String getGroovyExpression() {
                "new File(\"$directoryPath\").listFiles((FileFilter) (File file) -> true)"
            }
        }
    }

    static UndeclaredFileAccess directoryContentWithFilenameFilter(String directoryPath) {
        new UndeclaredFileAccess(directoryPath) {
            @Override
            String getKotlinExpression() {

        "file filter"     | (TestFile it) -> { UndeclaredFileAccess.directoryContentWithFileFilter(testFilePath(it)) }
        "filename filter" | (TestFile it) -> { UndeclaredFileAccess.directoryContentWithFilenameFilter(testFilePath(it)) }
    }

    def "reports reading file on #testCase"() {
        Assume.assumeFalse("cannot use the file APIs in restricted DSL", isRestrictedDsl())