if (flowFile == null) { --- End diff -- Ok. I'll comment it up and make it clear what it's doing so anyone jumping in there later will understand exactly what's going on there.
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