lastExecution.getInputFileProperties().keySet(),
            thisExecution.getInputFileProperties().keySet(),
            "Input file",
            executable);
        InputFileChanges nonIncrementalInputFileChanges = incrementalInputProperties.nonIncrementalChanges(
            lastExecution.getInputFileProperties(),
            thisExecution.getInputFileProperties()
        );

                return changeDescriptions;
            }

            @Override
            public InputChangesInternal createInputChanges() {
                return new NonIncrementalInputChanges(beforeExecutionState.getInputFileProperties(), incrementalInputProperties);
            }
        };
    }

    def setup() {
        step = createStep()
        _ * work.inputFingerprinter >> inputFingerprinter
        context.getInputProperties() >> { knownInputProperties }
        context.getInputFileProperties() >> { knownInputFileProperties }
    }

    def "delegates when work has no source properties"() {
        def delegateResult = Mock(CachingResult)

                );
        }
        Set<String> taskInputs = new LinkedHashSet<>();
        Set<FilteredTree> filteredFileTreeTaskInputs = new LinkedHashSet<>();
        node.getTaskProperties().getInputFileProperties()
            .forEach(spec -> spec.getPropertyFiles().visitStructure(new FileCollectionStructureVisitor() {
                @Override