def beforeExecution = snapshotOutput(outputDir)
        def outputDirFile = outputDir.createFile("outputDirFile")
        def afterExecution = snapshotOutput(outputDir)

        expect:
        collectFiles(filterOutputAfterExecution(EMPTY, beforeExecution, afterExecution)) == [outputDir, outputDirFile]
    }

    def "overlapping files are not part of the before execution snapshot"() {

        given:
        execute(unitOfWork)

        when:
        outputDirFile.delete()
        outputDirFile.createDir()
        def result = execute(unitOfWork)

        then:
        !result.execution.successful
        !result.reusedOutputOriginMetadata.present
        result.executionReasons == ["Output property 'dir' file ${outputDirFile.absolutePath} has changed."]
    }

            outputDir: new DirectorySnapshot(outputDir.getAbsolutePath(), outputDir.name, FileMetadata.AccessType.DIRECT, TestHashCodes.hashCodeFrom(456), [
                new RegularFileSnapshot(outputDirFile.getAbsolutePath(), outputDirFile.name, TestHashCodes.hashCodeFrom(123), DefaultFileMetadata.file(46, 123, FileMetadata.AccessType.DIRECT))
            ]),
            outputFile: outputFileSnapshot
        ]

        when: