unapprovedSourceFile("src/main/java/org/acme/filtered/FilteredUnapprovedLicensed.java")

        when:
        def result = gradleRunner("licenseHeaders").build()

        then:
        result.task(":licenseHeaders").outcome == TaskOutcome.SUCCESS
    }

    private File unapprovedSourceFile(String filePath = "src/main/java/org/acme/UnapprovedLicensed.java") {